[marchesini]

My 748SP racebike engine (ex Skidlids, ex Old Yella) is presently in bits for a bit of investigation work. It wasn't very well after the last outing at Brands and it seems that it needs some new pistons and crankshafts and a few other internal organs. Now, excuse my (very) limited lack of knowledge on subjects such as this but while it's in bits, is this a good time to 'upgrade' some parts.

For example, what goes into making the 748 into an 853(??). Very happy with the handling but wouldn't mind a little more grunt at the lower end of the rev range. Above 6-7000, it's wonderful but get the gearing wrong and nothing much really happens. Not looking to spend mega bucks but more of a case 'may as well while it's in parts' scenario. Not really sure what it needs at present but I want to make good use of it this season so a good going over is in order.

Suggestions and costs greatly appreciated.

Thanks all

simon