02 426 problems

2 replies to this topic
  • twoYZ426Fs

Posted June 19, 2009 - 10:05 AM


I just bought an 2002 426 from a guy for $800. It was a great deal in my opinion. When he started it up, it was spitting and sputtering/backfiring, and about 15 seconds after it was started, the exhaust pipe coming from the jug was red hot. It wasnt just discolored either. I was wondering if anyone had any suggestions on where I should start with fixing the problems. Heck, does anyone know what the problem might be?

Thanks in Advance,

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

Posted June 19, 2009 - 10:12 AM


Start with the carb. Look for varnish deposits in the jets.


Posted June 19, 2009 - 01:34 PM


do the basics first, it will save you money
Change gas out use 92 octane
Change oil and filter,check/ clean screen in neck tube
Change or clean spark plug/check spark plug wire. replace if needed
clean carb, jets, bowls, linkage etc..
i trusted starting rules for a 02 yz426 as follows
1. pull choke out
2. twist throttle full open and let snap shut(this is the last time you should touch the throttle)
3. pull kick start out cycle kicker til it stops, bump compression lever just alittle til the kick moves slightly down, let the kicker back to the top and kick like hell
4. i have never had my bike not start up within 3 kicks
good luck hope there isnt any problems

Related Content


Thinking about Yamaha 250... by Arctic Pride

Dirt Bike   Special Interest Forums   Pro Racing
  • Hot  491 replies

Megabomb Fitment by 288yz450

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

2016 YZ450 by CaptainKnobby

Dirt Bike   Dirt Bike Technical Forums   Suspension
  • Hot  59 replies

Should I buy this bike? help....... by Numsa Hul

Dirt Bike   General Dirt Bike Forums   What bike should I buy?
  • * * * * *
  • 10 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.