WD Motorcycle forum

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Mar 3, 2015 - 10:56AM

Shaft at drive side

Dear

I am trying to solve this problem (shaft groove is gone) on My M20 Engine. Any other idea rather than replacing the shaft ? Please advise.

Regards
Rofiq

email (option): rofiqmgl@yahoo.com

Ian Wright

Mar 3, 2015 - 11:41AM

Re: Shaft at drive side

Hi Rofiq...That one is bad...

The only thing I would suggest is to make up some pieces to take up most of the wear and then carefully tig weld them into place along their length..

Some machining and hand finishing would make everything fit again...

Mainshafts are still available but changing them can be awkward as it is difficult to rivet them successfully...
The shafts are a light press fit into the flywheel and the rivets ensure the shaft flange is held tightly against the flywheel...

Another and easier option is to drill and tap the holes and then screw the shaft to the flywheel using high tensile countersunk screws...This is a mod used by people racing Gold Stars etc...

Replacing the entire crankshaft is the other option...The problem is shipping cost though if you can't find one locally...Ian

rofiq

Mar 4, 2015 - 2:24AM

Re: Shaft at drive side

Hi Ian

To me the first option is the possible way because the weakness of my experience and skill. Thanks a lot for your advise. Let me do it carefully and solve the problem.

Regards
Rofiq

email (option): rofiqmgl@yahoo.com

Terry in Australia

Mar 4, 2015 - 7:11PM

Re: Shaft at drive side

I have piles of flywheels for m20s you can have a set for free just pay post cost. I'm in Australia though where are you?

Bruce Cooper

Mar 5, 2015 - 2:18PM

Re: Shaft at drive side

And that is exactly why I love this forum.

Good show, Terry.

Bruce Cooper
Houston

email (option): btcoop77069@aol.com

Henri

Mar 6, 2015 - 2:30AM