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View Full Version : When to re-jet?



888
18th November 2009, 19:12
I'm just about to get a Yamaha TTR250, and the dealer is going to put on the Yamaha GYTR Slip On Exhaust- do I need to get the bike re-jetted at the same time? The dealer doesn't think so, but I'm not sure.....

Additionally- anyone have any idea what (if any) hp increase the Yamaha GYTR exhaust will add?

klx kid
20th November 2009, 17:57
everyone i know that has changed exhaust systems have not changed their jets. and i think the GYTR's add 2.7hp.....but i dont know if it is the same for TTR (the 2.7 is for YZF's or atleast some of them)