2 questions

3 replies to this topic
  • 08yz450thumper

Posted November 21, 2009 - 09:18 PM


whats a decompression system and whats the best performing exhaust that i can get for my 08yz450f??

  • girton212

Posted November 21, 2009 - 09:22 PM


if you have the money and want a full system, deffinately go for FMF 4.1 with megabomb header. if you dont have a lot of money the fmf powercore gives performance. or go with a DRD.

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  • chris7521

Posted November 21, 2009 - 11:34 PM


whats a decompression system

It is a mechanism on the exhaust cam in which a pin opens an exhaust valve early shortening the compression stroke. Still has enough compression to start but not so much the bike is hard to kick over. Once started the pin retracts by means of a fly weight.

  • mayday

Posted November 22, 2009 - 10:55 AM


Second FMF/megabomb! :excuseme:

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