hi guys,

just want to ask about the symptoms to know if the crank bearings is for replacement? My crank has 14000+ on it but I hear a little rattle coming from the engine when I release the accelerator from 5 rpm+ but when I accelerate no rattle. Can anyone give me an idea on how to know it its the bearings?

Best/easiest way is to removed the gen cover and get hold of your fly wheel. Pull it up and down, then front to back, rotate the crank alittle and repeat.

If you feel any play at all its time for a rebuild.
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If I have to take the carbs off once more...

sorry for this dumb question.. where the gen cover you talking about? is it in the right side along the clutches?

Sorry, its the big black cover on the left hand side of the engine covering the fly wheel and pick ups.
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If I have to take the carbs off once more...

Thanks stephen..

May I ask the sizes of the 3 main bearing for rebuilding the crank?

The sizes wont help you much but they can be got though the Classified section.
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If I have to take the carbs off once more...

yup I see in the classified section but I'm not from Australia so I have to look into our local bearing dealer so can anyone tell the the sizes or the numbers encrypted in the side of the bearings?

Nor are we in Aus but its much easyer to get them though him than try and find them. Join the club if you want to try and find them yourself lol
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If I have to take the carbs off once more...

I will take my chances, and I dont see anything wrong trying to find it by myself before I buy from the classified section.. so can anyone please give me the bearing number.. please..

You'll have to whip the crank out, press it apart, and take the bearings to your local supplier.

I tried to get the bearings through a dealer that has had an account with Koyo Japan (OEM manufacturer) for nearly 30 years, and he couldn't even get them. He can't even get close to the sizes/types either.
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Andy.
NSR-WORLD.COM

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have a look at a skf catalog

Yeah, best of luck.

I expect we'll be seeing a flood of them in the Classifieds soon then?
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Andy.
NSR-WORLD.COM

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maybe not........... they are in the skf catalog i got one to see if it was the right one like you i had been looking for them for a age the problem with them is that the lug is not there apart from that it is the same

So the point of the post was what?

SKF dont list a bearing anything like the NSR bearing, its either 1mm too wide, doesnt have the pin in the right place, doesnt have the right rpm ceeling, comes without a snap ring or a combination of all 4 and so is usless

Koyo make the bearings for Honda but wont sell it. There is a limited number avaliable from Aus, for what seems good money which are perfect. Why struggle to find them when there is this limited supply up for grabs.
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If I have to take the carbs off once more...

when i got my bike the crank had been redone with said bearings thay did me for 6000 miles so they can't be that far off can they