Hey all,

My MC21 has been sitting in my garage for about 6 months now while ive searched ebay/tradinpost etc etc for a new motor for it as the one in it is fooked, but nsr's are a rarity around here. Best price from an importer was $1800 with no guarantees , so anyway are there any motors that will slot straight in? are most 4 stroke 4 cylinders too big? theres usually a few 600's around thatve been crashed, even a busa locally being sold

Ive seen a website of a fellow here thats put a XR600 into a RS frame, and also the cr500 nsr. Both interesting but im kinda looking to make a managable bike in the end.

So if let me know whats do-able and whats not

Cheers
Tim

Theres already threads going on this topic, but short answer I think is single cylinder 4-stroke like an xr600 motor. Maybe a crf450. Prolly better off watercooled because if you keep the fairings they'll melt, + the engine will cook.

I reckon it'd be prolly cheaper to just stick another original engine in it....
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........."I love the smell of 2-stoke in the morning.......Smells like victory"............

MC21 Pentax SP...... TYGA'D

searched ebay/tradinpost etc etc for a new motor for it as the one in it is fooked

A very precise description

Can't you repair the existing engine
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Poul
"If Life Gets Boring, Risk It!"
MC21SE, KISS box
MC21SP, HRC box, racing loom

Try asking Dietmar Shcultz of RGV Spares (deet250@optusnet.com.au). Although he is in Melbourne - I know he has quite stash of NSR bits. He may have a whole engine or two.
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Jerry Lai
NSR250 [MC21SP]

VTR SP1 fits....
[Allegedly]
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