Derestricting a KMX 125

[2StrokeNoob]

Hi there guys,

I have a 2001 KMX 125, as far as I know the only restriction in it is the welded in washer in the exhaust, I'm gonna take it off and chisel it out apparently it's an easy job.

I was wondering if anyone else had experience derestricting a KMX, do I need to remove the protective cap from the airbox? (if there is one).

Any input would be greatly appreciated, thanks

[Easy-X]

A general tip with any carb-based bike: if you remove restrictions to the flow (air in, exhaust out) then you'll most likely have to re-jet the carb.

Think of it like having a bike set up for mountains. You bring it back to sea-level and suddenly it has denser air to deal with and will need more fuel so it doesn't lean out.
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Royal Enfield Continental GT 535, Husqvarna Vitpilen 401, Yamaha XSR700, Honda Rebel, Yamaha DT175, Suzuki SV650 (loan) Fazer 600, Keeway Superlight 125, 50cc turd scooter

[2StrokeNoob]

[Easy-X]

No worries

Tapping in "KMX 125 jet kit" turns up a US company that makes a specific carb upgrade kit but technically you could just get a selection of various jet sizes and play around.

Basically you start with stock jet "X" and get a replacement jet of the same outward size that either has a bigger or smaller hole depending whether you want to richen or lean out the mixture. Fiddling with the mixture screw will only get you so far.

How many jets (there's probably just a main and pilot) and ancillary bits on the carb you want/need to swap out is specific to your year/model/mods.
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Royal Enfield Continental GT 535, Husqvarna Vitpilen 401, Yamaha XSR700, Honda Rebel, Yamaha DT175, Suzuki SV650 (loan) Fazer 600, Keeway Superlight 125, 50cc turd scooter

[redeem ouzzer]

Alternatively you could could just check the parts list for differences between restricted and full power.....
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Be a REAL MAN!

[stevo as b4]

Keeping it all very simple it's:
A spring, a collar, and a different part number exhaust front section that differ between B- restricted bikes, and A-full power.

There's also an 80kmh restriction kit for some European markets where you can ride a 125 at age 16, but it's unlikely to apply to any UK or French market import.

[Kawasaki Jimbo]

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