Hi all, at the risk of sounding like a complete technical idiot, I have to get your opinions on this.

I've recently been offered a box of MC18 spares by someone. Cylinders, cylinder heads, CDI, carburetor, reed valves, crankshaft and a few other bits. They were removed from a MC18 before it went to the scrapper.

I took a look at the crankshaft, the bearings at the end spin easily, but my main question is, the centre bearing. I tried to spin it with my finger, it spins, but it felt like it had some resistance. Isn't that a tell-tale sign of a seizure about to happen? The seller was telling me that the centre seal isnt spinning easily cause it's been coated with grease? and when that's cleaned off, there's no problems.

Would really appreciate your inputs on this. Cheers.

Why not clean it off and see how easy it spins?

The centre bearing has a seal as an integral part of the bearing which would create a bit of friction.
The seal is fixed to the bearing outer ring.

See this post for a picture:
http://nsr250.net/forums/viewtopic.php?p=72125#72125

or just click here and wait for the picture to download.
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[color=#808080][size=9]Yes,.. I too know how to waste Time and Money,...

Early and late mc18 cranks are not the same so take care.
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Please do not PM me technical questions, if you can't find it on the Forum start a thread

fontyyy:
I'm aware, thanks for the advice.

Will be collecting the box of spares this weekend and hopefully will have it swapped into my bike over the week. Fingers crossed.

Thanks for the advice guys. will post again on how it goes.