Re: potential motorized biker
I'm unsure exactly how many miles but its a LOT. I ride every day and I've had this engine for going on two years now without a single failure. My chain roller is worn out but it still rides fine(I just don't trust it anymore)so I've ordered a new roller made from a skateboard wheel. Maintaining these motors is VERY important. I go over my Pig daily for loose stuff and fix anything I find before it becomes a failure. The main thing I do to prolong engine life is to run it a touch rich for plenty of oil. Mine is jetted to run smooth under throttle and four-stroke a bit when cruising. I run 40:1 with good oil and the rich jetting lowers engine wear. I also don't scream my motor since I run a higher gear to lower my normal cruise rpm's.
I run a tack welded tensioner, HD#41 roller chain, and a auto plugwire and cap.
The only performance part is a homebuilt tuned pipe.
Had the pipe off the other day and no carbon buildup at all in the port!
If more is better, then too much is just enough.
If you can't afford it, build it yourself.