Predator 212 Stock Valve Springs

138 crank, Honda Flat Top Piston, 1MM Rings, Choice Of 275 Lift Cam Or 315 Cam, Choice of Ported 18cc Head or 14cc head, ARC rod, 27mm Stainless Intake valve, 25mm Stainless Exhaust valve, 26 lbs springs, Single retainers and keepers, Champion Rockers 6. Engine is complete with a "Big Dog" carb, totally welded tank, Dyno cam & springs, Arc rod etc. My Tiny Tach tells me the valves float at 8700RPM. 8 lb valve springs were pretty useless. Which valve springs do I want for a predator 212 hemi looking to spin possibly up to 7000 rpm with a stock cam? I've heard a lot of people say 18#, and people saying 18# isn't good for the hemi 212. JKC Provides a wide range of parts from off road go karts, Racing Karts, to OEM engine parts for clone 196cc engines and 212 Harbor Freight Predator Engines. • Valve Springs may be replaced with stock style springs only- Maximum 10. Classes: ALL * Note that the track has the right to make exception to what class a junior driver may race in based on age and or experience for the safety of that driver as well as. I recall my dad eating lifters off in his 383 stroker during break in because the spring rate was too high. View and Download Predator Engines PREDATOR 212 owner's manual & safety instructions online. 798"(wire diameter. 308 Standard Length. Got the Predator torn down, removed the governor and installed the cam. Only 10 left in stock - order soon. Check us out on. All Honda/Clone GX160 & GX200 engines & Predator 212 (including Torini Clubmaxx) New. Ive added a Stage one kit, Governor still in but rigged to run wfo. 212 Kart Spring Go Non-hemi Hemi Engine Kit Valve Springs @ Predator 22lb Racing 22lb Non-hemi @ Engine Hemi Predator Go Valve Racing Spring Springs Kart 212 Kit Predator 212 Valve Rlv Extreme 35 Chain Gold On Gold 120 Links Mini Bike And Kart Free Shipping Rlv Extreme - $22. 8lb valve springs, tank removed. Holding it down, I could hold maintain a steady 21mph. Predator 212, Honda GX200 or Titan up to 26hp Many modifications can be performed on your Titan or other engines including Honda, Predator and more, for little or no cost. OEM and Aftermarket supplier of Outdoor Power Equipment Parts, Arborist and Landscape Supplies. Removed Governor ARC 6626 Billet Flywheel Mod2 Dynocam 22lb springs Billet Valve Spring Keepers and HD Lash Caps Stainless valves , Cromemolly push rods ARC Billet Rod 3. Stock configuration gasket and/or sealer allowed. Buy Predator 212cc Mini Bike Kit - Stage 1 - Non-Hemi at Walmart. And removing the governor system on your engine. The spring pockets in the hemi head are alot shorter than other heads, and the 18lb springs are taller than other springs. 375" length allowed of any material. ARC Racing Dual Bearing Billet Sidecover for GX200/Clone Predator Hemi. 212cc Predator Head Gasket. 5 HP Honda or Clone Engine- This high performance valve spring is compatible with most 5. 8 lb valve springs were pretty useless. Everything elss is stock. Only Box Stock valve springs. Valve Train: must use stock pushrods, rocker arms, retainers and valve springs. 815", must be checked by using the. These springs are recommended for use with the stock. This guide can help you understand what valves your Predator engine came with. We offer springs for Stock, Modified, and Open Kart Racing Class. NO ALTERATIONS And/or AFTERMARKET VALVE TRAIN COMPONENTS ALLOWED. Stock OEM valve retainer for the 196cc engine. Used (normal wear), These came off my pretty much brand new hemi predator 212cc. Ducar 212 Engine, complete with PVL indestructible flywheel. I have on in a minibike currently that has a billet rod, flat top piston, billet fly wheel, upgraded cam, 26lb valve springs, port work, a mikuni carb, and the governor removed. Predator 212cc Jet Kit Instructions; Predator 212cc Valve Sizes; Predator 212cc Torque Specs, Billet Rod & Flywheel; Predator 212cc Governor Removal; What size jet do I need for my Predator 212cc engine? Hemi or non - what do I have- which is better? What spark plug do I need for my Predator 212cc engine? Predator 212cc Torque Specs, Billet Rod. Re: My First Golf Cart Build. Valve Spring Cover Asm. VALVE SPRINGS explained ** BEST SPRING *for* HIGH RPM ** spring RATE ,install HEIGHT, *predator 212 - Duration: 38:54. 