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| #4  08-Sep-2005, 22:53 | ||||
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| Your other problem is the 50mm exhaust system. If you are racing, and want the extra bit of top end that it gives, fine. If you are road riding or 'normal' track-ing then you'll be better off with a 45mm system. I know cos 1) I have a 748SPS which has longer-duration cams than the R, and with a 50mm system I was thinking of getting rid of it, (and I've not had it a year yet) cos the hole in the power delivery around 5-6000 was pathetic. 2) My mate has a 748R, and he has no 5-6000 hole in the power delivery. 3) I've tried 3 different proms with and without 3 different PC maps, and none really made much difference. 4) I fitted a 45mm system - put the 'correct' 76 prom in - and what a transformation ! I'll even bother to go and get it dyno-set up now, cos it has so much more potential  The prob with advice from the power-junkies (sorry nelly  ) is that they accept no compromise  I'm going to try a few pc maps again before I let anyone else near it tho  |
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