Have the complete 3.37 gearing set-up, all new HD/aftermarket parts, NEW, (less than 20 miles on it), including the Hayden M-6 auto chain tensioner...Just remove your parts and bolt mine in....$600.00 + S/H
New primary chain
New Hatyden M-6
New Barnett extra disc carbon fiber clutch
New SE diaphram
New Compensator sprocket assy
New Clutch basket
The UPS Man is on his way with a belt driven primary...Couldn't make up my mind....
the 3.37 is the overall drive ratio, motor to trans to rear wheel. this can be changed by a number of ways not just the primary gearing, inclueds final drive sprockets , trans gears ratios , .etc? easy way is to change wheel sproket but to much and you need a differant length chain/belt,
I recomend changing the trans sprocket as it dos not effect swingarm geomitry drive, or the primary, most big twins through the 90s had the 3.37 ratio as factory..
end of the day it gives better take of from the lights, but raises the rpm 300 or so at Hiway cruising,
check this out- www.nightrider.com/biketech/calc_gearratios.htm