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Complete engine gasket set for Yamaha RD400 (1976-78) by Athena. Gasket set includes the following: Head gasket x 2 Base gasket x 2 Exhaust gaskets x 2 Right Crankcase cover gasket x 1 Oil pump cover gasket x 1 Clutch actuator cover gasket x 1 Points cover gasket x 1 Note: Does not include reed cage gaskets -
Oil Seal Kit for Yamaha RD400/350/250/R5DS7. High quality seal kit, includes all seals for bottom end. Seals are by Sudco/ARS, OEM quality manufacturer. This kit includes includes 9 seals. These seals appear nearly identical to Yamaha OEM seals. (click on the picture for seal identification)- Countershaft Sprocket Seal
- Crankshaft RH
- Crankshaft LH
- Kickstarter Shaft
- Shif Shaft (crankcase)
- Shift Shaft (outer cover)
- Clutch Push Rod
- Oil Pump
- Oil Pump Note: Shifter fork shaft plugs and the special O-ring crank seal are not included in this kit but are available separately here on the site in the seals category. Note: The RH crankshaft seal for the R5 is no longer available, however the seal in this kit can be used by simply removing the raised rubber lip as there is no groove in the R5 case for it.
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LIMITED AVAILABILITY - 1 Set Remaining Superior Heads RD400 - Toroidal Chamber Design, O-ring Gaskets, Sandcast - In Stock Sorry no 350 heads available. Now with polished combustion chambers! Features:- Toridial Cubustion Chamber Design by Road Racing Engineer Wayne "Wobbly" Wright and world record holder for the fastest RD, Ed Erlenbach. Toridial heads give you more peak power, help prevent detonation and a torodial chamber not only reduces the distance the flame front has to travel but it promotes turbulence in the chamber, speeding and increasing combustion efficiency. Increased efficiency increases power in itself, but probably equally as good is the fact that the increased efficiency of the design also lets us safely raise the compression higher and dial in more ignition advance safely as well.
- Dyno testing has shown HP increases across the rev range. The RD400 we dyno'd showed a 6HP increase.
- Heads use a reuseable O-ring gasket
- Sandcast in aluminum A356, aids in cooling and give the heads an old school look
- Updated fin design aids in cooling
- Made in the USA
- Polished combustion chambers
- 12.3 CR
- 23.7 Chamber volume
Note: These heads ship direct from the manufacturer in special packaging. The charge for shipping is $25 and will be added at checkout
Note: This item is not eligible for discount or coupons
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Genuine Yamaha Parts - Kickstarter rebuild kit for Yamaha RD250/350/400/R5/RZ350/DS7 (all years). Tired of your kickstarter swinging out while you're riding? This kit contains all the parts you need to fix that problem and is easy to install. New spring, steel ball, washer and criclip. -
Yamaha Kickstarter (Reproduction) for RD250/350/400/R5 DS6/7 & XS. New chrome kickstarter assembly, includes kicker and boss. -
Yamaha RD400 Engine Mount Damper Kit 1976-1979 - Reproduction. Includes the following: 1A1-15316-00-00 x 4 1A1-15326-00-00 x 2 1A1-15336-00-00 x 2 93210-11073-00 x 4 -
Complete engine gasket set for Yamaha RD250/350/R5 (all years) by Athena. Note: RD250 requires different head gaskets, also sold here on the site. Gasket set includes the following: Head gasket x 2 Base gasket x 2 Manifold (reed cage) gaskets x 2 Exhaust gaskets x 2 Right Crankcase cover gasket x 1 -
Barnett Clutch Kit Yamaha R5 (all), includes 7 Kevlar friction plates, 6 steel drive plates, 6 heavy duty springs. High performance clutch kit for the Yamaha R5. -
Barnett Clutch Kit Yamaha RD350 RD250 (all), includes 7 Kevlar friction plates, 6 steel drive plates (7 for 250), 6 heavy duty springs. High performance clutch kit for the Yamaha RD350.
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Barnett Clutch Kit Yamaha RD400 (76-79), includes 7 Kevlar friction plates, 6 steel drive plates, 6 heavy duty springs. High performance clutch kit for the Yamaha RD400.
