Maintenance & Technical > KX500 Original

KX500 power delivery ? how to make it longer ?

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Polar-Bus:

--- Quote from: davidvak on July 25, 2007, 09:28:29 AM ---Any advice on how to make the power delivery a bit longer ?


--- End quote ---

Add a flywheel weight. The not only smooth out the wicked bottom end hit, they also create a lenghtened over-rev from the added crankshaft spinning inertia. My 500 has an amazingly wide linear power curve!

davidvak:
Great! Useful info !
In the past i had RMX250 and KTM 300 , i could change power delivery playing with
the power valve, loading the spring ect... is it possible to this on the KX500 too ?

where would you recommend me to buy the reed and flywheel ??

gowen:
How much money do you have to spend? There are endless things you can do to lengthen the powerband. Some cheap and others very expensive. The port job and restarding the timing is a great idea for cheap money. Also, I'm a bit suprised that it is all grunt. How bad does it smoke, pop, surge, ect? How do your plugs look after riding?

BDI:
I had a fmf pipe on my old kx500 I hated that pipe It would just go flat on top and quit pulling. No matter how you jetted It the motor would never seem to peek out In rpms. My favorite pipe I ever used was the pro-circuit pipe good power all over and It would pull for ever on top the rpms seemed to keep climbing and climbing as long as you held the throttle wide.that pipe really works good and lets the K-5 motor screem.That pipe always made me smile ear to ear. If you test those two pipes back to back there Is no mistaking the difference In over rev Its night and day.

davidvak:
yes it is smoking a bit more then normal, i use Valvoline oil and mixture is 40, (2.5%),
it appears to be jetted ok but takes much to get into working temp, i use 175 main and 48 pilot.

i don't have a big budget, i think i would go for carbon reeds, and next time i replace piston
i will do the port job. what else ????

i would love to get also the PRO CIRCUIT pipe but for the moment this FMF system will be my
call  :roll:
 

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