Its official...save your money By twowheeler (Read 189 times)

[twowheeler]

Bo after installing a 1000K contra the scooter rides exactly the same as a stock contra with 5gr sliders as it does with a 1000K contra with 7gr sliders to get the same rpms.

So the only reason to put in a stiffer contra is if you dont want to buy lighter weights and you happen to have a contra laying around. More snake oil in the pile with advanced cdi's etc...