You can buy the 30 tooth rear in aluminum, all else is steel. I havent personally checked into the others because I ride mine often and am willing to sacrifice a little ET to get long term usage. As far as the carb jetting, Lectron is out in left field in comparison. They dont use main jets or pilot jets inside the float area. They use a tapered metering rod to take the place of both. You adjust the height of the rod to richen or lean the idle and part throttle circuit, then you change the jet in the power jet at the rear of the carb for wide open operation. They use a mikuni pilot jet in the power jet for ease of part availability and tuning. They made mine adjustable by putting in an adjustment screw. The gas burners have one powerjet, the alky burners have two.

 

Here is a 38 mm Lectron on e-bay. It's not set up for alky but could be easily. Bubba had his set up. http://cgi.ebay.com/ebaymotors/ws/eB...tem=1876522763