i have piaggio nrg power DD 2005,4.5grm rollers and recently fitted a leo vince tt from my mates aprillia sr onto it , it did go quick but was loud so i repacked the silencer and now it seems to have lost power at low revs if i come to a junctiion and go full throttle the engine nearly cuts out before it eventually starts reving and going faster and on a hill i would be at the top quickr if i pushed it theirs no power untill i get 2 8,000rpm would a mallosi variater and clutch help with low end power

simon, July 2009

i tried my standard and laser x again and it just seems to vibrate alot wen i open the throttle with all the exhausts now without the revs increasing so no power untill about 5 seconds after i initially pulled throttle and tries to cut out sometimes 2 wen throttle opened and i noticed it ticks over at 2500rpm and its meant tick lower then that could the clutch or variater be worn out and if so r mallossi ones any good the rollers r new and so is the belt witch is mallossi lso the pipe that goes to the secondary air thing from exhaust is it meant to be blocked up wit sport exhausts on thanks 4 ur help its apriciated(think that how 2 spell it)

simon, July 2009

its the exhaust pipe mate,there isnt enough back pressure to make it run right you could try lighter rollers if that doesnt work put the old pipe back on.seen it loads of times

adam bike doctor, July 2009