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A7 & A10 Engine
A7 1946-1950
Gearbox, Clutch, Primary
Frame
Lucas, Ignition, Charging, Electrical
Amal, Carburation
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The BSA A7-A10 Forum
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A7 & A10 Engine
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A7 Crankshaft fitment
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Topic: A7 Crankshaft fitment (Read 553 times)
Lightningpower
A's Good Friend
Join Date: Jun 2010
Posts: 80
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A7 Crankshaft fitment
«
on:
08.12. 2015 21:03 »
Will a later A7 (1959) crankshaft fit in a A7 semi-unit (circa 1953) crankcase?
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1953 Star Twin - Racing
1953 Super Flash
1956 Road Rocket
1958 Super Rocket
1959 Spitfire Scrambler
1967 Hornet
beezermacc
Guest
Re: A7 Crankshaft fitment
«
Reply #1 on:
08.12. 2015 22:16 »
Unless its a longstroke (pre 51) all the A7 cranks are effectively the same, so, yes, it will fit.
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Lightningpower
A's Good Friend
Join Date: Jun 2010
Posts: 80
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Re: A7 Crankshaft fitment
«
Reply #2 on:
08.12. 2015 23:21 »
Thank you.
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1953 Star Twin - Racing
1953 Super Flash
1956 Road Rocket
1958 Super Rocket
1959 Spitfire Scrambler
1967 Hornet
duTch
Ricketty Rocketty Golden Flashback
Wise & Enlightened
Join Date: Oct 2011
Posts: 4528
Karma: 41
Re: A7 Crankshaft fitment
«
Reply #3 on:
09.12. 2015 08:49 »
I've done it and works fine, but with regard to recent discussion, it may depend on the conrods/big end bolts you use
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Started building in about 1977/8 a on average '52 A10 -built from bits 'n pieces never resto intended -maybe 'personalised'
Have a '74 850T Moto Guzzi since '92-best thing I ever bought doesn't need a kickstart 'cos it bump starts sooooooooo(mostly) easy
Australia
trevinoz
Newcastle, N.S.W. Australia.
Wise & Enlightened
Join Date: Jul 2006
Posts: 3189
Karma: 71
Re: A7 Crankshaft fitment
«
Reply #4 on:
09.12. 2015 20:38 »
With an A7 the bolt problem doesn't arise.
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The BSA A7-A10 Forum
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Technical (Descriptive Topic Titles - Stay on Topic)
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A7 & A10 Engine
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A7 Crankshaft fitment