This tool is necessary when installing upgraded valve springs or retainers. It is essential to get cylinder #1 at top dead center to get the cam timing perfect and ensure peak performance. THIS TOOL IS ONLY COMPATIBLE WITH YAMAHA 1.8L/1.9L HO, SHO, AND SVHO ENGINES!...

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These precision machined billet aluminum knobs provide quick and easy access to your engine for maintenance & cleaning. Directly replaces original steel mounting screws securing engine cover that are prone to corrosion. A practical upgrade that installs in minutes and looks awesome! Provides ...

These precision machined billet aluminum knobs provide quick and easy access to your engine for maintenance & cleaning. Directly replaces original steel mounting screws securing engine cover that are prone to corrosion. A practical upgrade that installs in minutes and looks awesome! Provides ...

These precision machined billet aluminum knobs provide quick and easy access to your engine for maintenance & cleaning. Directly replaces original steel mounting screws securing engine cover that are prone to corrosion. A practical upgrade that installs in minutes and looks awesome! Provides ...

Our Billet Aluminum Engine Oil Filler Cap adds durability and a custom look to your engine compartment. Precision machined from 6061 billet aluminum and anodized for a long lasting and durable finish. Direct replacement for original plastic oil cap on all Yamaha 1.8L HO, SHO & SVHO engines. Includes...

Our Billet Aluminum Engine Oil Filler Cap adds durability and a custom look to your engine compartment. Precision machined from 6061 billet aluminum and anodized for a long lasting and durable finish. Direct replacement for original plastic oil cap on all Yamaha 1.8L HO, SHO & SVHO engines. Includes...

Our ultra high strength RIVA cylinder head stud kit is essential equipment when upgrading internal components on your high boost Yamaha engine. Precision machined from premium grade 8740 alloy and heat treated to exacting tolerances, these studs dramatically increase reliability & ease of maintenanc...

Our Billet Racing Cams add 20 peak horsepower and increased torque throughout the rpm range in your modified SHO engine. Made for us by Web Cam and precision ground to our specification from 8620 billet steel that is heat treated for maximum strength. Features added oil ports in cam lobe contact are...

Our overhead Valve Compression Tool allows easy removal of valve springs and keepers without removing cylinder head. Includes compression adapter to pressurize cylinder keeping valves in place during removal of stock springs and keepers. Fits both Yamaha 1.8L & Kawasaki 1.5L 4-stroke engines....

Calas Performance Yamaha set includes sixteen retainers that are manufactured with high quality military certified Titanium alloy and are CNC machined for a tight fit. Retainers are extremely strong, lightweight and wear resistant. Retainers are made to fit OEM factory valve spring set....

Intake Our race series valve is forged from an EV-8 alloy then heat treated and stress relieved with a solution style heat treat process for better control through and through. This process produces a better overall product with proper material grain flow that results in superior longevity & re...

Our Valve Retainer Upgrade Kit increases the reliability of your engine by reducing the possibility of valve float at high rpm. Includes 16 lightweight, precision-machined titanium valve retainers. A must for IJSBA & APBA Stock Class race craft and . Note: For highly modified engines we recommend...

Our Valve Train Upgrade Kits increase the reliability of your modified engine by reducing the possibility of valve float at high rpm. Includes lightweight, precision-machined titanium valve retainers, racing valve springs, and base washers....

Seat Pressure: 75 @34.7mm Open Pressure: 198 @ 10mm Max Lift: 15.70mm Coil Bind: 19mm Rate: 12.30mm Retainer: RET-YA3020 Seat Locator : SEAT-YA3020...

Press.Seat: 58lbs @34.70mm Press.Open: 143 @10mm Coil Bind: 20.70mm Max Lift: 14.00mm Retainer: RET-YA3020 Seat Locator : SEAT-YA3020...

Complete set of 16 valves Intake and Exhaust. Eight 29mm standard sized exhaust valves manufactured by Supertech & Set of 8 high performance 1 groove 34mm standard intake valves manufactured by SuperTech Intake Made exclusively from an enhanced versions of EV8 (21-4N) steel. This is the highes...

