wright4d Posted November 9, 2013 Report Share Posted November 9, 2013 Does the Long Pipe do exactly the same as the Low Compression Head? if so what are the pros and cons of fitting either one. I assume the long pipe is the easiest since no coolant draining etc. required. Which is preferred? Thanks Quote Link to comment Share on other sites More sharing options...
dadof2 Posted November 9, 2013 Report Share Posted November 9, 2013 Low compression head reduces cylinder pressure and power at all RPM. In a 2 stroke pressure waves travel along the exhaust pipe and then bounce back from changes in exhaust diameter. Changing the length of the pipe changes the distance the waves have to travel and therefore the time they take. This changes the RPM at which the effect of the waves occur. Increasing the length of the pipe gives more time for the wave energy to dissipate. The overall result of pipe lengthening (without other changes) is often a loss of peak power and a flattening of the torque curve but it often softens the feel of the power at low RPM and makes the bike less likely to stall. Quote Link to comment Share on other sites More sharing options...
nigel dabster Posted November 10, 2013 Report Share Posted November 10, 2013 Both if you can, or save your money and do as DJ and me and get a racing 250! 1 Quote Link to comment Share on other sites More sharing options...
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