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Mikuni 34mm TM Flat Slide Carburetor. Square type slide carburetors have increased air flow metering at low engine speeds and the smooth bore design reduces turbulence in the carburetor throat for better response and power delivery throughout the rev range. TM Series bodies are designed to accept Power Jet Kits, which prevent leaning out in 2 strokes during extended full throttle running. Provisions to include Power Jet on 38mm, but power jet can be added to any size flat slide 30mm and above with some modification. Click on picture for larger pictures and jetting specs.
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Mikuni 36mm TM Flat Slide Carburetor. Square type slide carburetors have increased air flow metering at low engine speeds and the smooth bore design reduces turbulence in the carburetor throat for better response and power delivery throughout the rev range. TM Series bodies are designed to accept Power Jet Kits, which prevent leaning out in 2 strokes during extended full throttle running. Provisions to include Power Jet on 38mm, but power jet can be added to any size flat slide 30mm and above with some modification. Click on picture for larger pictures and jetting specs.
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Mikuni 38mm TM Flat Slide Carburetor. Square type slide carburetors have increased air flow metering at low engine speeds and the smooth bore design reduces turbulence in the carburetor throat for better response and power delivery throughout the rev range. TM Series bodies are designed to accept Power Jet Kits, which prevent leaning out in 2 strokes during extended full throttle running. Provisions to include Power Jet on 38mm, but power jet can be added to any size flat slide 30mm and above with some modification. Click on picture for larger pictures and jetting specs.
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Genuine Mikuni Air Jets - Choose size and quantity, then click add to cart
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A handy pocket-size slide calculator which can be used to determine required jetting changes in Mikuni Carburetors due to climate and temperature changes. The Pocket Tuner is applicable to both single and multi-carburetor applications on two-stroke and four-stroke engines. It also has a guide for determining rich or lean carburetor conditions.
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Out of stockMikuni Carburetor Tuning Manual. Includes complete parts list, functions, maintenance, troubleshooting and parts selection for Mikuni carburetors.
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Genuine Mikuni Jet Needles. Choose needle number and quantity, then click add to cart
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Genunin Mikuni Needle Jet Bleed Type, choose needle number and quanity, then click add to cart
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Genuine Mikuni Needle Jets Primary type, choose needle number and quantity, the click add to cart
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Genuine Mikuni Needle Valve Assembly for R5/DS6/DS7. Includes float needle, seat & washer. Metal tip float needle.
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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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Genuine Mikuni Viton Tip Needle Valve Assembly for RD250/350/400/R5/DS7 & all VM(24-30mm) Carb. Includes Viton tip float needle, float valve seat, does not include washer, available separately. Sold each.
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Mikuni VM - Air Jet (tap and die) - Convert your pressed in VM air jet to removable type. This kit is also good for chasing/repairing pilot jet thread.
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Genuine Mikuni Pilot Jets for VM, TM & TMX carbs. Sold each. Choose jet size than quantity, then click add to cart
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Mikuni VM Round Slide Series 28mm Carburetor. These are the most popular high performance single carburetors in the sport of motorcycling. Mikuni's VM Series round slide single carburetors have proven themselves as the performance standard for use in any single cylinder motorcycle and ATV applications for motocross, enduro and trail riding, to flat track racing and road racing on both 2-stroke and 4-stroke engines. Performance features for the VM Series Carburetors include a large selection of bore sizes for increased fuel mixture flow to match engine modifications. And the VM Series offers a wide range of tuning components to allow precise fuel mixture metering in any application, at any throttle setting, under any riding conditions. Click on picture for larger picture and jetting specs. Note: This carb is the way it comes from Mikuni, not jetted for RD's, no oil injection, mikuni makes these for single cylinder dirt bikes and is the left hand version of the carbs. If you need bolt on carbs for your rd see here VM28 Carburetors for the RD's
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Mikuni VM Round Slide Series 30mm Carburetor. These are the most popular high performance single carburetors in the sport of motorcycling. Mikuni's VM Series round slide single carburetors have proven themselves as the performance standard for use in any single cylinder motorcycle and ATV applications for motocross, enduro and trail riding, to flat track racing and road racing on both 2-stroke and 4-stroke engines. Performance features for the VM Series Carburetors include a large selection of bore sizes for increased fuel mixture flow to match engine modifications. And the VM Series offers a wide range of tuning components to allow precise fuel mixture metering in any application, at any throttle setting, under any riding conditions. Click on picture for larger picture and jetting specs.
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Mikuni VM Round Slide Series 34mm Carburetor. These are the most popular high performance single carburetors in the sport of motorcycling. Mikuni's VM Series round slide single carburetors have proven themselves as the performance standard for use in any single cylinder motorcycle and ATV applications for motocross, enduro and trail riding, to flat track racing and road racing on both 2-stroke and 4-stroke engines. Performance features for the VM Series Carburetors include a large selection of bore sizes for increased fuel mixture flow to match engine modifications. And the VM Series offers a wide range of tuning components to allow precise fuel mixture metering in any application, at any throttle setting, under any riding conditions. Click on picture for larger picture and jetting specs.