60 White - $1,799. Predator 212cc Engines and Parts from BMI Karts. Comp Cams. The formula used to determine whether a spring has sufficient coil-bind clearance is: valvespring installed height on the seat – (cam lobe lift × rocker arm ratio) + valve lash – safety. This valve seat is a custom part made by ARC to be used with our 28. Summit Racing has single, dual, triple, beehive, and conical valve springs to meet your engine's demands—no matter how high the rpm or lift!. 812?, Coil Bind at. Unbelievable prices on Head Valve!Presenting a comprehensive assortment of Head Valve for sale right now. 450: 251-TH: Honda CB 350 Twin - 5. Could run about 1/2 throttle at 3200ish rpms and run 11mph. Note that air cooled OHV. 80 Predator 6. Ducar 212 Engine, complete with PVL indestructible flywheel. 245" on both intake and exhaust lobes. 00 60 White Bathtub Whirlpool Jetted Hydrotherapy 19 Massage Air Jets Heater New. 5mm stems, 25mm intake, 24mm exhaust. You must have a lash cap DJ-1050 with this retainer. 5HP Centrifugal Clutch 34" Bore 12 Tooth #35 Chain 5 Feet For Predator 212cc - $24. 5HP 212cc For #35 Chain Feet Centrifugal Tooth Bore 5 34" Clutch 12 12 5 Clutch 34" Predator Centrifugal Feet Tooth Chain 6. This is how the inside of your KX21 valve cover should look. 815" spring must go gauge with retainer seal in place on intake an exhaust valve if used. 25 inch prop. This pair of valve springs is an excellent upgrade for your performance 212cc Predator, Honda GX200, BSP, and most other GX200 OHV clone engines. Spring, Valve, 26 lb at. RPQ RacersProQuip Kart Racers, Mini Bike riders, We offer what you need, when you need it to run better, go faster and Finish in the front! Home of the "SuperJet" Race Winning Carburetors, All listed products and parts are in stock and on the shelf in our Memphis, TN warehouse, Memphis is Americas Distribution Center, Custom Engine Services Offered We Race what we sell!. Save on Kart Racing Parts. OEM valve springs only with a maximum spring diameter of. Only Box Stock valve springs. REQUIRES UPGRADED VALVE SPRINGS BILLET ROD AND FLYWHEEL This cam requires a bored stock carb or an. 212cc Predator Motor A Tillotson PK-1 Carburetor And Enhanced Racing Valve Springs For Maximum Performance And Consistency. While the Predator has been shown to be ever changing over the years we still provide the essential parts. Crank rod and piston must be factory without any modifications. - Upgraded stock lift racing cam - Upgraded valve springs - Everything has been checked and tweaked for max performance. 5 mm Conversionw/Guides: Ti: 2C/4V. Shop with confidence. 138 crank, Honda Flat Top Piston, 1MM Rings, Choice Of 275 Lift Cam Or 315 Cam, Choice of Ported 18cc Head or 14cc head, ARC rod, 27mm Stainless Intake valve, 25mm Stainless Exhaust valve, 26 lbs springs, Single retainers and keepers, Champion Rockers 6. UPGRADING VALVE SPRINGS: After the govenor is removed, the stock valve springs will begin to float and limit your rpm to about 5200. Locate cylinder head valves in stock here online!. Sold at 12. 036 drilled main jet into the carb with a straight pipe exhaust. 308" race. For Predator 212cc 6. This is a race ready engine, it is guaranteed to run but as with all racing parts there is no warranty. The Predator 212 engine has a large amount of potential. 815" height no shimming. 212cc predator has been built to a stage 4 212cc predator. Predator 212cc Engines and Parts from BMI Karts. The online leader for parts for go-karts, minibikes, and drift trikes. Featuring N Clone for sale this week. If I remove the governor on my predator 212cc engine. com: predator 212 valve springs. OMB Warehouse - Go Kart Parts and Mini Bike Parts. - Upgraded stock lift racing cam - Upgraded valve springs - Everything has been checked and tweaked for max performance. Comp Cams. Best fit in a stock hemi head is 22lb or 26lb but both those are alot thicker than the diameter rule you have. Everything elss is stock. This engine is not for young or inexperienced drivers. Valve Train: must use stock pushrods, rocker arms, retainers and valve springs. Stage 0ne Predator 212cc Kart Racing High Performance Kit Air and 5 Jet Set! USA Stage 0ne Predator. Dynojet Stage. (NEW) 212cc Box Stock Project Engine (Assembled in the USA!) with all high quality hand picked Box Stock Project parts to include the following; (NEW) JT head, hardened heat treated crankshaft guaranteed (2. This Predator head will have stock size stainless valves, 25mm intake and 24mm exhaust with automotive style split keepers. Our site promotes a varied selection at unbelievable prices. 