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RD Chain Guard Damper Kit - Fits all RD's, R5, DS7 & More see complete fitment below Kit Includes: Rubber Damper, Special Washer, Collar, Screw/washer See product detail for complete fitment
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Steering Damper Kit for Yamaha RD350, RD400 (76-78) RD250. Kit includes billet aluminum fork 34mm or 35mm clamp, steering damper & hardware for installation. Designed to reduce head shake, resistance adjustment for light to heavy damping. Easy installation. Note: This kit requires minor drilling or tapping of the reflector mount under the tank to accept the damper stud. Note: All RD's use the 34mm fork tube clamp accept the 1979 Daytona 400 which uses a 35mm clamp (natural finish). Choose model and click add to cart
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Elevate your style with the Yamaha Vintage 2-Stroke Twin Hat! This bold flat-bill cap features a striking red and black design, complete with an adjustable strap for a perfect fit. One size fits all—crafted for comfort and classic racing heritage.
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KHC Piston Kits (Sold each). Yamaha RD350/400/RZ350/RD350LC/RD350YPVS (all years). Budget friendly Piston kits include piston, rings, pin and clips. KHC pistons are made in Taiwan and the rings are Japanese, designed to meet or exceed OEM specifications. Available sizes are 64.5mm and 65.0mm only. Note: Use of these pistons in air cooled RD350/400 require modification of the piston skirt. We can perform this service for you. You can purchase the piston modification service here on the site under the piston category. Choose piston size, quantity and click add to cart.
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Yamaha RD400 HiFlo Air Filter Upgrade - This is the unbaffled Eruopean spec version of RD400 air filter. This can be used in the USA spec RD400 as a performace upgrade but we recommend jetting up to 27.5 pilot and 140 main jet for stock bike with stock pipes (links below). This is a branded (HIFLO) paper element filter true to the original. Pilot jets: Pilot Jets Main Jets: Main Jets
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New Stock Rotors/Discs: Newly manufactured brake rotor/disc for the Yamaha RD250, RD350, RD400, 265mm. Replaces 351-25831-01-00. Same cast iron as stock, same dimensions and specifications as stock rotor. Used Rotors/Discs - Drilled and Resurfaced: ECON PERFORMANCE RD rotors (sold each) for the Yamaha RD250, RD350, RD400. We first check the run out/thickness on these rotors to ensure they are not warped and within factory tolerance. The rotors are then completely resurfaced, cleaned, and drilled with a 45x8mm diagonal hole pattern. Sold as pictured - does not include carrier, bolts or tab washers. Note: These are used rotors and may have slight imperfections - but as always with EC - your satisfaction guaranteed. Note: EC offers a $40 credit for your rotor. We will issue the credit as a refund to your order when the rotor is received. Please email customerservice@economycycle.com after you place the order to let us know you intend to send in your rotor for credit. Note those streaks are simply reflections of light, the rotor has a consistent surface finish.
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Ceramic High Performance Brake Pads Yamaha - RD350 RD400 RD250. These ceramic brake pads are suitable for street or race use. Also fits TX500,TX650,TX750,XS650. Our Advanced Ceramic Brake Pads are engineered to provide exceptional performance and reliability for your motorcycle. Made from a high-quality ceramic compound, these brake pads offer superior stopping power, reduced heat buildup, and smoother engagement.
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Chain Adjusters. Pair (R/L) Includes L/R chian adjusters with bolt and nut. These are reproductions of the originals, great for restorations, true to the original finish. Replaces Yamaha part number 168-25389-00-00 which superseeds to 12R-25389-00-00. See fitment below / details
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Chain Adjusters. Pair (R/L) Includes L/R chian adjusters with bolt and nut. These are reproductions of the originals, great for restorations, true to the original finish. Replaces Yamaha part number 168-25389-00-00 which superseeds to 12R-25389-00-00 and 168-25388-00-00 which superseeds to 1A1-25389-00-00. See fitment below / details Fitment: YR1, YR2, YR3. 1967-1969 R5 / DS7 1970-1972 RD250 / RD350 1973-1975 RD400 1976-1978 1978 US version only
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Crossover Tube (for manifolds with female boost openings for crossover tube or boost bottle) in Black or Silver finish
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Exhaust flange Set for DG Expansion Chambers by DG, Sold in pairs with springs for the Yamaha RD350 (all years) and RD400 (1976-1978). Note: picture is RD400 flanges, RD350 flanges basically the same with slightly smaller diameter. Choose model and click add to cart.
