Topic: CBX125 Issue hight gear no power

[scottly]

A friend of mine has recovered tonight (here it is 9:00 pm now) the tool to measure the cylinder pressure and yes, problem found, 75 PSI instead of 175 PSI,

Was the engine difficult to start? Usually with such low compression they are, even to the extent of push-starting to spin the motor fast enough to overcome leaks.
Was the throttle held wide open during the test? Was the test tool of the proper type for use with such a small displacement engine, or was it one for much larger automotive engines? 

[Chris97]

today we opened the engine and found the main problem, exhaust valve broken, luckily the old owner gave me the same bike (as spare parts) and i have a head with the valves that seem alright, friday my friend brings the tool to remove the springs and the one to flare the valve seats and check.

The cylinder is not in a bad way, the piston rings have drawn some oil but there are no deep grooves, I would like to redo the whole new cylinder but before spending a lot of money I go to a mechanical workshop and see how it is with the right tools. put at the level of measurements and at best I only change the piston rings this time

[Chris97]

A friend of mine has recovered tonight (here it is 9:00 pm now) the tool to measure the cylinder pressure and yes, problem found, 75 PSI instead of 175 PSI,

Was the engine difficult to start? Usually with such low compression they are, even to the extent of push-starting to spin the motor fast enough to overcome leaks.
Was the throttle held wide open during the test? Was the test tool of the proper type for use with such a small displacement engine, or was it one for much larger automotive engines?

sorry for the late reply but I didn't notice your message ... anyway everything ok, we did everything correctly with two different tools, then as you can see from my post a little while ago, we found the main problem, thank you very much for advice anyway