Hello to everyone! I 'm George and I 'm very happy because after too many years whithout my mc18 r2j I manage to buy one in a very bad condition and I started to rebuild it! (Sorry for any mistakes but enlish is not my native language) So I will need your help and I will enjoy the conversation with guys with the same passion!
I m starting with these: where can I rebuild the crankshaft ? Where you suggest to replate the barrels? I was thinking of replace the barrels with mc21 ones for better cooling but I m confused about H and L barrels and heads of mc21 as in the engine tuning section of nsrworldcom there is a confusion about this aspect. It is written "The diagram illustrates the difference between SE/SP (H) cylinders/heads and R (L) cylinders/heads" but the table given by HRC, for dry clutch models ( ie SP and SE models) gives L barrels and heads... (?)

Hi George
There is a huge amount of information on compatibility of parts and where to get your restoration done. Use the search.
MC21 cylinders won't fit an MC18.
There are a few companies in the UK that replate cylinders. I have used Aptec and others have used Langcourt. It's important to ensure there is no crack on the exhaust port. Otherwise it will fail.
GT Performance are a good place for crank rebuilds
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Why do things simply when you can complicate them

Hello George, and welcome to NSR-WORLD.COM.

We recently opened a new section dedicated to Members' Builds and restorations, and there are two extremely detailed MC18 builds in there you may be interested in.

Chris's 1988 R2J ongoing saga!

Spud's 1988 R4J build.

There's also Philip building up quite a thread there too, with both MC18 and MC21 content!

Looking forwards to seeing your project and progress, George.
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Andy.
NSR-WORLD.COM

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I'm happy to help with advice and help finding parts
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Why do things simply when you can complicate them