073” max) and a maximum tension of 10. 26LB Valve Springs for Predator 212, Clone 196cc, Ducar 26LBS. No alteration allowed to internal baffle assembly. The duration check for Intake and exhaust lobes is listed below. 5mm stems, 25mm intake, 24mm exhaust. About 14% of these are knife, 4% are utility knife, and 3% are access control system. Kits are 100% Complete with all parts needed (Engine not Included). 5 after rejetted and it's getting the winter air and proper fuel. 5HP Bore For 212cc #35. Exhaust is not included and must be ordered separate. OEM valve springs only with a maximum spring diameter of. Due to canted valve arrangement, Hemi's may have valve to piston clearance issue with high lift cam These Rocker Arms require shorter Pushrods, typically 5. Also for: 69727, 69730. 5 HP Predator outfitted with 18lb valve springs, governor removed, Mikuni 22mm small body carb, TAV 2 30 Series Torque Converter and custom straight pipe that sounds great. the Honda Class. Modified And After market Performance Clone Parts. (Installed Height for valve springs. 5 mm Conversionw/Guides: Ti: 2C/4V. Intake will require an oversized seat, where as the 25mm will fit the 23. Predator 212cc Air Filter and Carburetor Jet Kit Bullfrog Performance Products Air Filter and Carb Jet kit upgrade for the Predator 212cc Harbor Freight engine. This engine comes stock and can be used "Stock out of the box". • Replacing worn valve spring is not considered tampering as long as they are replaced EXACTLY as stock. Find great deals on eBay for 212 predator valve springs. Next I saw on GardenWeb about the Predator 212 should like most small engines have 120 psi and seems a lemon someone got had 30 psi. Lift taken on valve spring retainer with zero lash. VALVE COVER: Stock OEM valve cover. Horsepower ratings are for reference only and assumed tuned exhaust. To be certain you will need to measure the stem and face diameters. 300" lift and higher. 308 Standard Length. NO ALTERATIONS And/or AFTERMARKET VALVE TRAIN COMPONENTS ALLOWED. Valve cover may be drilled for pulse fitting, but fitting may not protrude into or through baffle plate, or interfere with proper operation of the baffle assembly. Best Predator 212 Hemi Exhaust prices online | Predator 212 Hemi Exhaust for sale with amazing discounts from top websites | Check out the best deals today by MSN. Gopowersports is truly your only one-stop-shop for all your go kart parts needs. Discount go kart parts and go kart engines. Predator Class Rules. Chassis Parts. Comes with our header, and is broke-in and dynoed. Valve Chart Valve lift Intake BTDC +/- 2 Degrees ATDC +/- 2 Degrees Valve lift. This is NOT an absolute guide as some parts could be changed when the engine was produced. 212cc RTC-01. 073" max) and a maximum tension of 10. 038 carb jet allowed, air cleaner stock box or adapted high flow allowed, stock flywheel, Fuel tank may be mounted on engine or on floor. Part # Description Year Alloy Cylinder / Valve Max Lift; 251-H: Honda CB 350 Twin: Ti: 2C/4V: 0. This is a copy of a stock valve spring, made from a special material that has been manufactured to right at 10. Intake will require an oversized seat, where as the 25mm will fit the 23. Make that 20 degrees and larger jets, the engine breaths well with no air filter and it feels MUCH stronger. these springs will also work with the honda gx160, gx200 and all similar clone engines. Stock piston. Note that air cooled OHV. Super Simple Predator 212 cc Engine Mods. OMB Warehouse - Go Kart Parts and Mini Bike Parts. 036 drilled main jet into the carb with a straight pipe exhaust. - Upgraded stock lift racing cam - Upgraded valve springs - Everything has been checked and tweaked for max performance. When doing the correct engine mods. Shop with confidence. There will be no exchange or mixing of parts between different model engines. May end up going to a bigger one and stronger valve springs along with it for higher RPM's now that the governor is out. Valve Chart Valve lift Intake BTDC +/- 2 Degrees ATDC +/- 2 Degrees Valve lift. New adjustable length Billet aluminum pushrods for the Intek Single/Twin and Vanguard models. the Honda Class. These springs are recommended for use with the stock. 3 ratio rockers. plus reviews and ratings. if they rev past 5500 so no valve float but need lotsa strength to pull start it. Installed height of spring is. If you have lots of air coming into the engine, you need to release it with little resistance for added performance. 