michael whiteman
Well-Known Member
- Local time
- 1:52 AM
- Joined
- Mar 2, 2021
- Messages
- 632
Jerry..........I was under the impression the 142F (49cc) and the 144F (53cc) engines were the exact same thing with only the piston diameter being larger. Anyone, correct me if I'm wrong. It surprises me to hear your rocker arms look different. This makes me think you probably have a 53cc engine. The only way you can tell for sure is to split the case open and slowly lift the cylinder upward until the bottom of the piston skirt is exposed. Stop right there!....if you lift it further the rings will pop out and you'll have to compress them in order to get it all back together. Take a micrometer or dial caliper and measure the piston diameter. This will confirm the size of your engine. 49cc = 41.8mm or 1.646in 53cc = 43.5mm or 1.73in
Last edited: