hi guys, thanks alot for the replies,
jacks906, the thing is that i dont have a rev counter, as instead i have the clock. i have to find an original rev counter that fits instead of the clock.
c18rch, the speed i mentioned are km/hr, sorry here in malta we use km/hr.
i think i solved the problem, i looked at the alternator to see whats going wrong with it as the light was blinking when reving and noticed a loose main. i fixed it and went for a ride...it seems that the loss of power at the said speeds is ok now. cannot understand whats the connection between the alternator and the loss of power at certain speeds.
thanks alot
gil