YZ400F/YZ426F Hard to start

No replies to this topic
  • AFelix

Posted January 28, 2015 - 12:41 PM


I have read counless post regarding dificulty starting the YZ400f and 426f's.


This is just a review of what helped mine.


I have a 99 YZ400f, and when she is cold, it would take 12+ rounds to get her started, once warmed up, she would fire 1st or 2nd kick. I switched to the iridum plug, and now she fires on about the 3rd or 4th round when dead cold. That one change was a god send to me.


Obviouly, this will not solve carb related issues, but I would suggest the iridium plug in all casses.

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

BIGBORE FOR YZ450F 2006? by Taattie94

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

2016 YZ450 by CaptainKnobby

Dirt Bike   Dirt Bike Technical Forums   Suspension
  • Hot  59 replies

Snake pit oct 30th by The Anvil

Dirt Bike   Dirt Bike Regional Discussion   California
  • Hot  293 replies

The "going back to the other darkside" adventure... by Monk

Dirt Bike   Make / Model Specific   KTM   250/350/450/505 SX-F & XC-F (4-Strokes)
  • Hot  113 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.