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Big end and main bearings


axle117

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So I am at the stage in my build where I need to buy the bearings.

I have purchased a new crank and rods (thanks Marc) and need bearings to match.

1. do i need to get the rods and crank measured or can a place like STA parts supply the ones I need without measuring?

2. do I go OEM or ACL?

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Crank is at STD 52mm, miked and was within spec. I would probably just run ACL duraglide as its not going to be making big power right? Ether way with building any engine there is no garentee the clearances will be spot on as there are minor variations in rods + cranks and bearings and if all the little variations work against each other in the given combo the clearance will be out hence rod re sizing crank polishing, cap grinding etc.

Id start with some STD acl or bearing shells and then measure up your clearances and go from there and hopefully they will be in spec without doing anything and should do for your application :)

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 marc said:
Crank is at STD 52mm, miked and was within spec. I would probably just run ACL duraglide as its not going to be making big power right? Ether way with building any engine there is no garentee the clearances will be spot on as there are minor variations in rods + cranks and bearings and if all the little variations work against each other in the given combo the clearance will be out hence rod re sizing crank polishing, cap grinding etc.

Id start with some STD acl or bearing shells and then measure up your clearances and go from there and hopefully they will be in spec without doing anything and should do for your application :)

Awesome, cheers for that. I'll go in that direction and see how I go :-)

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