luca.stere Posted December 26, 2021 Author Report Share Posted December 26, 2021 And now I have all the parts painted, I have painted again the headlight shell because i had some minor scratches due to the work done before for electrics, front fork, etc. Small progresses but I will succed one day to finish the bike... Quote Link to comment Share on other sites More sharing options...
Vance Blosser Posted December 27, 2021 Report Share Posted December 27, 2021 Looking even better! Quote Link to comment Share on other sites More sharing options...
luca.stere Posted February 11 Author Report Share Posted February 11 I am working again on my M72 and I had some trouble with the engine. Last time after I have worked on carburetors (you have link on previous page) I was not satisfied about the engine, it was running strong but I felt something is not right and I have decided to check the engine again and by that I mean the points position for the timing gear and camshaft. For doing this I have used the center lobe method and I have found that the camshaft was too advanced with two teeth. The camshaft is new but I am sure is a chinese CJ750 replica and the key slot was not done properly or the CJ750 has another position points on their timing gears. Quote Link to comment Share on other sites More sharing options...
Vance Blosser Posted February 12 Report Share Posted February 12 Good detective work! Quote Link to comment Share on other sites More sharing options...
jim.mt10 Posted February 13 Report Share Posted February 13 Yes, well done, Luca, you could have been chasing that problem for a long time. When you say the engine was running with this problem, what was it you were not happy about? Were you getting pre-ignition? Quote Link to comment Share on other sites More sharing options...
luca.stere Posted February 13 Author Report Share Posted February 13 2 hours ago, jim.mt10 said: When you say the engine was running with this problem, what was it you were not happy about? First it was the sound and the fact is was reving too quick for a SV engine, also some of the compression was blowing in carburetor and sometimes the idle was not stable. Difficult start after sitting more then 15 minutes... there were obvious signs that told me something was not right. 2 hours ago, jim.mt10 said: Were you getting pre-ignition? I did not had pre-ignition because I was forced to retard the ignition timing right from the start. Quote Link to comment Share on other sites More sharing options...
jim.mt10 Posted February 14 Report Share Posted February 14 Hi, Luca The reason I asked about pre-ignition is that I am having trouble with pinking on my mt10/36. I changed from points ignition because my bike would only run with the old style points weights not wth the new ones. Now I have the electronic ignition at full retard, in fact I made the slots longer to move the plate even more anti-clockwise, but it still fires a bit too soon. The full advance line comes in the window just above tickover. I don't think my timing is out on the shafts. Quote Link to comment Share on other sites More sharing options...
luca.stere Posted February 16 Author Report Share Posted February 16 I have made the setup for the ignition timing but because of the camshaft problem I was not able to put the timing on the correct values but I am close enough in order to make this engine runing good: Quote Link to comment Share on other sites More sharing options...
jim.mt10 Posted February 17 Report Share Posted February 17 Nice video, Luka and well explained. I hope your motor runs well. Ride safe jim Quote Link to comment Share on other sites More sharing options...
luca.stere Posted February 17 Author Report Share Posted February 17 3 hours ago, jim.mt10 said: I hope your motor runs well. I did not had the time to start the engine, maybe next week... but now I am sure it will run just fine considering what problems I had and now solved. Quote Link to comment Share on other sites More sharing options...
RussN Posted February 19 Report Share Posted February 19 Luca: I look forward to hearing of your success running the engine. RussN Quote Link to comment Share on other sites More sharing options...
luca.stere Posted April 9 Author Report Share Posted April 9 I have started the engine and now it is working just fine, for the moment I did not made a video because I still have problems with the carburetors which are running to rich on fuel but the main problem that I had with the camshaft position is gone! Now the engine has a very easy start and it is not stopping anymore on idle and the ignition advance operates now in the normal ranges. Quote Link to comment Share on other sites More sharing options...
Vance Blosser Posted April 9 Report Share Posted April 9 Congratulations! Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.