Just thinking out loud here,

Pros
-Parts can be found everywhere
-Simpler

Cons
-More vibration due to one cylinder
-Alot of fabrication work
-Motor meant for a dirt bike, not meant for the street

Has anyone ever tried doing this? I would probably do it just to be able to find parts easier. How much fabrication work would be involved and would it even be ridable?

Thanks for any input!

I was just talking about the same thing. I have a mc18 and a cr250 just sitting there. Im always putting in other motors in my ysr, so maybe Ill do it if I cant find any more mc18 spares
Bill

CR5's been done, but not heard of a CR250 going in an NSR chassis.

I got good power out of my CR250 Super Retard, but it wasn't an NSR beater.

I think that you need to buy another CR250 motor and glue them together. That'd be worth a laugh.

A CR250 in a YSR chassis sounds like fun.

I loaded the CR250 engine into a CBR150 chassis, but I never really got around to finishing it all off. Then sold the CBR frame, so the 250 engine is still sitting in my workshop

I once chased a honda super dream on my tuned lambretta in the 70's and left it for dead, need i say anymore!!!

I once had the misfortune of riding a 150cc (I think) Lambretta. My mate had bought it but hadn't passed his test yet so I had to ride it home.

After riding this same mate's Vespa once I didn't actually think that I could find anything more nasty to ride, that is until I rode the Lambretta.

Big wheels....you must have proper big wheels!

And what's all this twist grip gear changing lark? I thought that was reserved for the Raleigh Grifter.

No comment !!!!

Have you got one of those long Parkas with the furry collar too Leigh?!
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Andy.
NSR-WORLD.COM

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Not yet, a nice aerial and a foxes tail is top of the list

On a more serious note I am going for a nice original restoration with no fancy stuff, just a nice 60s classic 2-stroke, at the moment its almost in bits waiting to be blasted and painted.

Enough said, two strokes rule cc's for cc's there ain't no comparison!!

First time I went to Chinatown in Bangkok I was shocked at the nmber of Vespas and Lambrettas still alive and kicking.

Confession time.

I did actually make an attempt to port my mates vespa. We got a noisy pipe and I did some filing on the exhaust port and slowly but surely lapped about 0.2mm off the head using his old man's valve grinding paste against the shed window. It did go better, but it might have just been the pipe. I was spotty and 17 at the time and was the Wendover Two Stroke Guru!

It sounds like the knowledge you gained back then Matt wasn't wasted, and i'm glad to see you still remain a two-stroke convert to this present day.