The 157QMJ gy6 engine is the most common engine in use in buggies and scooters. There are several other type of the gy6. The one's with the 2 bolt valve cover use a different head, cylinder, crank shaft and on some different cam which will not work in the QMJ series. The JL1P57F model you mentioned in the subject line I do not recognise. Some GY6 models were water cooled and some models have a longer case which will not fit our buggies even though they look the same there are differences. If your engine is the 157QMJ you have a large choice of parts available for it. From big bores and stroker cranks to 4 valve heads and several size camshafts. What brand buggy do you have. TOM
|