Question by mikey b: why does my aprilia pegaso 650 jump in first gear?
when setting of upto 2000rpm the bike jerks and jumps like a kangaroo,but pulls fine in all other gears.i have recently removed/cleaned/reset carbs to eliminate mixture problems,but it is no different!
please can you suggest any further mods(the bike is a1999 model with only 12000miles)

Best answer:

Answer by mybuttstinks2001
Clutch!

What do you think? Answer below!