5 Clones, Includes Pulse fitting and bolts, Pic for reference only, Engraving may vary. I am not sure what kind of power its putting out. Everything elss is stock. Bought new from Tractor Supply it has been engine swapped with a 212cc 6. Valve Spring Cover Asm. Their high-strength properties, superior alloy, and proven real-world durability make them an excellent choice for your engine. Crank rod and piston must be factory without any modifications. We add a ground camshaft and appropriate valve springs, top it off top plate, fuel pump, and inline filter. It seems like ARC is the "top dog" in regards to clone bellet rods, so I will probably order from them. Camshaft must appear stock, lobe base circle may not be less than. Predator 212 Valve Spring Kit 22lb Non-hemi @ Hemi Engine Springs Go Kart Racing Predator 212 - $13. Get High Valve online with fast and free shipping. Small Engine Cams is the leader in custom racing cams for minibikes, karts, jr dragsters, lawnmowers, and small boats. Predator 212cc Jet Kit Instructions; Predator 212cc Valve Sizes; Predator 212cc Torque Specs, Billet Rod & Flywheel; Predator 212cc Governor Removal; What size jet do I need for my Predator 212cc engine? Hemi or non - what do I have- which is better? What spark plug do I need for my Predator 212cc engine? Predator 212cc Torque Specs, Billet Rod. Dynojet Stage. NO ALTERATIONS And/or AFTERMARKET VALVE TRAIN COMPONENTS ALLOWED. I recall my dad eating lifters off in his 383 stroker during break in because the spring rate was too high. Roberts Kart Shop stocks every part for the 6. Exhaust is not included and must be ordered separate. 5 Clone Performance for Karting, 1/4 Midget, Mini-Bike, Mokai, Winch Boarding, Tractor pulling, and Bar Stool applications. Buy Predator 212cc Mini Bike Kit - Stage 1 - Non-Hemi at Walmart. Simply put, a bigger hole flows more than a smaller hole. 8 lb valve springs were pretty useless. 8# legal race valve springs, check installed height, set running lift, set valve lash, assemble race ready blueprinted carb and mount, mount flywheel and set coil gap, check rod bolts, cam timing, valve. 8lb valve springs, tank removed. I do 18lb valve springs, jet the carb, gov removal, exhaust, oil sensor delete, and advance the flywheel. Stock GX390. 3 ratio rockers to give us a bit more lift, and some mild cleanup of the ports. Springs Engine Non-hemi Predator Valve 212 22lb Kart Racing @ Spring Hemi Go Kit Spring 212 Kart Predator Kit Valve Non-hemi Engine Hemi @ Springs Racing 22lb Go Predator 212 Valve. 8 pounds at. I have no facts to back this up, but I wouldn't think there would be a problem with the stock flywheels coming apart at 5k. Don't forget to like, comment, share and subscribe. JKC Provides a wide range of parts from off road go karts, Racing Karts, to OEM engine parts for clone 196cc engines and 212 Harbor Freight Predator Engines. I installed it and a. Predator 212cc Hemi On Gasoline FOR NOW Stock Head Performance Air Filter / Exhaust (Stage 1 Kit) Black Mamba Jr Cam 26 lb Valve Springs SS Valves (27mm intake, 25mm Exhaust) Mild Intake Porting - didn't enlarge, just smoothed out the rough stuff (nothing done to combustion chamber or exhaust) +0. 5:1 range) mud boat muffler from OMB , Burris Cylinder Head Stud Kit , 140 emulsion tube,038 main jet,air. Predator 212cc Air Filter and Carburetor Jet Kit Bullfrog Performance Products Air Filter and Carb Jet kit upgrade for the Predator 212cc Harbor Freight engine. Below are the available bulk discount rates for each individual item when you purchase a certain amount. Hemi valve spring removal w/head on the block? actually nothign more then a piece of flat stock wich catchs the upper and lower part of the spring and it has a. Boat was completely empty. BOLT ON HOP UP KITS FOR HONDA & CLONES. Can I paint the gas tank and engine cover of my 212 predator? "Mod 2" cam and rpm with 18lb springs. 5HP Bore For 212cc #35. Currently only the factory or BSP and CL-1 cams will meet this spec. We sell Genuine Subaru Kart Sports Replacement Valve Train Components. 