Speed Demon- I didn't really "cut" the frame. I put a cart axle in the rear with a 700 trans. The front I just welded a piece of box iron in place of the orig axle and put cart spindles on it. USLMRA don't let you cut the sheetmetal so I had to leave mine stock. Plus it still kinka looks like it is suppose to! It is 37 3/4 inches side to side, that way I slide though tech easily! Engine---28 cid briggs. Small piston, ARC rod, G-force cam, ported, ARC counter balance weights, ARC flywheel, G-force carb, and 11 hp head.
Creechfan--- Here is a pic of the throttle on the carb, not real good but that is all I got. I used a conduit retainer and spring for a go kart, then drilled out the hole on the carb and used a cable swivel to hold the cable to the carb. Got all that stuff from APS page 147.
The set up on the wheel is a Goldfinger left had throttle for a snowmobile. It is basicly a bike brake but it has a cool little trigger. Here is their site. http://www.fullthrottleinc.com/
If you want one they will sell just the throttle and a cable for $40. But you have to call and request a "racing lawnmower throttle" If you don't get it this way it will cost you $100 because it comes with a bunch of stuff that you don't need that is for a sled. Cool product and nice people to deal with, I highly recomend them.
Hope this helps
Later