How to make the KFX50 faster?? (possible diagrams)
Both restrictors are right where the manifold bolts to the cylinder. Remove the intake at the cylinder and turn upside down then look. You will see a slotted disk. I used a big screwdriver and turned it. It popped right out. Others have resorted to torches to heat up first but I didn't have any problem. On the exhaust side, unbolt the exhaust pipe from the cylinder and you will find a washer. Just remove the washer and bolt back together. You WILL need to rejet the carb. I would recommend going to the dealer and getting 60, 65 and 70 size jets just to make sure you have a good spread. If your dealer doesn't have them, they can be found online. While you're at it, you might want to drill some holes in the air box or get a K&N filter or Uni Filter for it. CT Racing has a pipe kit with a high compression head that really wakes these little bikes up. I highly recommend it. Comes witht the K&N filter, jets, pipe and head for about 5 bills. If you don't mind spending the money, Works makes a set of shocks that just about doubles the suspension travel. You might need it since the new top speed is near 25 mph (22-24 is what ours does). BTW, to avoid any confusion, the Suzuki LTA50 and Kawasaki KFX50 are the same bike. Your little rider will be beaming once s/he tastes the new power.