yz400f high reving, now doesnt start

3 replies to this topic
  • holeshot296

Posted September 20, 2005 - 09:35 PM


I have a 99 yz400f, Last time I rode it it started high reving, I hit the kill switch and now it won't start. I've checked the spark plug and I have a sparks.

Also when I try to kick it over sometimes (about 1 in 10) the kick starter stops with a couple of inches to go.

Anyone got any ideas.

  • Daz_426_02

Posted September 21, 2005 - 03:20 AM


Might be a stupid response but have you got fuel in it? it will normally rev higher just as its running out of gas because the air/fuel mixture changes with more air than fuel.

As for the kickstarter sticking... not too sure about that one. Best thing to do is whip the valve cover off and just double check the valve clearance, its more than likely a kickstarter return spring or something like that but its worth just checking the valve clearance as its fairly quick to do and gives you peace of mind...

good luck. Where about in the UK are you?

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

Posted September 21, 2005 - 05:15 AM


Check the carb slide for integrity. If the slide is cracked/broken, high idle can be the result. If a piece broke off and found its way into the head, bad news. I would definitely find what is causing the binding before trying to kcik the motor over.

  • holeshot296

Posted September 21, 2005 - 09:33 AM


I am in leicester....Thanks for that. I was low on fuel, I've filled her up but she just won't fire I am going to have another go tonight.

Related Content

WR Camshaft Swap Info - last post by jamesm113

WR Camshaft Swap Info

  • 0 replies

yz400f throttle bog by yz400fmaniac

Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • * * * * *
  • Hot  28 replies

YZ450F 03 Sparks driving me crazy by SirAttard

Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • 5 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

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.