8lb valve springs, tank removed. With that rule, you will be stuck using 10. Chassis Parts. Valve Seat Cutting with Neway Valve seat reconditioning is simple, accurate, and clean with Neway's carbide-bladed cutters. Well i fired it up and i heard a ticking sound? Thought it might be the valves so i removed the valve cover. Sort By: DJ-1045 Retainer, Exhaust Spring 196CC. Whether you are a recreational user or want to race, these upgrades will help you unleash the power of your. Max valve lift. Fits 196cc and 212cc clone motors! Guaranteed legal to be used in all kart racing sanctioning bodies. we have what you need. Predator 212cc Engines and Parts from BMI Karts. (4800-5k rpm according to the interweb). Lightest and highest quality on the market. For Predator 212cc 6. Small Engine Cams is the leader in custom racing cams for minibikes, karts, jr dragsters, lawnmowers, and small boats. We have a wide selection of go kart valve springs. No alteration allowed to internal baffle assembly. 003 - chromoly push rods (stock length 5. Skip to main content Predator 212 Racing Factory Stock premium Valve Springs 10. 3 liter top mount gas tank. The DCS-BP is the strongest spring recommend for use with stoc. Only Box Stock valve springs. The horizontal shaft is ball-bearing mounted, making this gas engine an ideal replacement for most standard engine configurations. Stock OEM valve retainer for the 196cc engine. Whether you are a recreational user or want to race, these upgrades will help you unleash the power of your. 5mm stems, 25mm intake, 24mm exhaust. Stock piston. Bought new from Tractor Supply it has been engine swapped with a 212cc 6. To achieve zero valve lash for checking running lift, preload dial indicator by. Boat was completely empty. This is a race ready engine, it is guaranteed to run but as with all racing parts there is no warranty. No alteration allowed to internal baffle assembly. Classes: ALL * Note that the track has the right to make exception to what class a junior driver may race in based on age and or experience for the safety of that driver as well as. You minimize the amount of blow-by due to valve float. Today I do a few mods to the Predator 212 (Hemi). Cam is BOLT IN and does not require block modifications yet keeps close to stock base circle to maintain correct valve train geometry. 5 mm Conversionw/Guides: Ti: 2C/4V. 212 LB 26 Predator 4-each 2pr Racing USA Valve Hemi & Kart Hemi Springs Non Non Kart Springs Hemi 212 Valve Racing Hemi 2pr USA LB & Predator 26 4-each $17. Predator 212 Hemi Only 18 pound Valve Springs And Jet Kit Stage 1 2 3 24hrship. I like to accumulate the needed parts and information for a build beforehand so that when the time comes for building I'm more or less ready. 6148Y Valve Seat, GX200/Clone Oversize Intake. Stock GX390. Also the Torque Converter which is a China version of the TAV2 i got from Blast LED with all the parts for the predator and an extra belt for $129 and free shipping from Ebay. Unbelievable prices on Head Valve!Presenting a comprehensive assortment of Head Valve for sale right now. NO ALTERATIONS And/or AFTERMARKET VALVE TRAIN COMPONENTS ALLOWED. Head gasket surface must remain stock. Fits 196cc and 212cc clone motors! Guaranteed legal to be used in all kart racing sanctioning bodies. 8lb Racing Valve Springs Honda GX200 Predator 212 Kart AKRA at the best online prices at eBay!. Most importantly, it has as much as 4 lbs more pressure at max lift (. I have a 212 Hemi Predator. Predator 350 (age 15 & up) 350# No restrictor. I have on in a minibike currently that has a billet rod, flat top piston, billet fly wheel, upgraded cam, 26lb valve springs, port work, a mikuni carb, and the governor removed. 5 after rejetted and it's getting the winter air and proper fuel. Predator 212 Stock Gasket set includes the following: Carb to intake insulator gasket, Intake insulator to head gasket, Header gasket, Valve cover gasket, Side cover gasket, Air box to carb spacer, Head gasket, NOTE!!!. Stateline Karts 2019 Predator Class Rules Approved Engines: OHV (Overhead Valve) 212cc Predator engine only. 038 carb jet allowed, air cleaner stock box or adapted high flow allowed, stock flywheel, Fuel tank may be mounted on engine or on floor. Valve Train: must use stock pushrods, rocker arms, retainers and valve springs. CARBURETOR: Stock Predator carburetor with integral fuel shut off valve, (No Honda or clone carbs allowed). Shop with confidence. This valve seat is a custom part made by ARC to be used with our 28. Some rules and specifications are specific to each engine model. Small diameter spring. Not sure if I'm to do the break in on the cam with the stock valve springs or the 22lb units. Stock low speed jet, (I think 16 or 18). What valve springs are recommended? Where can I get a pair? Thanks for any info. The lowest prices on go kart valve springs guaranteed. 