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Dipstick O-ring Yamaha RD250/RD350/RD400 (all years). Buna O-ring, safe for motor oil and crankcase temperature.
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Disc/Rotor Lock Washer 90215-06106-00 Reproduction, sold each. Zinc plated. 8 required per disc/rotor
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Yamaha RD400 / RD250D Ignition Cover
- Replaces OEM number 1A0-15415-00-00, Fits on the original larger inner cover
- Reproduction Part, no longer available from Yamaha
- Cast Aluminum
- Applications: Yamaha RD400 1976- 1980 (all years worldwide) Yamaha RD250D, DX (Later Euro versions of the 250, **NOT FOR USA 250/350**)
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Sale!LED Headlight Bulb with Fan for RD's. There's not much clearance in the RD headlight buckets due to all the wires and makes fitting most LED ligths with fans difficult. And without the fan you can't get very bright lights. This compact H4 LED bulb and fan assembly fits nicely in the bucket and at 3,800 lumens is very bright. Note: This bulb is a replaceable H4 type. The original RD headlight was a sealed beam H4 type and the bulb was not replaceable. This bulb is primarly inteneded for use with an aftermarket headlight lens/bulb assembly.
- 3800 Lumens / 1 Amp draw
- Ultra white color
- Built in auto fan
- Installs in minutes - Plug and Play, this compact bulb assembly fits in the RD headlight bucket
- Lifetime warranty
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Out of stockMagnetic Oil Drain Plug for RD's/R5/DS7/RZ350. Also fits most Yamaha motorcycle from the 60's through the mid 80's. Magnetic oil drain plug collects metal particles and debris protecting your engine from damage. Includes washer. M14 x 1.5 (pitch) x 15mm long (threaded portion of bolt and magnetic tip).
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Metal Quick Disconnect Fuel Coupling with dual shutoff in 3/16", 1/4" or 5/16". When connected fuel will flow & when disconnected fuel will not flow from either side. Use Dual shut-off for fuel tanks equipped with a cross-over line. Feature stainless springs, pin, and latch. These quick disconnect fittings utilize Viton o-rings and may not be compatible with some race fuels. Choose size and click add to cart.
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Mikuni Vent Tube Anchor Plate - This part attaches to the float bowl screws and holds the vent line. 2 Required per carb.
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Mikuni Choke Lever Conversion Kit. For Mikuni VM Carburetors, converts choke from lever style to cable. Cable not included. Order 1 per carb. Mikuni part VMCK/FMK-412
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Mikuni Choke Lever Conversion Kit. For Mikuni VM Carburetors, converts choke from lever style to plunger. Order 1 per carb. Mikuni part TM38/57
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Motorcycle Related Stickers - Variety 100 pack. Huge variety pack of various motorcylcle related brands, Yamaha, AGV, Bell, AMA, Aria, Simpson, K&N & dozens of others. Easy to paste and remove. Made from PVC.
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Oil Injection Line Clip, 90468-02033-00 OEM Originals $6.99 each or Reproduction Clips - $1.95 each
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Oil Pump Check Valve Nozzle - RD250/350/400/R5/DS. This is the nozzle on the pump (not the carb) that delivers 2 stroke oil to the oil line going to the carburetor. This part is fitted with a small spring and ball bearing to complete the check vavle. Each bike/pump has 2 of these.
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RD250/350/400 Carburetor Clamp (carb to manifold). This is a high quality alternative to the expensive Yamaha part (17.50), secures carb to manifold. Sold each. Note: The finish on these is yellow/brass, very different from the original olive drab color clamps but they perform just fine at much less cost. The original Yamaha part number was 90460-43053-00, superceded to 90460-43179-00.
