Steve Swan
Well-Known Member
Adey
I wouldn't tune up the existing motor as it is a bit of a blind alley, try to find a 1289 or a 1397cc motor they have much stronger bottom ends. 1289's have solid skirt pistons 1397 don't , but are an easier engine to find . 30% more power and importantly torque as standard, and more free revving. you should also be able to do a bit of mixing and matching on manifolding to give you a twin choke carb and a slightly better exhaust which might yield another couple of horses very cheaply.
I wouldn't tune up the existing motor as it is a bit of a blind alley, try to find a 1289 or a 1397cc motor they have much stronger bottom ends. 1289's have solid skirt pistons 1397 don't , but are an easier engine to find . 30% more power and importantly torque as standard, and more free revving. you should also be able to do a bit of mixing and matching on manifolding to give you a twin choke carb and a slightly better exhaust which might yield another couple of horses very cheaply.