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MOV #760985
12/31/18 12:44 pm
12/31/18 12:44 pm
Joined: Oct 2018
Posts: 1
Horley, Surrey, England
A
AllenBooth Offline OP
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AllenBooth  Offline OP
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Joined: Oct 2018
Posts: 1
Horley, Surrey, England
Does anyone know if it's possible to fit a MOV crank assembly into a MAC or early MSS crankcase, I'd like to try a short stroke 350 using a MOV bottom end and a sleeved MSS top end.

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Re: MOV [Re: AllenBooth] #761018
12/31/18 5:34 pm
12/31/18 5:34 pm
Joined: Jun 2017
Posts: 50
CALIFORNIA
S
slow learner Offline
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slow learner  Offline
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Joined: Jun 2017
Posts: 50
CALIFORNIA
The MOV crank would fit in MAC cases with no difficulties but that would get you nowhere as the bore of a MAC is the same as an MOV. The MSS crank drive side shaft is significantly bigger in diameter and the drive side bearing is wider. You could probably make shims and spacers to make it all work but it would be a bit of a lash up. An old guy I knew told me they used to adapt MSS barrels and MAC cases to work together (the original big-MAC) but I don't know how it was done.


Laurence Luce
Re: MOV [Re: AllenBooth] #761072
12/31/18 11:34 pm
12/31/18 11:34 pm
Joined: Jul 2016
Posts: 242
Australia
Joolstacho Offline
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Joolstacho  Offline
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Joined: Jul 2016
Posts: 242
Australia
OTH you can prep an iron MAC so that it goes pretty hard, 100mph not out of the question.
M17/8 cam, compression, bit of porting, carb, simple mods to the lubrication system.
But it leaves the gearbox mounting with it's single adjustable mount on top vulnerable to twisting and breaking the shell.
On mine I added (welded on) a second top mount on the gearbox shell and used x 2 left hand gearbox plates.
Just an idea Allen.


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