No compression

[Smurph]

I have a Kymco Agility 125 with no compression. I've had it checked twice and confirmed that there is no compression..

Its got some 35,000 km on it.

I feel like the lack of compression is either bad rings or bad valves. I haven't gone in to check but I will soon.

Any suggestions on what else I might look for?

If its rings and there's damage to the cylinder wall, I'm just going to put a 150cc conversion on it and that should solve the problem. However, if the problem is with the valves, that won't be a solution.

I'm also considering just buying a new 150cc engine and mounting it right up giving me a fresh everything and most likely avoiding problems with other things that might be going bad.

[thebatman]

If you buy a new engine, what would you want for the kymco engine?????

[harry]

do your compression test and squirt some light oil in to the cylinder
that will tell you if the rings or valves are bad ( if your compression goes up
with the oil its the rings )

oilyhans

[hworkman]

Harry is right.

Im thinking its probably the rings.

[h20 zuma]

wow 21,747 miles on this engine. I am suprised it would last this long. Why not invest a bit more money to get a set of good quality big bore kit and new timing chain and guide.