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Black plastic bolt head cap covers for metric socket head (allen) in sizes M8 or M6. Makes for a nice clean look. Sold each. These simply press in to the bolt head, easy to remove. note; Size M8 (for RZ handlebar risers and other M8 Allen head bolts), Size M6 (for RD/RZ engine case bolts and other M6 allen head head bolts) -
Clutch Holding Tool by Motion Pro. Made from medium carbon steel with hardened jaws to hold clutch hubs, flywheels, gears, sprockets, etc. Features 8mm spanner pins, Jaws open up to 5 inches wide, Recommended for square tooth style clutch hubs. -
Clutch Push Rod - Yamaha RD250/350/400/R5/DS7. Choose model and click add to cart. RD250/350/400/R5/DS7
RD400
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Clutch Push Rod Ball - All RD's, R5, DS6/7 -
Crankcase Breather - Yamaha RD250/350/400/R5/RZ350. Orignial Yamaha OEM part no. 583-15371-00-00 -
Crankcase Breather - Yamaha RD250/350/400/R5/RZ350. Reproduction part replaces Yamaha part no. 583-15371-00-00 -
DG Expansion Chambers Performance Exhausut for RD350 All Years and RD400 1976-1978. 13+/- hp increase, 10 pound weight reduction and bolt on easily. Steel construciton. Requires re-jetting of carburetors and new exhaust gaskets. Jets and exhaust gaskets are available here on the website. -
EBC Clutch Friction Disc Set for Yamaha Yamaha RD250/350/400, R5, DS6/7, RZ. Includes 7 friction discs.Cork-based clutch material impregnated with aluminum particles to increase wear life and heat resistance. Highly compressed construction avoids swell and clutch drag, Ideal for general-purpose street performance. -
EBC Clutch Kit for RD400 & RZ350. Includes steel plates, friction plates and springs. Featuring anti-swell friction plates, long lasting pin planished steel plates for better lube distribution and heavy duty clutch springs. -
EBC Heavy Duty Clutch Spring Kit for Yamaha RD250/RD350/R5/DS7. Set of 6 springs. -
ECON PERFORMANCE Heavy Duty Clutch Kit for the RD350/400/R5. Kit includes high performance FZR friction plates with wider friction face, Yamaha OEM steel plates, and heavy duty high performance clutch springs. This kit significantly upgrades the stock clutch and is suitable for long lasting street performance or high output racing engines. Unlike the Barnett, the lever pull with this kit isn't too stiff and is similar to stock, yet still provides maximum holding power. Easy installation, includes instructions. Note: You'll probably want to pick up a new clutch cover gasket to go with the kit, also sold here on the site in the gasket section. Note: RD400 Kit pictured. Note: The stock rubber cushion rings are not required with this clutch. Choose model then Click add to cart. -
Exhaust springs by Moose Racing. Suitable for aftermarket exhaust / expansion chambers. Stainless Steel, sold in pairs. Available in multiple lenths (measurement is from hook to hook) 90MM fits most Yamaha RD/RZ applications. Choose length and click add to cart -
Fuel/Vent/Oil Line 1/8" id x 5' - Clear or Black. Polyurethene line can be used for fuel, oil or vent line. Sold in 1/8" (id)diameter x 5 feet, in clear or black. Does not harden or crack. Choose color and click add to cart. -
2 Stroke Oil Injector Nozzle - RD250/350/400 (carb oil injector nozzle). Economy Cycle reproduction item, no longer available from Yamaha. Sold each. -
***Note: We cannot ship Lomas exhausts to Europe. To purchase Lomas pipes for Europe, please visit JL-exhausts.com***
JL (Jim Lomas) Expansion Chambers - Yamaha R5/RD350/76-77 RD400. Simply put, JL chambers are the best pipes available for your air cooled RD or R5. Available in mild steel or stainless steel with stainless or carbon fiber silencers. Excellent performance across the rev range and high quality craftsmanship, you won't be disappointed!
Mild Steel with Stainless Steel Silencers $734.95 - LSR103
Mild Steel with Cabon Fiber Silencers $854.95 - LSR104
Stainless Steel with Stainless Steel Silencers $919.95 - LSR105
Stainless Steel with Carbon Fiber Silencers $1,042.95 - LSR106
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