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Discussion Starter · #1 ·
I need new bearings for the rods in my cx. i've tried measuring the old bearings with calipers and they come up .057 in inches. thats smaller than my book says they used. i've checked all four bearings, all the same measurent. so i'm not sure which bearings to buy as they are too small to be any of them. please help, cause i'm at a loss.
 

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I need new bearings for the rods in my cx. i've tried measuring the old bearings with calipers and they come up .057 in inches. thats smaller than my book says they used. i've checked all four bearings, all the same measurent. so i'm not sure which bearings to buy as they are too small to be any of them. please help, cause i'm at a loss.




What size does the book list?



Why do you say that you need new rod bearings?



I would suggest using plastic gage. It measures the difference in size in the bearings and the shaft.



IMHO a caliper isn't accurate enough to measure a crank and crank bearings.



Regards,



Dan
 

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There are several big end shell bearing sizes colour coded to the Crank shaft inner lettering and the Con rods to be used(See the manual).Some of them are no longer available.You would be better served getting a decent running engine or a decent matched crank and rods.

I have postulated that the thickest,"Black" colour coded shells could be used on a worn crank but should be checked at a local engineering/engine specialist who have the correct equipment.

There are no official undersized shells for crank regrinds on these engines




The good news is there's usually a lot of decent low mileage sets over there in the USA.In fact the crank in my Present CX500 here in the UK was from a USA Ebay seller/bike scrapyard.

I bought from the US as I know the CX/GL500s over there haven't had the abuse,in most cases,that the UK CX500s have had and at the time the Pound/Dollar ratio was in my favour.

I was also lucky enough ti be able to get all my shells over here but had to source them from a couple of well know reliable bike supply companies.





You can make inquiries at,



http://www.davidsilverspares.co.uk/



and this bloke knows virtually everything about these bikes/engines,



http://www.johnoldfield.co.uk/



and both companies are great to deal with.If you contact John Oldfield he can advise you further.



Note:All CX/GL 500 crank shafts will go into all Crank cases without the need to replace the Main bearings.I've had some of the worst abused engines you could imagine but even on these engines the Main bearing white linings are still perfectly usable.
 

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Discussion Starter · #4 ·
What size does the book list?



Why do you say that you need new rod bearings?



I would suggest using plastic gage. It measures the difference in size in the bearings and the shaft.



IMHO a caliper isn't accurate enough to measure a crank and crank bearings.



Regards,



Dan




around here i can't find a doner engine and if its gonna cost me that much i'm just gonna scrap the whole thing. the bike has 17,00 miles. but somone over reved it and it cause an exhaust valve to crack and then come apart. that smashed a piston (i bought another set) and the pressure also smashed the rod bearing on that piston. the crank is fine, but i now need new bearings for the rods. anyone know a good way or tool to use to find my exact bearing thickness, so i can find what i need? the bearings do have part numbers on them if anyone has a way to find it via that. H24S 7102
 

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around here i can't find a doner engine and if its gonna cost me that much i'm just gonna scrap the whole thing. the bike has 17,00 miles. but somone over reved it and it cause an exhaust valve to crack and then come apart. that smashed a piston (i bought another set) and the pressure also smashed the rod bearing on that piston. the crank is fine, but i now need new bearings for the rods. anyone know a good way or tool to use to find my exact bearing thickness, so i can find what i need? the bearings do have part numbers on them if anyone has a way to find it via that. H24S 7102
look at the information in sheps post.email them direct.see their reactions.
 

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Discussion Starter · #7 ·
well, i went to o'riellys and used there digital calipers. i got .0595 as a thicknes. gonna go with the black bearings as they are .0590 - .0593, figuring the gauge was slightly off and thats the thickest set they make. i'd rather rebuild this engine than buy another and know nothing of what i'm getting into. especially when this will be my daily for a quite a while and get me 2,000 miles away from here. thanks.
 
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