Complete set of 16 valves of Oversized Intake and Exhaust. Eight 30mm standard sized exhaust valves manufactured by Supertech & Set of 8 high performance 1 groove 35mm standard intake valves manufactured by SuperTech Intake Made exclusively from an enhanced versions of EV8 (21-4N) steel. This ...

Single (1) valve Exhaust 29mm standard sized exhaust valves manufactured by Supertech Exhaust Made from one piece, forged Inconel alloy, fully CNC machined, has a hard chrome treatment and a hard tip. Excellent for those looking to rebuild the cylinder head, or replacing bent valves, and w...

Single (1) valve Intake 34mm standard intake valves manufactured by SuperTech Intake Made exclusively from an enhanced versions of EV8 (21-4N) steel. This is the highest grade of steel available and provides the strength to withstand just about any application. Inconel is an alloy that cope ...

This is a standard size, single replacement exhaust valve from the RIVA Performance Valve set....

This is a +1mm oversize, single replacement intake valve from the RIVA Performance Valve set. (part# RY19040-HPV-1:1)...

This is a standard size, single replacement intake valve from the RIVA Performance Valve set....

RIVA High Performance Valves are engineered to improve reliability and performance in high-boost supercharged & turbocharged engines. Intake valves are built from high grade EV-8 (24-4N) stainless that is extremely resistant to corrosion. Exhaust valves are built from inconel alloy (IN-751) that is ...

RIVA High Performance Valves are engineered to improve reliability and performance in high-boost supercharged & turbocharged engines. Intake valves are built from high grade EV-8 (24-4N) stainless that is extremely resistant to corrosion. Exhaust valves are built from inconel alloy (IN-751) that is ...

RIVA Performance Valve Lifter Buckets are a "must have" item when upgrading your engine's valve train. Designed to withstand the stress of increased valve spring tension and RPM in modified engines that can cause stock components to fail. Our lightweight valve lifter buckets are CNC machined from he...

Our Yamaha Performance Valve Guides provide greatly improved durability for performance applications. A must for racing and high performance engine operation. Sold in sets of 16. Key Features: Constructed of Aluminum/Bronze/Nickle Alloy. Dramatically improves reliability in high boo...

Our high quality viton seals are extremely resistant to heat and abrasion. Metal body holds it's shape under extreme conditions. Spring loaded wipers keep unwanted oil from contaminating combustion chambers and prevent air leakage through valve guides. Precision seal removal & installation tool is a...

Set of factory Yamaha valve guides for cylinder head (16 total)...

Our Pro-Series Cylinder Head Gaskets were developed to withstand severe heat & pressure generated by high compression and high horsepower applications delivering maximum reliability to your racing engine. Key Benefits Include: Three layer stainless construction for durability & corrosion resis...

Our RIVA Yamaha 1.8L Pro-Series Cylinder Head Gaskets were developed to withstand severe heat & pressure generated by high-boost and high horsepower applications delivering maximum reliability to your racing engine. This 87mm head gasket was designed to work for applications with +1 sized pistons. ...

Our RIVA Yamaha 1.8L Pro-Series Cylinder Head Gaskets were developed to withstand severe heat & pressure generated by high-boost and high horsepower applications delivering maximum reliability to your racing engine. This 87mm head gasket was designed to work for applications with +1 sized pistons. ...

Bore: 88mm Thickness: 0.040"/1.0mm Cometic MLS Gaskets are comprised of multiple layers of stainless steel due to it's increased strength, ability to rebound and resistance to corrosion. Provide maximum sealing performance for today's high output engines and require no sealants. Ideal for...

Hot Cams shim kits enable you to precisely shim the valve train of your modified Yamaha or Kawasaki 4-stroke engine. Kits include three 9.48mm shims in each size ranging from 1.20 to 3.50 (increments of 0.05). Made from 4140 cold rolled steel....

Hot Cams shim kits enable you to precisely shim the valve train of your modified Yamaha or Kawasaki 4-stroke engine. Kits include three 9.48mm shims in each size ranging from 1.20 to 3.50 (increments of 0.05). Made from 4140 cold rolled steel....