I can't see lapping being successful for long. It used to work on magneto drive pinions years ago but they had a lot less mass whirling round.Papa Lazarou wrote:Aaargh. The worn flat Woodruff key won't come out. The seller was well aware of this problem it appears-hence the slipping flywheel.
I've drilled it gently and tapped it with a drill (gently!). I've used WD40 on it. It needs heart.
So, I've removed all the bits back to the crank and now need to remove the cam belt-which is very, very tight.
I suppose I should just use valve paste on the end of the crank and lap the flywheel in tight.
The seller has not responded.
The best stuff for getting stuck stuff loose is Plusgas in my experience. If you can get hold of some plasticine or play-doh, form a cup round the keyway/key and leave it all to soak in plenty of Plusgas at least overnight. Drain it off, try again. Then local heat. Then Plusgas and repeat several times. You may need to use more force with more suitable implements like a centre or narrow punch and a lump hammer, but beware sharp implements and be careful with your aim on each end of the key alternately.
A bit naughty not to tell you about the problem before sale.