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Home > Help Needed / General Tech Chat > Crankshaft +clutch typ

tellskog

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Trollhättan, Sweden

15th Nov, 2005 at 02:01:50pm

Recently bought a used EN 40B crakshaft, how do I determine if it's an A or an A+ crank?
If it's A crank does it fit to a A+ setup, or do I need to change dropgears and clutch?

cheers
Henke

Tom Fenton
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Fearless Tom Fenton, Avon Park 2007 & 2008 class D winner

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TM legend.

Rotherham South Yorkshire

15th Nov, 2005 at 02:08:40pm

I am really not certain on this one.

I _think_ that the A+ primary gear will fit an A series crank and vice versa, but I'm not sure. The clutch and flywheel are definately interchangable.

Vegard is the knowledgeable chap on A stuff on here, he may be able to tell you the answer 100%.


On 29th Nov, 2016 madmk1 said:

On 28th Nov, 2016 Rob Gavin said:
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Joe C

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Carlos Fandango

Burnham-on-Crouch, Essex

15th Nov, 2005 at 02:50:01pm

A and A+ cranks are interchangable.

On 28th Aug, 2011 Kean said:
At the risk of being sigged...

Joe, do you have a photo of your tool?



http://www.turbominis.co.uk/forums/index.p...9064&lastpost=1

https://joe1977.imgbb.com/



Vegard

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I pick holes in everything..

Chief ancient post excavator

Norway

15th Nov, 2005 at 02:50:57pm

No A+ crankshafts were ever EN40B. The only difference between a A crank and an A+ crank is the fillet radii (spell?)

If it's aftermarket it could be anything.

Anyway, ALL 1275 cranks fit in all 1275 blocks with the correct thrust bearings. All 1275 primary gears fit all 1275 cranks.

The choice of drop gears depends on which gearbox you're using.

On 13th Jul, 2012 Ben H said:
Mine gets in the way a bit, but only when it is up. If it is down it does not cause a problem.

tellskog

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Trollhättan, Sweden

15th Nov, 2005 at 03:51:42pm

Thank you Vegard, lift a great weight of my mind !

mini300bhp

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Cambs

16th Nov, 2005 at 12:05:45am

Arr, but if its an S-crank it'll have smaller big ends wunit.

Its only a bit of metal. If it blows it blows!

http://www.putfile.com/mini300bhp


Vegard

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I pick holes in everything..

Chief ancient post excavator

Norway

16th Nov, 2005 at 09:21:55am

Yes, but it'll fit either block.

On 13th Jul, 2012 Ben H said:
Mine gets in the way a bit, but only when it is up. If it is down it does not cause a problem.

BENROSS

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Mitsi Evo 7, 911, Cossie. & all the chavs ...... won no problem

22nd Nov, 2005 at 09:47:57am

Only the cooper S cranks most of them EN40-B

had 1"x 5/8 big ends

the none S cranks sported 1"x 3/4 on the big ends as the meterial spec was dropped.

you may have An S crank?

if so you will require S rods
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