chrisnbush
Member
Going back to the original post, you may have an air leak
This happened to me, the carb manifold gasket is **** on a lot of these, as described in any number of posts. Engine cuts out, loses power at higher RPM. Maybe this is it ?
On my first build (no name CH80) I used some permatek oil resistant gasket stuff which fixed it, but looked like ****.
Got my second engine (1st blew up after 1500 miles, upper roller bearing cage broke, cheap cage - looked like stamped steel) from DAX, and am hoping the gaskets are improved. This engine seems to run a lot smoother...
Chris
I installed the 80cc motor kit on a nearly new mountain bike. Everything is straight, well lubed and runs true. After about 100 miles I decided to test the top speed. Up to 25mph everythings great. Plenty of throttle left and when fully open engine sounds like it is going to gain speed rapidly. After about 27mph the engine acts like it is being controlled or held back by some kind of restrictive device. My son in law has the same engine kit and it responds the same way. I have installed a new carbon plug wire, plug and carb. o-ring. I modified the muffler by removing baffles and cutting the small exhaust pipe to about 3 inches. I would appreciate any ideas or suggestions to engine can continue reving. Thanks, Mike
This happened to me, the carb manifold gasket is **** on a lot of these, as described in any number of posts. Engine cuts out, loses power at higher RPM. Maybe this is it ?
On my first build (no name CH80) I used some permatek oil resistant gasket stuff which fixed it, but looked like ****.
Got my second engine (1st blew up after 1500 miles, upper roller bearing cage broke, cheap cage - looked like stamped steel) from DAX, and am hoping the gaskets are improved. This engine seems to run a lot smoother...
Chris