Author Topic: Hmmm looking for more top-end. Piston Port 250.  (Read 624 times)

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Offline John Orchard

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Re: Hmmm looking for more top-end. Piston Port 250.
« Reply #15 on: April 12, 2019, 06:26:13 PM »
Took the bike for a blast up the street today, much better, before shortening the header the top-end power was about 60% of the midrange, now the top-end is about 90% of the midrange.

Next mod is to dig through all the old pipes l have laying around and find a cone, with a less acute angle & shorter, than the current 'baffle' cone (the reducing one), this will make the powerband narrower but boost top-end.
Johnny O - Tahition_Red factory rider.