93 Climber 280 Kickback

[dozerash]

 My 93 Climber 280 kicks back bad. I thought I was going to break the Kickstarter or my foot. I ended up bruising the bottom of my foot in our last vintage trials. I was hoping it was just a sheared flywheel key. I took it apart felt like the main bearing was loose. Took some effort but I managed to get the flywheel off. Main bearing was tight. Someone put locktite on the crank/flywheel. I cleaned that off. I should have lapped it but was in a hurry. Put it back together. It's tight now. I checked the stator and all screws were tight. Didn't look like it had moved. I put it back together and it's still doing the kick back. I tried both feet, tried when cold, when warm and it still does it about 90 percent of the time. Could my electronic ignition timing curve going bad? Are there any aftermarket replacements? I have an aftermarket electronic ignition on my SWM and it’s working great! Any suggestions? Thanks for any help!

[kurtas]

Can you move the pickup for the ignition to retard the timing slightly?

[lemur]

3 hours ago, kurtas said:

Can you move the pickup for the ignition to retard the timing slightly?

That's how it works with any engine that has an ignition pickup coil, yes.

... did you gap the spark plug?

Edited 14 hours ago by lemur

[dozerash]

Yes I gapped a new spark plug to the specs in the manual. I can adjust the timing a little bit. I’ll try that next, thanks. I did read the CDI will degrade over time and cause it to stay in an advanced timing curve, causing this issue. Was hoping someone else ran into this and fixed it. 

[dozerash]