8R: Dyno Cams Valve Spring - 10. performance. 00 60 White Bathtub Whirlpool Jetted Hydrotherapy 19 Massage Air Jets Heater New. This is a copy of a stock valve spring, made from a special material that has been manufactured to right at 10. large inventory of discount Kart Racing Parts. Small Engine Cams is the leader in custom racing cams for minibikes, karts, jr dragsters, lawnmowers, and small boats. Can also be fitted to Torini Clubmaxx and other Predator 212cc engines. Showcasing in stock today. 5hp engines. 5:1 range) mud boat muffler from OMB , Burris Cylinder Head Stud Kit , 140 emulsion tube,038 main jet,air. What valve springs are recommended? Where can I get a pair? Thanks for any info. the Honda Class. The DCS-BP is the strongest spring recommend for use with stoc. 145" larger than the stock seat. Only at Kart Parts Depot. save on High Valve. Our site promotes a varied selection at unbelievable prices. The Truth About Valve Springs. PREDATOR" HARBOR FREIGHT 212 CC OHV HORIZONTAL SHAFT GAS ENGINE PARTS- CONNECTING ROD. 50 blue printed carb, top plate, fuel pump, pulse. These engines are shipped with NO OIL. 20 rod, mod2 cam, 22 lb valve springs, carb, 8 degree timing key, intake, and small fan. fits the 5. Disclaimer: This product is intended for closed-course racing only and the parts contained in this kit are not for aircraft use. Regular price $11 View. Well i fired it up and i heard a ticking sound? Thought it might be the valves so i removed the valve cover. Added the billet +. Whether you are a recreational user or want to race, these upgrades will help you unleash the power of your. The valve spring retainer to valve stem seal clearance at maximum lift is the limiting factor with stock L31 Vortec heads. View all Valve Spring, Dual, 50lb. Awesome prices for. Go to our Online Specials page for pricing. Stage 0ne Predator 212cc Kart Racing High Performance Kit Air and 5 Jet Set! USA Stage 0ne Predator. We use the Predator 212 engine a lot in stage 1, stage 2, stage 3, and now stage 4 variants. Gen 1 Predator (non-hemi); 5. 038 carb jet allowed, air cleaner stock box or adapted high flow allowed, stock flywheel, Fuel tank may be mounted on engine or on floor. It seems like ARC is the "top dog" in regards to clone bellet rods, so I will probably order from them. VALVE SPRINGS explained ** BEST SPRING *for* HIGH RPM ** spring RATE ,install HEIGHT, *predator 212 - Duration: 38:54. Upgraded to billit flywheel with 32degree timing advance and stiffer valve springs installed. Click for larger image. We add a ground camshaft and appropriate valve springs, top it off top plate, fuel pump, and inline filter. The inside diameter of this seat is. Re: My First Golf Cart Build. Valve cover may be drilled for pulse fitting, but fitting may not protrude into or through baffle plate, or interfere with proper operation of the baffle assembly. Click for larger image. I installed it and a. Only 10 left in stock - order soon. The formula used to determine whether a spring has sufficient coil-bind clearance is: valvespring installed height on the seat – (cam lobe lift × rocker arm ratio) + valve lash – safety. We installed 18LB Valve Springs and it was a very simple upgrade allowing us to spin our engine up to 6500 rpm. Got back home and started to sketch in Autocad. (Measured at top of valve retainer). RPQ RacersProQuip Kart Racers, Mini Bike riders, We offer what you need, when you need it to run better, go faster and Finish in the front! Home of the "SuperJet" Race Winning Carburetors, All listed products and parts are in stock and on the shelf in our Memphis, TN warehouse, Memphis is Americas Distribution Center, Custom Engine Services Offered We Race what we sell!. Shim In Tappet (SIT) KPMI P/N. - Upgraded stock lift racing cam - Upgraded valve springs - Everything has been checked and tweaked for max performance. Small diameter spring. You may save this images for a larger view. Engine: Box stock predator brand engine Allowed (No Ducar 212, tillotson 212, bsp 212), Pipe with muffler (screw on or clamp on) Allowed, removed govenor allowed,. 8R: Dyno Cams Valve Spring - 10. Complete kit. Valve springs are one of the most critical and most overlooked components in your engine.