Maintenance & Technical > KX500 Aluminum Frame Conversion (AFC)

getting the power to the ground

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Green Fiend:
Podium,
I think its a problem all 500AF riders face. Keeping the front wheel down ! I keep a finger on the clutch. I constantly have to feather it, especially on the whole shot. I run a 14/47 with a Dunlop 110. Does well hooking up, even in sand. I ride motocross, gearing seem good so far. I might go up to a 48 in the rear to try to stay in third more. Coming out of a corner definitly makes you think twice about gunning it. More than once my tire would be spinning, than hook up. Giving the oh S*** factor. Be safe!

alward25:
Traction is a problem,  I am running 14/50 with a 140/80/18  Michelin S12 xc.  I just dig a trench when drag racing.  Shifting sooner is better too so you are using the torque instead of the horsepower to launch.  Have you tried lowering the front a bit?  Move your center of gravity forward a little should help keep the front down some.

kwakman:
go taller on your gearing, lower rear tyre pressure, move wheel back to lengthen wheelbase, maybe softer shock spring to increase weight transfer, flywheel weight,use rear brake as traction control (you may laugh, but it works!) buy a 250, steal competitors spark plugs, retard ignition to decrease mid rpm hit,which should help, or, all of the above, hth,K.

weymouth399:

--- Quote from: kwakman on September 29, 2011, 12:28:03 PM ---go taller on your gearing, lower rear tyre pressure, move wheel back to lengthen wheelbase, maybe softer shock spring to increase weight transfer, flywheel weight,use rear brake as traction control (you may laugh, but it works!) buy a 250, steal competitors spark plugs, retard ignition to decrease mid rpm hit,which should help, or, all of the above, hth,K.

--- End quote ---
You can put the thick oem head gasket in it, that will tame her in a big way.
A 89 500 I bought had that done to it, it wasn't any fun in the sand pits but was very  leathal on a MX track.

Bob W

awak100:
a 110 is for little girl bikes, need a 120.  I use kenda wasigal, so far it has the biggest tallest widest knobs I've found  use the clutch more coming out of corners

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