2 questions

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

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.

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.

Second FMF/megabomb! :excuseme:

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