I got ambitious last evening and dismounted my engine. I removed the rubber soft mounts and set the engine back on the frame to check the fitment. There was still a clearance issue with the front derailleur even with the 48T chain wheel removed. I decided to ditch the front derailleur all together, and just attach the 36T as the single chain wheel on the crank. The rear wheel has a 6 gear cluster ranging from 14 to 28. If I need any gearing lower that that, Well that's what the engine is for ;-) There is a 26T on the crank as well, but I'm taking that off too. This bike was a real wall crawler, with a lower than 1:1 ratio. I'm going to have some issues with the exhaust pipe clearing the crank. I have a few tricks to try before I have to resort to bending the pipe. A couple of my 'Hall of Shame' items might help. The aluminum heat-sink/extension might work. The banana pipe is just too fugly for words ;-)