Re: four stroke engine.
Get one of these, it will meet all of your demands (and then some). Just remove the gas tank and get a 4-stroke mounting plate and follow the Harbor Freight in-frame builds on the forum. It's a Kawasaki 124cc 4-stroke with 4hp+ and mate it to an EZM tranny. This set-up will make a bicycle fly....but it won't be real light...90-100lbs.
EZ Motorbike Dealer - San Diego, CA.
Nothing is out of my realm,
if it doesn't fit, make it fit! Beer is the answer....what was the question?
A sense of humor
costs nothing, why don't people use them more often?
"You can't buy respect.....you have to earn it"