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Mikuni VM Round Slide Series 36mm Carburetor. These are the most popular high performance single carburetors in the sport of motorcycling. Mikuni's VM Series round slide single carburetors have proven themselves as the performance standard for use in any single cylinder motorcycle and ATV applications for motocross, enduro and trail riding, to flat track racing and road racing on both 2-stroke and 4-stroke engines. Performance features for the VM Series Carburetors include a large selection of bore sizes for increased fuel mixture flow to match engine modifications. And the VM Series offers a wide range of tuning components to allow precise fuel mixture metering in any application, at any throttle setting, under any riding conditions. Click on picture for larger picture and jetting specs.
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Mikuni VM Round Slide Series 38mm Carburetor. These are the most popular high performance single carburetors in the sport of motorcycling. Mikuni's VM Series round slide single carburetors have proven themselves as the performance standard for use in any single cylinder motorcycle and ATV applications for motocross, enduro and trail riding, to flat track racing and road racing on both 2-stroke and 4-stroke engines. Performance features for the VM Series Carburetors include a large selection of bore sizes for increased fuel mixture flow to match engine modifications. And the VM Series offers a wide range of tuning components to allow precise fuel mixture metering in any application, at any throttle setting, under any riding conditions. Click on picture for larger picture and jetting specs.
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Mikuni VM Round Slide Series 32mm Carburetor. Right Idle Screw.
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Mikuni VM Round Slide Series 32mm Carburetor. Left Idle Screw.
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Mikuni Power Jet Kit. Prevents leaning out during extended full throttle runs. Enables you to convert your size 30mm-44mm VM/TM carburetor to a Power Jet Carburetor. Comes complete with all parts needed to complete the conversion. Instructions included.
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Mirror - Yamaha RD400 RD250/350LC Replacement Mirror Left hand. Perfect match in fit & finish, just like the original sans the Yamaha Logo. Also available Right hand & sold in pairs
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Mirror - Yamaha RD400 RD250/350LC Replacement Mirror Right hand. Perfect match in fit & finish, just like the original sans the Yamaha Logo. Also available Left hand & sold in pairs
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Mirror Adapters (for use with our Yamaha RD350 reproduction Master Cylinders). Available in black or chrome. This is a mirror stem adapter, 10mm right hand to 10mm left hand. Sold each. Choose color and add to cart.
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Mirrors - Yamaha RD400 RD250/350LC Replacement Mirrors - Pair. Perfect match in fit & finish, just like the original sans the Yamaha Logo. Also available separately RH, LH
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Engine Oil Seal Kit for Yamaha R5/DS7. High quality seal kit, includes all seals for bottom end. By Mocom, high quality aftermarket seals. This kit includes includes 7 seals. (click on the picture for seal identification)
- Countershaft Sprocket Seal
- Crankshaft RH
- Crankshaft LH
- Kickstarter Shaft
- Shift Shaft (crankcase)
- Clutch Push Rod
- Oil Pump Note: Shifter fork shaft plugs (2 required) are not included in this kit but are available separately here on the site in the seals category.
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Engine Oil Seal Kit for Yamaha RD400/350/250. High quality seal kit, includes all seals for bottom end. By Mocom, high quality aftermarket seals. This kit includes includes 8 seals. (click on the picture for seal identification)
- Countershaft Sprocket Seal
- Crankshaft RH
- Crankshaft LH
- Kickstarter Shaft
- Shift Shaft (crankcase)
- Shift Shaft (outer cover)
- Clutch Push Rod
- 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.
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Long-filament fiberglass made especially for 2 stroke muffler packing, suitable for aftermarket expansion chambers, Measures 10.5" x 16", more than enough to repack virtually any 2-stroke silencer. Resists breakdown up to 1200 degrees F. Made in the U.S.A.
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Manifolds for 30-34mm Carbs(VM, TM, PWK, PJ) with Boost/Crossover holes. By Moose Racing, high quality material resistant to cracking or ripping, outperforms stock manifolds. Specifically formulated to resist harsh fuels (including methanol) and oils. Carb side opening i.d. accomodates 40mm carb spigot. Includes manifold gaskets & clamps. (recommended for use with larger 34mm carbs on RD350/400 or RZ350 applications). Perfect for use with boost bottle.
