Later on in this thread I'll explain REAL the way to select a tuner for optimum flow. My buddy also gave me a suggestion to test to temporarily extend my pipes to check on possible improvement.I'll know after my next testing day 9/21/01 I whipped out my tape measure and ran to my shop as soon as I finished checking the prediction for correct length of my pipes at my max rpm.guess what.my pipes do appear to be a little short. Personally I recieved an email from a certain respected factory engineer just this week pointing out that the tuned pipes I have on my engine are probably a little short. Their power to weight and power to engine size are an order of magnitude beyond what applies here.one would think they would be the example to follow rather than BillyBob's engine hop up and hacksaw sharpening service. PWC's and PRO(alky) racers use very restricted exhaust and really scoot. I keep seeing the same thing over and over.cut the tuner and relieve the exhaust as if the factory guys have no clue as to what tuned length and back pressure should be used. Unless it can be explained to me otherwise it looks to me that there is major mis-understanding of 2 stroke exhaust tuning. OK, guys at the risk of attracting a lot of flames I have to vent something here.
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