Maintenance & Technical > KX500 Original
Decreasing power for newer 500 owners
Friar-Tuck:
Thanks Guys,
There have been several folks in the past that either by hook or by crook ended up with a K5.
Another type of guy looking for that kind of OOmpf is someone over 275lbs. I think.
Any way, thanks for taking the time to jump in, it may help out someone trying to take control of the bike
who didn't realize what they were in for :-D
Tuck\o/
Polar-Bus:
--- Quote from: Friar-Tuck on April 08, 2010, 05:44:56 AM --- I know this is not orthodox. I (like I'm sure most other folks) have spent my time searching out how to increase performance, not taking it out.
The best scenario is getting the bike having had a good bit of expierience. Sometimes it just doesn't work out that way. So for whatever reason an owner finds themselves piloting these things, what can a new owner do to de-tune the engine to a more controlled experiment without doing any permanant damage to either themselves or the engine.
Re-gearing the sprockets for more top end.
(Which seems contradictory, however it does decrease acceleration.)
A throttle with a cam (for more than a 90 degree idle to W.O.T.)
and increasing the amount of free play in the throttle. (Making it an effort to actually get the thing W.F.O.)
I thought about either an additional base gasket & or an additional head gasket. Reducing compression.
Would the base gasket just move the timing or not be worth the effort.
Another Idea I had was to adjust the power valve to less than optimal engagement. It would still move (preventing carbon fouling) but kick in a tad later with less than maximum results.
A set of fiberglass reeds ( less tesion ) and setting the ignition timing to the center mark on the stator plate.
And lastly, using a less than perfect expansion chamber.
I don't think any of this will actually do any damage to the engine, and reversing the process one step at a time may be alot less intimidating.
If anyone else has any suggestions or comment on the stuff I could think of please post up.
Tuck\o/
--- End quote ---
Add an exhaust restrictor washer between the exhaust pipe and cylinder. I did this to my son's KX65 when he was first learning how to ride. Worked awesome.
Chod:
Tuck-In some ways they alresdy have Tuck, Think about it?
KXcam22:
The two easiest methods are to bend in the reed stops. This reduces the fuel intake and power. The most effective is blocking the exhaust. A simple restrictor can be made to fit inside the silencer end. The washer in the exhaust port works but it needs to be fairly thin and the diameter must be exact. Cam.
Rotorised:
If you've got a dinged up pipe that would help. Maybe throw in a few more dents for good measure hahaha
I remember when i stacked my bike and bent in the pipe badly it lost ALOT of power.
Mind you that pipe was completely stuffed and had to be replaced after that.
So I think a few strategic dents may make for a smaller power loss.
But i think it also made it harder to start, which is never good for a beginner hahaha
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