I've done 3 of those barrels and had some good fun out of them.
I put one on an LI150 S3 with its existing gearbox and ran 46; 17. It had no problems pulling that at all.
Spec was SR185 taken to 66mm (200cc's); 22mm Carb; 42mm Clubman. Inlet was matched to manifold and exhaust raised by approx 2mm and widened a tad. Running in was 10 miles!!!
Went very nicely with no problems
Chris
Help. Trying to setup sprocketing for a 190.
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bristolmod
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Supereibar
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Again, I am not intending to take it to 66mm. I would love to leave it as 64 standard. Also I don't know how to tune barrels, or I don't know how to do any sort of tune. If I touch it, I will probably fcuk it all up. So, I just need something to bolt in and go really... Whatcha reckon? 
