Question about 2000 Yamaha WR 400 F

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Size in msize in mm of a yamahm of a yamaha wr400 standard piston

Size in mm of a yamaha wr400 standard piston

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92x60.1
12.5 to 1 comp

Posted on Jan 02, 2009

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Wr400 yamaha runs but stalls


Check the carb. If it bogs, it could be running lean. If it stalls, it could be an electrical issue. For the carb if it is stock I would recommend a jet kit.
JD Jetting Dirt Bike Jet Kits

Dec 10, 2011 | 2000 Yamaha WR 400 F

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I HAVE JUST BOUGHT A '92 MODEL XT600 AND i WANT TO PUT THE BIGGEST "BIG BORE KIT " IN IT WHAT SIZE CAN IT TAKE? AND WHERE CAN i PURCHASE ONE FOR BEST PRICE?


Stock bore is 95 mm, Wiseco offers a 101 mm piston, some crankcase cleanup is required. Will be 672 cc monster when you're done. Actually am building one right now for a supermoto screamer. Good luck!

Jun 11, 2011 | 1990 Yamaha XT 600 E

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2001 ultra classic tire size


Specifications: Engine Type: 1449 cc, 4-Stroke, Air Cooled, V-Twin
Engine Bore and Stroke: 95.3 mm x 101.6 mm
Valves 2 valves/cylinder
Claimed Horsepower: 67 hp (50 kW) @ 5200 rpm
Maximum Torque: 110 Nm (81.1 ft. lbs) @ 3100 rpm
Transmission type: 5 speed
Final Drive: Belt

Tire - Front: 130/90-16
Tire - Rear: 130/90-16

Brakes - Front: dual 292 mm discs with 4-piston calipers
Brakes - Rear: single 292 mm disc with 4-piston calipers

Sizes can vary depending on what has been done to the bike.
Ride safe and loud pipes save lives.

Dec 14, 2010 | 2001 Harley Davidson FLHTCUI Electra Glide...

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What oil can you use for a wr400, 2000 model?


I use a synthetic 10w40 in mine. Amsoil is expensive, but I would rather change oil, than a piston. I race in the woods, and change my oil and filter every three hours of runing time. You can go longer for milder riding such as every 5 to 6 hours. Yamaha also sells a good oil, synthetic, and semi-synthetic.

Sep 18, 2010 | 2000 Yamaha WR 400 F

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Yamaha 1998 wr400 dirtbike clutch dragging.


What oil are you runing I like to run a Rotellat 15W-40

Jul 12, 2009 | Yamaha WR 400 F Motorcycles

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Max size of cylinder


The biggest bore would be 1mm over.The standard bore on that bike is 65.0mm
so you could bore up to 66mm and to be a 900cc you would need a bore size of 68.5 mm
So your answers
  1. Yes, it can be bored
  2. No,Not to a 900cc
  3. Piston size is 66mm (making it roughly an 843cc)
I Hope this has answered all your questions,But please feel free to ask any more if needed.

Please take time to rate this fixya

Mar 18, 2009 | 1985 Yamaha XJ 700 X Maxim

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