Hitchcocks Forum

can any one tell me if I can fit the 500 barrel and piston to the classic 350 many thanks.

its not impossible as most things arnt but you,ll need more than barrell and piston if it was so easy noone would have a 350 imho buy a 500 engine probably cheaper than uprating the 350 although some will say get one of the other guys his name fails me 450 kits atb paul

to grunda 12,
Yes thought that might be the case pity,

Gravelrash,
it is a very simple conversion, all you need is a pair of 500 flywheels, 500 conrod and big end bearing,500 barrel,piston,head, pushrods, plug the existing cases where the barrel studs screw in, then move the stud holes out to suit the 500 barrel and also open out the throat of the cases, as Paul says anything is possible

You can get a 450 conversion done - not cheap though.
450 conversion
Probably cheaper to swop bikes or at least engines. The 500 does fit on the 350 primary/gearbox OK

thought of the name tollgate classics i have seen some of his handywork i.e the 450 and the bike i saw was no better than a 350 infact my 350 grunda 12 ate it for dinner and the riders comment was i didnt build this bike to ride like this i thought what a tosser i ran my 350 flat out everywhere i went and now under its new name black betty noel ogri does the same infact im fitting a velorex sidecar to it next saturday so that he can be a member of our combi club happy days paul.

--------- and if you DO manage to convert it to 500cc then it'll cost you more ROAD TAX as well!!---------------- I'm thinking of "down-rating" my 500 to a 350 for that very reason---if you get my drift ??

from gravelrash to all that replied to my query.

thanks very much fellas great detail, I had been comparing specs in the workshop manual which made it appear relatively easy. As you all suggest finding 500 engine would be best, problem is I live in Corfu and Enfields are not common.

Alan, is it worth it just to save £20.00 a year?

Gravelrash,
The 350 is a lot nicer engine unless you want out-and-out power. There is quite a lot you can do to it to increase the umph without resorting to changing the engine.