Dinnae worry about the engine,,it wont blow up......yel know yersel in yer water how hard yer pushin it...its a single remember,,its about tourque rather than performance in every gear,,, but it can pick its heels up when ye want it to. dont look fur speeds much oer the ton, ifye wanttae prelong yer engine... i sit at 75/85 most o the time,,an its absolutl;ey fine at that... sometimes when am in a hurry i race it thru the gears but thats only an odd time.. we need tae meet up an a kin talk wi ye face tae face...its easier.. but it wont blow up.