Just installed a 48cc 2 stroke on my schwinn clairmont. Started right up the first time. It's pretty cool. Had a small problem with the exhaust. Didn't know there was an end cap that needed to be checked for tightening and lost the darn thing. Son of a gun sounds like a damn harley now. I ordered a replacement muffler as I could not figure out how to buy just the end cap. No big deal. Was having some problems with the clutch and choke but seem to have figured it out. The chain tensioner bracket was too big for my frame so I cut a piece of the old handlebar grip I removed to install the throttle and took up some of the extra space. Still need to reinstall my rear fender and rack(you should be able to see it in the before picture). I need to do a small modification on the fender on the motor chain side. It rubs so I plan on cutting a section with tin snips and bending it to allow clearance. The only problem I'm still having is that the engine bogs down when I try to accelerate more the quarter throttle. Any ideas?