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RD400 Exhaust Joint - 2R9 Type (Non-USA, larger diameter) - SOLD EACH. Reproduction part replaces 2R9-14615-00
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RD400F Daytona Front/Rear Caliper O-ring, Reproduction Part, sold in pairs, replaces 2G2-W0044-00-00 (no longer available from Yamaha. Buna O-ring.
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Throttle Cable for Larger Carbs and Stock Throttle Housing w/o Oil Pump Line (VM's, TM's, Keihin, PWK). Built in adjusters allow a wide range of applications. Works with the following carburetors: Mikuni VM Round slides 30, 32, 34, 36, and 44mm Mikuni TM Flat slides 28, 32, 34, 36, and 38mm Keihin PWK 28, 33, 35, 36mm
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Throttle Cable for Larger Carbs and Stock Throttle Housing with Oil Pump Line (VM's, TM's, Keihin, PWK). Built in adjusters allow a wide range of applications. Works with the following carburetors: Mikuni VM Round slides 30, 32, 34, 36, and 44mm Mikuni TM Flat slides 28, 32, 34, 36, and 38mm Keihin PWK 28, 33, 35, 36mm
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Throttle Grip Washer (goes between throttle and switch housing). Can be used with all RD's R5's DS6/7 & most bikes with standard 7/8" Grips. Part no. 90201-261L1, washer plate These are often missing causing the throttle to return slowly or not all.
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Yamaha CS5 - Carb to Airbox Intake Boots - Pair 337-14453-00-00 reproduction (sold in pairs)
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Yamaha RD Seat Document Holder Latch. Reproduction Part no longer available from Yamaha. Note: Completly remove the old latch from the document flap and the retainer from the seat pan. Fitment: Yamaha RD250, RD350 1973-1975. (note early Yamaha RD350's did not have the document holder) Yamaha RD 400 All Note this Document Holder / Latch was used on many Yamahas of the era.
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Yamaha RD Seat Document Holder with Latch. Reproduction Part no longer available from Yamaha. Note: Completly remove the old latch from the document flap and the retainer from the seat pan. Fitment: Yamaha RD250, RD350 1973-1975. (note early Yamaha RD350's did not have the document holder) Yamaha RD 400 All Note this Document Holder / Latch was used on many Yamahas of the era.
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Yamaha RD, XS,TX,TZ Brake Caliper Pistons - pair Reproduction Caliper Pistons Made from stainless steel 48mm x 17.15mm Set of 2 pistons, for one caliper
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RD/RZ/R5/DS6/7 Clutch Cush Drive. 8-pack kit, enough to do one clutch.
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RD/RZ/R5/DS6/7 Clutch Cush Drive, by Hinson. 8-pack kit, enough to do one clutch.
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Yamaha RD250/350/400/R5/DS7 Fork Bolt & Copper Gasket Reproduction 3D8-23181-00-00 & 509-23158-L0-00
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Yamaha RD350 Y-Boot Clamp 90460-77016-00. This is the clamp that secures the Y-boot to the bottom of the air filter box or Y-boot air filter set up. No longer available from Yamaha, this is a reproduction part and is a yellow-ish gold color. Replaces Yamaha OEM part number 90460-77016-00
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Yamaha RD400 (All Years) Foot Peg Clevis Pin Set. 8mm x 34 pin, zinc plated steel, w/cotter pins. (sold as a set of 2 pins/cotter pins). Replaces 90243-08006-00.
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Sale!Economy Cycle Clutch Kit - Great stock replacement clutch for RD400, RZ350 or Banshee. Includes 7 friction plates, 6 steel plates and 6 springs. Springs are 10% over stock lever pull, provides stronger pressure on the plates without being overly stiff and hard on the hand and wrist. This clutch is intended to provide value for stock or slightly modified bikes and should last as long as the OEM clutch under normal street riding conditions. If you have a built up engine, ride aggressively or intend to go racing, see our other high quality heavy duty clutch kits and options. Includes installation instructions.
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Yamaha RD400 Tail Light Base 1A0-84712-60 Sheet, Base. This rubber part goes between the bracket and light. Reproduction part no longer available from Yamaha.
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Yamaha RD400F Daytona Fork Seal 1T3-23145-00-00. OEM Yamaha, sold each.
