Help currently building a short stroke ht5 at the moment was wondering what barrel to use wether to do a lightweight nicasil bore or conventional cast liner also if nicasil what rings to use any suggestions opinions would help thanks jim .

Gday, I'd stick to the cast bore. Nicasil wont give any real advantage in the Ariel and sourcing the correct rings to use might be difficult. At the end of the day you could spend that money on other areas of the engine, eg the head.

Cheers,

Stork

I'd vote for cast iron too,HT's dont run at all hot and Nicosil is an expensive non rebore-able process.I'd spend the money on a reliable spark.

Thanks for that It was a weight issue as well really but iam probably easier loosing the weight .

Wanted 2 pushrods ? why

Gday, you still need the iron barrel to nicasil onto so there would be little gained there. Look for other ways to save weight if that is the main goal, like drilling levers and mountings where possible, removing "excess" frame lugs etc. Good luck, it should be a nice bike when you are done.

Stork

If your budget will allow,go the lightweight route.With ariels keep the weight low down for a better center of gravity. Short stroke alloy barrels made by Mick Dickinson,cost around about