shovel max size

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Mar 30, 2008 | 06:01 PM

bisonlee

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6th Gear

Joined: Mar 2008

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From:

shovel max size

hi all,
i have an 80cube shovel that is at +0.010" and the gudgeon pin has scored the barrels, just wondering how much more it can be bored without going over the top. bike will just be a cruiser so not looking to increase power just want reliability.

thanks

bison

Mar 30, 2008 | 07:48 PM

FNFLH

Intermediate

Joined: Sep 2006

Posts: 46

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From: Bristol, Wi.

RE: shovel max size

I have a 1978 80" and went 60 over with no problems.

Mar 31, 2008 | 08:08 AM

Rodney

Road Master

Joined: May 2007

Posts: 953

Likes: 8

From: Central Oregon

RE: shovel max size

welcome to the HDForum lee
.080 oversize is also offered
whats a gudgeon pin??

Mar 31, 2008 | 04:52 PM

bisonlee

Thread Starter

6th Gear

Joined: Mar 2008

Posts: 11

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RE: shovel max size

piston pin, wrist pin, cant remember what else they call it. holds piston to conrod

thanks for the help, hopefully that will remove the marks

Mar 31, 2008 | 09:48 PM

fbn ent

Cruiser

Joined: Feb 2008

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RE: shovel max size

I quit at +.040 for heating reasons. There ARE bigger pistons out there but I feel better with more material there.

Apr 1, 2008 | 08:03 AM

bc40ton

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RE: shovel max size

I agree with the .040 oversize max. on the 80" cylinders. The walls get pretty thin with the .040 over. Mine did come out nice though and the .040 over Keith Black pistons are doing their job. YMMV

Apr 6, 2008 | 09:20 AM

southphillyed

Banned

Joined: Apr 2008

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RE: shovel max size

On rare occasion I've seen 'em go 070 over....but not a wise move longevity wise.
You can always get your cylinders resleeved at L.A.SLEEVE. Then,go back to new stock size bore pistons!

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Apr 14, 2008 | 08:48 PM

BTL

Tourer

Joined: Mar 2008

Posts: 352

Likes: 2

From: Ohio

RE: shovel max size

trying to remember, but i think either 30 or 40 oversafely, by harley standards.

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