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Timing kit for inspection and adjustment of ignition timing; gauge face size 1 1/2". Comes with adapter for air-cooled 2 strokes. Although this is an excellent gauge, we do not recommend it for the RD250/350/400/R5/DS7 as there isn't enough clearance to use the gauge with the engine installed in the frame. For the RD250/350/400/R5/DS7 or any bike with minimal clearance between the frame and spark plug, we recommend the Economy Cycle Dial Gauge made specifically for RD and Yamaha twins, which can be found here Economy Cycle Dial Gauge
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For use when tuning a motorcycle with the gas tank removed. Includes 4Í of 1/4î fuel line and an in-line fuel petcock. Holds up to 2,000cc or 1/2 gallon of fluid.
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Jumper cables made specifically for motorcycle and powersports use.
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Motorcycle LED Mulit-function Brake/Running/License Tail light. 34 LED tail lights, 2 LED license plate lights.
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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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Genuine Mikuni Float Needle Valve Seat Washer for RD250/350/400/R5/DS7 & all VM(24-30mm) Carbs. Sold each.
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Neutral Switch Wire Grommet. Reproduction part, no longer available from Yamaha. Sold each.
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Need a solution for your original RD Headlight? We have one with a replaceable H4 Halogen Bulb. Click on details below and scroll down to descprition.
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NGK Iridium Spark Plug. The ultimate in the evolution of spark plug technology and performance from the industry leader. The iridium electrode is 25% smaller than a platinum electrode, and it’s just 1/4 the size of a conventional nickel electrode. Ultra-small-diameter center electrode reduces voltage requirement and extends ignition system life. New metal shell plating has enhanced anticorrosion qualities. BR8EIX Stock for RD400, BR8HIX stock for RD350. Choose spark plug, quantity and click add to cart.
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***NOTE*** Most non-resistor type spark plugs (B8HS, B8ES) have been discontinued by NGK, you can substitute resistor type spark plugs (BR8HS, BR8ES) without issue). The NGK Standard Spark Plug is manufactured to enhance the performance of the vehicle. It is constructed from durable material that is corrosion and abrasion resistant. The Spark plug insulators are made of 99 percent pure alumina silicate, allowing for longer insulator noses for reduced fouling. This Spark plug features a triple gasket sealing process that eliminates fuel leakage. It also includes a solid copper core that provides superior heat dissipation and conductivity. This Spark plug has resistor that is produced with a glass and carbon mixture, which is fired to ensure superior performance and durability. It has corrugated ribs that prevent flash over and cold rolled threads to inhibit damage to the cylinder head. Choose spark plug and click add to cart.
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These O-rings are for RD350/400 heads that have been modified to accept O-rings (by Economy Cycle, SCR (Scott Clough Racing, or new DG heads. Sold each. Sample picture, color may vary. Sold each. Multiple sizes: #40 for modified stock heads #40 for Superior heads #39 for DG Heads
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Oil Drain Plug Gasket - RD250/350/400/R5/DS7. Aftermarket part, thick fiber gasket similar to OEM but at a reasonable price. Sold each, or packs of 5 or 10. Replaces Yamaha OEM part no. 4F4-14766-00-00
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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 lines grommet. Reproduction part no longer available from Yamaha. This part fits into the top of the engine cover and the oil feed/supply lines pass through it. Sold each.
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Yamaha RD350/400/250/R5/DS7 Oil Pump Grommet Blank. This is a solid plug with no openings for oil lines and is intended to be used on bikes that premix and do not use the oil pump or oil lines.
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Yamaha RD350/400/250/R5/DS7 Oil Pump Block Off Plate Kit. Kit includes:
- CNC aluminum block off plate
- Yamaha oil pump gasket
- Replacement engine case grommet block (solid, no openings for oil lines)
- Stainless steel allen bolts and lock washers
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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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Oil Pump Housing Main Gaket - Yamaha RD350 RD400 RD250 R5 DS6/7 RZ350, sold each.
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Oil Pump Rebuild Kit RD250/350/400 R5/LC350/YDS6/7 & Most Yamaha Oil Pumps from the 60's,70's & 80's Comprehensive kit - includes seals, gaskets, and screws. Covers most vintage Yamaha Motorcycle Oil Pumps from the 60's,70's and 80's Includes the following seals: Main, Priming wheel, Shaft, Piston (includes 3 sizes) Indludes the following gaskets: Main Pump Body, Pump to Case, and Bleed screw Includes new proper JIS (Japanese Industrial Standard) screws for pump body and bleed screw Includes Economy Cycle Oil Pump Rebuild Guide Not Included: Plug for pumps without a priming wheel (later 400's & RZ350) These rarely need replacing, the rest of the kit will work with these type pumps Satisfaction guaranteed or your money back One year warranty against manufacturing defects
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Oil Pump Rebuild Service includes the following:
- Pump completely disassembled & checked for wear
- Pump body and parts ultrasonically cleaned
- Pump body media / vapor blasted if needed
- Replacement of all seals/gaskets and check valve springs
- Reassemble pump and calibrate (shim) to spec
- Approximate turn around time - 2-3 weeks
