2 replies to this topic
  • James_Dean

Posted June 15, 2000 - 08:56 AM


Can someone with a YZ426 tell me the carb needle number in your bike. The local Yamaha shop service manual said it is OBEKR but the parts department said it is OBEVR and has no part listing for an OBEKR. Which one is actually in the bike??
This is a factor in the difference of how the YZ426 runs versus the YZ400. The YZ400 uses a OBDVR and the YZ426 uses the OBE?R. The YZ426 gets more fuel at 2/3 throttle where the YZ400 runs lean ...
James Dean :)

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • Westside

Posted June 19, 2000 - 07:38 AM


These two bikes also use different carbs. (FCR right from a street bike) vs. (FCR2 YZ426 specific)

  • James_Dean

Posted June 19, 2000 - 08:33 AM


Yes, the carbs are different but the 426 is using the "standard" FCR street bike needle, whereas the all 400's are using a non-standard and leaner taper. This makes all the 400's have a weaker and more flat power in the midrange, including the '00WR400 with the FCR2!

Related Content


100 hrs on 2014 yz450f, shim valves or replace them? by ttr230rider6

Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • Hot  79 replies

Chubby dad, looking at bikes , First trip to the orange/black forum ! by Slow_ride

Dirt Bike   Make / Model Specific   KTM   250-530 EXC/MXC/SXC/XC-W/XCR-W (4-Strokes)
  • Hot  28 replies

2016 YZ450 by CaptainKnobby

Dirt Bike   Dirt Bike Technical Forums   Suspension
  • Hot  59 replies

Megabomb Fitment by 288yz450

Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • 1 reply

Thinking about Yamaha 250... by Arctic Pride

Dirt Bike   Special Interest Forums   Pro Racing
  • Hot  491 replies

Join Our Community!

Even if you don't want to post, registered members get access to tools that make finding & following the good stuff easier.

If you enjoyed reading about "" here in the ThumperTalk archive, you'll LOVE our community. Come join ThumperTalk today!

The views and opinions expressed on this page are strictly those of the author, and have not been reviewed or approved by ThumperTalk.