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Sportster Motorcycle Drag Racing Discuss drag racing on a Sportster Motorcycle.

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cycowrencher cycowrencher is offline
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Join Date: May 2009
Location: Pepperell, MA
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Sportster/Buell Model: XLH 1200
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I was consistent 1.65 to 1.78 with random 1.58s. Yesterday i was 1.53 to 1.58 all day. I have been told that the 30 tooth looses its effectiveness once you get to 135 to 140 hp. Once you are there, you are better off with the 34/57 or 35/56 as the load works for you instead of against you.

My setup yesterday:
16 lbs rear tire
Fork strapped to 1.5 inch
6800 rpm leave
Shift at 7-7.1k

Bike was way fat for fuel but she was consistent so I left her alone.
29.5 Ijet
70 main jet
185 Tjet.

Going to go to a 72 main and down to a 170 Tjet and start over from there for the good air fuel curve.


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