Yamaha yzf 426 2002

3 replies to this topic
  • Jasonmo55

Posted March 19, 2016 - 02:15 PM


Alryt new in here need some advice not too clued up on the bikes other than driving them like wen I start this its first bit of the exhaust attached to engine heats up like instantly it's warm if bikes idle for seconds

  • Jasonmo55

Posted March 23, 2016 - 12:51 PM


please some feed back is this normal 


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  • grayracer513

Posted March 23, 2016 - 03:08 PM


Totally normal.  In fact, if you roll the thing out into your driveway about a half hour after sunset and let it idle for about 1 minute, it will probably turn a nice dull red.  Maybe not that dull. 


It's a byproduct of very thin wall tubing in the header, a lack of any cooling air flowing over the pipe, aggressive cam timing, and the fact that the normal exhaust gas temps run at around 1200-1500 degrees, whereas a red glow visible in reduced light indicates a metal temperature of around 800.


What should you do about it?  Don't touch it.

  • Jasonmo55

Posted March 28, 2016 - 05:30 PM


Thanks mate also sorry to be pest but I was clearing out garage then went shopping around 2 hours the bike had fell over within this time I picked it up n left it to the next morning and tried to fire it up it woundnt start just almost I can normally start it first or second kick and backfired few times which it's never done while tryna kick has it done damage or possibe other problems would be appreciated

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