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Discussion Starter · #1 ·
Does anyone know what rpms this thing should be running at? I want to figure out my clutching after the motor is rebuilt. Thanks
 

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Discussion Starter · #2 ·
I have searched the forums and found old replies about this ranging from 7500 rpm's to 9500 rpm's. I need something a little bit closer than that. Comet says to use a White spring (82lbs engagement to 160 lbs at shift) (rate=65) and 46.5 grams tip heavy weights. Kinda seems like that wouldn't at up to many rpm's at the top end. Any thoughts?
 

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I didnt answer because I dont know for sure but its something like 6800.. Its low because it dosnt have what is now called a tuned pipe its just a muffler. 250cc-440cc all use the same one
 

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Discussion Starter · #4 ·
Thanks to geiman for this information.

<div class='quotetop'>QUOTE </div>
Ihave a copy of the 1975 AC Competition Manual so here's the information.

This is for the 1974 400 T-7-C free air motor:

Drive Clutch #225-041
Driven Clutch#226-008
Clutch engagement: 3800rpm
Max RPM: 7500
Gearing:22-39[/b]
Information for the rest of you also.

This site rocks!!!
 
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