Maney Crankcases

B+Bogus · Feb 3, 2023

I have a set of unused Maney cases which I'm about to get machined to take a standard chaincase.
Before I do, is there anyone out there with the opposite problem? i.e., got machined cases and would prefer the reinforcement?

I'll also be looking into a hybrid option of machining the chaincase to the Maney cases, with some metal removed from both.

Matchless · Feb 3, 2023

B+Bogus said:
I have a set of unused Maney cases which I'm about to get machined to take a standard chaincase.
Before I do, is there anyone out there with the opposite problem? i.e., got machined cases and would prefer the reinforcement?

I'll also be looking into a hybrid option of machining the chaincase to the Maney cases, with some metal removed from both.

That's what I did. I ordered the crankcases from Steve to race spec, as I wanted them to be bomb proof. To mount the alternator I put the cases on the rotary table & drilled & tapped three 1/4 UNC holes for pillars to screw into. Then I put the P.C case on the same & milled away the unwanted material. It looks standard & has been problem free for 10,000 miles.

Martyn.

B+Bogus · Feb 3, 2023

Matchless said:
That's what I did. I ordered the crankcases from Steve to race spec, as I wanted them to be bomb proof. To mount the alternator I put the cases on the rotary table & drilled & tapped three 1/4 UNC holes for pillars to screw into. Then I put the P.C case on the same & milled away the unwanted material. It looks standard & has been problem free for 10,000 miles.

Martyn.

Good to know

I have the added challenge of fitting a CNW E/S primary case. Prior to this, it looked to be straightforward enough....

cjandme · Feb 3, 2023

Maybe Martyn/Matchless could machine the case and primary the way he did on his own. Just a thought. It seems a shame to machine away all that material. C

Matchless · Feb 3, 2023

B+Bogus said:
Good to know
I have the added challenge of fitting a CNW E/S primary case. Prior to this, it looked to be straightforward enough....

My method won't work if you're fitting an electric start, as you need the primary case to be very rigidly mounted.

B+Bogus · Feb 4, 2023

Matchless said:
My method won't work if you're fitting an electric start, as you need the primary case to be very rigidly mounted.

Indeed.
Now I've got the stuff in front of me I think the best solution will be to bore out the primary case aperture as close to the fixing holes as possible, then machine the case to suit, with the biggest blend radius possible.
It looks like I can increase the main bearing spigot by around 1", so it'll still be a big improvement over standard.

Maney Crankcases

B+Bogus

Matchless

B+Bogus

cjandme

Matchless

B+Bogus

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