I probably bit off more than I can chew but here it goes. Decided to install my previously used 50cc gila derbi kit onto my basket pa50ii hobbit (the bearings were originally busted and it had a pa50i cylinder on it-- so i figured it was the best time to experiment). here are the specs:
-original hobbit case bored out to accept derbi kit, 12mm crank installed
-6mm studs (using original stud holes on cylinder and head)
-moby av7 intake with a 15mm SHA clone (runtong) - 68 jet
-derbi pp head (no decomp channel) sanded down for < 2mm squish, decomp is not hooked up
-derbi 6-roller + treats rumpus plate @ 16 grams
-new treatland replica belt
-hack weld pipe
it runs and idles (rather well) but is very slow. its also jetted super low (currently at 68) compared to what i think it should be (maybe more like 80) but will 4-stroke and foul a plug if i go up any higher.
it only hits about 32 mph but SHOULD be going over 40 pretty easily i think maybe closer to 50.
any ideas? now that i've typed it all out i think i should tune my variator more precisely and maybe throw a temp gauge on it. (edited)