2008 450 rough mid range

2 replies to this topic
  • dboy1k

Posted February 05, 2012 - 07:58 AM


as most of you have seen and helped with some of my questions on here i still can not get rid of the rough midrange on this bike.
i rode another 2008 yz450 yesturday and it did the same crap!
is this normal on these bikes to be choppy at a steady throttle?
if so this bike is going up for sell fast!

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • grayracer513

Posted February 05, 2012 - 09:38 AM


If the "choppy" behavior is steady and regular, like when you forget to push the choke off, try lowering the needle one spot, and/or turning in the pilot screw a half turn to see what happens. If it's irregular and erratic, raise the needle one and/or turn the pilot screw out a half. You may need an alternate needle to fix it.

Another thing you can try if the carb doesn't give you any results is to test the TPS for correct adjustment and correct that as necessary. You can also simply disconnect it and run it that way. If it cures the problem, you can leave it like that, but it's sort of a "band-aid" repair.

  • dboy1k

Posted February 05, 2012 - 01:42 PM


Ya iv tryed all of that with no luck.
Im going to order a new stator tomorrow and try it.
Iv tryed everything else but the stator.
It's very consistent like electrical issues.
And iv put a new carb cdi and coil and none of them changed it a bit

Related Content


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

Snake pit oct 30th by The Anvil

Dirt Bike   Dirt Bike Regional Discussion   California
  • Hot  293 replies

2016 YZ450 by CaptainKnobby

Dirt Bike   Dirt Bike Technical Forums   Suspension
  • Hot  59 replies

05 yz450f not fast enough by RedeyeYZ

Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • Hot  38 replies

Wilson the Blue Privateer by jetfuel

Dirt Bike   Special Interest Forums   Pro Racing
  • Hot  50 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.