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Airone flywheel key.

clive

Just got it firing!
Joined
May 9, 2011
Messages
13
Hi.

Whilst changing the clutch on my airone like a fool, for reasons unknown other than curiosity, I removed the primary gear from the crank.
Unfortunately I didn't look at the flywheel key position before I took it out to remove the gear. By position I mean which way the chamfers on the key were positioned.
The fact the key seems to go in with the chamfers positioned horizontally or vertical in relation to the keyway doesn't help. I also noticed the key has a punched dot in it.
My question is - does the key go in with the chamfers on the horizontal plane, with the dot facing up, or are they positioned vertical?
Sorry for such a dumb question.
Thanks.

Clive
 
Clive,
Sounds like you've done what many of us has done, a friend refers to this as "let's take it apart to find out why it's working so good"...
Anyway, prior to installing the small primary pinion gear on the crank, just try the key and see which way it fits snugly, normally, the rounded (chamfer) side into the slot works, but I don't think the position is critical, but it'll probably fit better in one direction. Once you figure this out, remove it, slide on the pinion gear with spring behind, depress it and insert the key.
Here's the more important part, when you reinstall the clutch cover, the spring loaded pinion gear will try to hold the cover away from the case, DO NOT try to draw the cover down using the screws, you might get away with it a time or two, but eventually you'll strip the threads in the case. I have a small piece of plywood, just slightly bigger than the hole in the cover where the pinion gear is, with a hole in the plywood, the size of the crank, or at least smaller than the OD of the nut, then using an old flywheel nut, (or take your existing nut out of the flywheel), I spin the nut down drawing the cover down to the the case, then install the screws, then reinstall the flywheel.
Good luck,
Mike
Boston
 
Hi Mike.
I've been messing with it again and I think I've got it sorted. I love tinkering with mechanical things. It all started years ago. I have three brothers and we are all into motorcycles having grown up with them. My father bought a Malaguti motorik junior bike for myself and my younger brother in about '72, '73- (I'd be 6 or 7 years old) and every time my younger brother rode it it would come back with either a puncture, broken chain or some other malady and I would set about fixing it. As the years progressed so did the bikes - and the maladies.

Anyway I digress. Thanks for the tip regarding the clutch cover, i'll rig up something similar.
 
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