Yamaha Neos Stator Screws threads stripped

Hey guys so today In an effort to try and find out what’s wrong with my Neos (no lights) I took the flywheel off and I cannot believe what I have found. The screws that hold the stator on have completely stripped and come out and have been rattling round breaking the stator (this is obviously why I had no lights) however I haven’t a clue why this has happened. I changed the stator back in February when the old one stopped producing a spark. The lights stopped working about 2 months ago but since then I have had it off the road to do some cosmetic work. I’ll include some photos below of the screws

 

Oh dear, you'll need to get the mating face true or you will have trouble again, re-tap threads. might be easier to get another engine.

 

Hmmm. Its not much material/width to tap into. Atleast the first millimetres. I think it depends on how deep the holes are right now. You dont want to drill deeper so that you drill a hole through tye engine case. Youll have airleak then. You could deliver it yo a machine shop, but could be timeconsuming and pricey" depends" . And a second hand engine/scooter isnt that expensive. Or you could try youself. To tap, and and ad some washers, to compensate for the material that seemes to been sheared of. Could work?

 

Another thing you can do is use a helicoil
These work as use on my brothers 1983 Kawasaki Z1000 Cam shaft holder caps as threads stripped years ago, and he is still riding today,with no problems.
You can get a helicoil kit of all thread sizes.
A little expensive but do a good job and last years.
The kit has a drill and a tap with helicoils and fitting tool.
If you want the name of the kit I use just ask, and most people can do this with instructions provided.
Best thing is the helicoils are stainless steel so last ages, NO RUST.
Cheaper than a new engine or new casing

 

Yeah shirt

Shunty your right when i said tap i ment helicoil or less expensive brand