kmx125 wont start

[scottc1088]

my kmx 125 wont start, iv just got it off a mate cheap, it has a good spark and very good compression!
but when he had it he set the carb on fire but put it out stright away but the fuel pipes were no good! can someone tell me where the pipes go
also i think fuel is coming out of the overflow(so im told), could this be why its not starting
hope you understand
thanks
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2000 Derbi Senda R, Malossi 80cc, evolution n.g. full circle race crankshaft,26mm carb,Malossi mhr exhaust,TNT filter,Hebo reedblock + carbon reeds,Alien front light,Kundo 330mm rear shock,13-53
Breaking 2000 senda r

[stinkwheel]

If fuel is coming out of the overflow either the float is sticking (try gently tapping the side of the carb and see if the fuel flow stops), float height is too high or there is damage to / something in the needle valve.

In your case, it is also possible that the fire could have damaged the folats which are most likley made of plastic.
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“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[scottc1088]

ill try and check tomorrow to see if fuel is coming out but shouldnt it still run anyway?
my m8 had put a pipe from the overflow to somewhere else on the side of the carb
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2000 Derbi Senda R, Malossi 80cc, evolution n.g. full circle race crankshaft,26mm carb,Malossi mhr exhaust,TNT filter,Hebo reedblock + carbon reeds,Alien front light,Kundo 330mm rear shock,13-53
Breaking 2000 senda r

[scottc1088]

anyone else got any ideas??
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2000 Derbi Senda R, Malossi 80cc, evolution n.g. full circle race crankshaft,26mm carb,Malossi mhr exhaust,TNT filter,Hebo reedblock + carbon reeds,Alien front light,Kundo 330mm rear shock,13-53
Breaking 2000 senda r

[Frost]

Well worst case scenario... look on ebay and see if you can find yourself a KMX carb. shouldnt cost more than £20.

[scottc1088]

thats what i was thinkin, ill have a mess around with it 1st tho
if theres spark and compression then its got 2 be the carb right??
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2000 Derbi Senda R, Malossi 80cc, evolution n.g. full circle race crankshaft,26mm carb,Malossi mhr exhaust,TNT filter,Hebo reedblock + carbon reeds,Alien front light,Kundo 330mm rear shock,13-53
Breaking 2000 senda r

[RascalsCustar...]

Blimey. Must be your lucky day. I've got one of those (carb) stripped out on my kitchen table...and another one on another of my other kmx's which'll be i'll be striping tomorrow. Buggered float needle I reckon.

Can take a few pics if it's any help so you know what you're doing with yours, if you decide to strip it?

None of the hoses attached to the carb should go back into it. They should all be exposed to the atmosphere.

Saying that those carbs seem to suffer badly from getting clogged main jets. The one above that I pulled out a kmx that's been standing for months, was caked in gunk.

[scottc1088]

i stripped it down n cleaned it out earlier 2day
and the casing on the side that says kips on it was leaking fuel????
so i ad a look n there was only half of a gasket so i made one outta card, didnt bother kicking it up just tryed bumping it n it blew loads of petrol, oil n other shit out of the exhasut then started (it starts wiv the kick now tho)
the throttle cables melted n it doesnt return to idle it jus stays where you pulled it to even if you push it back but iv just ordered one of these
thanks for youl help
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2000 Derbi Senda R, Malossi 80cc, evolution n.g. full circle race crankshaft,26mm carb,Malossi mhr exhaust,TNT filter,Hebo reedblock + carbon reeds,Alien front light,Kundo 330mm rear shock,13-53
Breaking 2000 senda r

[scottc1088]

also is the throttle cable the complete kit which splits into 2 for the oil pump or is it 2 seperate ones?
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2000 Derbi Senda R, Malossi 80cc, evolution n.g. full circle race crankshaft,26mm carb,Malossi mhr exhaust,TNT filter,Hebo reedblock + carbon reeds,Alien front light,Kundo 330mm rear shock,13-53
Breaking 2000 senda r

[RascalsCustar...]

No worries matey. I got 2 of the bloody things.

[RascalsCustar...]

Should be 1 cable with a little plastic bit where it splits into 2 cables. As you said, one for the carb, the other for the oil pump.

Make sure you get the freeplay adjustment right for the oil pump though eh...

[scottc1088]

ok cheers, shud b ready tuesday
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2000 Derbi Senda R, Malossi 80cc, evolution n.g. full circle race crankshaft,26mm carb,Malossi mhr exhaust,TNT filter,Hebo reedblock + carbon reeds,Alien front light,Kundo 330mm rear shock,13-53
Breaking 2000 senda r