i have a viper exhaust at the moment ive been told they suck hard lol. im wandering what rollers you owuld recomend for a viper exhaust on a yamaha aerox. i know you havent seen the bike ride or anything but what would normaly be used. is it heavier rollers for mroe top end and lighter for acceleration?
Not exactly the lighter the rollers, the more the bike will rev in relation to the speed. the heavier the less it will rev. your best compromise is to make the bike rev to it's peak power when its cleared the clutch but before it's come to the end of the variable transmission range. if the bike revs too hard it will pull away poorly, if it dosnt rev hard enough you will get the same effects and top speed will be compromised. on a stock 50 with exhaust i would guess you would be wise to start at 5grams and see what the engine revs like. before doing this though, make sure your engine is in good running condition (no air leaks from the seals or manifold, reeds are ok, air filter is clear, carb is clean, choke is working correctly, tyres are inflated, brakes are not sticking etc...
