Nasty kickback

[swissdean]

Bit stumped, fitted new chain case cover and also new kick shaft assembly, dry tested before putting all together and worked fine, clutch was slipping on reassembly so adjusted cable and now no drag when kick starting. Good bright spark.

Trouble is kicked it from cold (it's been on the bench for 3 months)and it fired up fine, choke off too soon and it stalled, subsequent kicks it wouldn't start and exhibited violent kick back ...I've parked it back up while I ponder what to do.

Ignition has not been changed so don't think it's too advanced, ignition is varitronic, running rt195 kit ( ...which I also just changed from open mouth to ramair filter... but don't expect this to be the cause?

Any ideas

[johnnyXS]

well Timing too far advanced was my first thought too .
You say that nothing has changed but if it started and ran perfectly first time and since then you get kick back something about the advance must have changed somewhere I should have thought.

I'd check all the ignition wiring over again and look for a short or bad connection or something disturbed that could alter the timing.

Maybe you have switched the positive and negative wires over on the CDi ?


You might find something useful in this thread
viewtopic.php?f=10&t=3457

[Warkton Tornado No.1]

Just really to add (a little) to the good advice already received, I would check the timing by spinning the engine up via an electric drill with a socket attached.

Obviously(!) plug out, in neutral, a proper (mains or 12v) strobe @ the ready, you should be able to ascertain quite quickly what's going on, just for the sake of flywheel cowling removal.

It's what I do & works for me

[Wack]

Two things spring to mind, firstly the air filter would give more vacuum to the engine, so try starting without it, secondly the kickback could be caused by not enough clearance between the shaft and first gear which causes the teeth to catch and violently force the pedal up. It could be the stator but it's more likely to retard as the magnets pull it around clockwise.

[swissdean]

All really sound advice, will give it a go over the week, thanks everyone

[kennystag]

Tornado,
This is one for me to remember. I would check the timing by spinning the engine up via an electric drill with a socket attached.

Obviously(!) plug out, in neutral, a proper (mains or 12v) strobe @ the ready, you should be able to ascertain quite quickly what's going on, just for the sake of flywheel cowling removal.
Cheers
Stag