I think it would be a good idea to get the reliability sorted before worrying about more power. Would the internals of the engine cope with a power increase. If you really want more power easily why not add a nitrous system or if you are an engineer why not try supercharging the engine, a good winter project for someone.
I do not know if any of you belong to the Morgan 3 wheeler club in the UK but they used to /still have some b. clever tuners who used to race 3 wheelers regularly and they were very fast. Just a thought.
