Author Topic: bigend shells  (Read 846 times)

Offline wilko

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bigend shells
« on: 14.07. 2014 09:04 »
Has 60 thou undersize bigend shells ever been available for plunger engines? Can't find any anywhere?

Offline Briz

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Re: bigend shells
« Reply #1 on: 14.07. 2014 10:29 »
Dont think so. Taking .060" off an already skinny small-journal crank would be sailing close to the wind!

Offline The Artful Bodger

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Re: bigend shells
« Reply #2 on: 14.07. 2014 16:28 »
Biggest I could get in the UK were + 40 for the small journal, +60 are available for the big journal.
Colin

Offline Resto-Rob

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When life throws you a curve..... lean into it!!
1953 BSA A10 Plunger
1927 BSA S27
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Online muskrat

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Re: bigend shells
« Reply #4 on: 14.07. 2014 21:01 »
Nice try Rob. They are for large journal which is the same for the A50/65.
I tend to agree with Briz. Might last with low comp and all other bits are in good nick.
Cheers
'51 A7 plunger, '57 A7SS now A10CR,  '83 CB1100F, 88 FXST .
Australia
Muskys Plunger A7

Offline wilko

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Re: bigend shells
« Reply #5 on: 15.07. 2014 00:20 »
Oh well. back to the drawing board. Even the spare crank has rusty journals and measures 1.450 in.

Online KiwiGF

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Re: bigend shells
« Reply #6 on: 15.07. 2014 23:55 »
Some say the sj crank having a smaller sludge trap hole has more potential for over grinding than the relatively thin walled lj crank but I have no experience to back that theory up  *smile*

I've heard certain triumph con rods can be fitted to sj cranks and provide more regrinds so maybe you should keep this topic alive snd wait to see if anyone can post on this before givIng up?

My bikes big ends are newly ground to  -040 and I also have a spare crank already on '040 and needing a regrind so I interested to know if the spare is just a paper weight!
New Zealand

1956 A10 Golden Flash (1st finished project)

1949 B31 rigid “400cc hot rod” (2nd finished project, + favourite bike)

1949 C11 rigid, but why!!! (cos it was cheap)

1937 B21, project missing parts, mission impossible?

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