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yz426-450

hot pipe?

7 posts in this topic

I have a yz426 with a 450 bigbore. One thing i noticed is the pipe will glow right where it bolts up to the engine if the bike is idle for too long. I'm running 1 gal. of 110 and 4 gal. of 93. i don't know if the fuel is just too hot or if something is wrong.

Erik

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They all do that. I use the pipe on my 426 to light my smokes when Im out riding. :)

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it shouldnt glow too much - thats usually a sign that the jetting is too lean and thats not a good thing for the engine. Play around with the jetting and richen it up a bit, the glow should almost go away and the bike will have more power as well!

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Do a search on that subject and you'll find all the info. you will need.

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Did you know that the timing retards in neutral, too?

Every single stinkin' one of these bikes will run the header at least cherry red if left idle more than a minute or so. In about another 30 seconds, they'll boil over, too. 'Just the way it is.

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