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sorry guys,ive been away for a while,had the motors pulled down and valves are fine,infact the whole motor is fine,Recently got a gpx140 and same thing again........? turns out that the cdi's are ****,mechanic said that its like the rev limiter is coming in way to early before they even rev...

at our local junior tarck and i have my own speedway track at home,have a few karts with these yx 150 engines in them to which go pretty dame good on a speedway track mate

yea i have put the motor back in my x4r until i get the engine going right,then i will put it back in the solo

would a yx150 stator fit?

hes still got it mate,so i havent heard back,am i still waiting on the new stator,can you get high quaility stators for these engines,The shop is good about it,he put $300 towards a new one for me which is the one they doesnt go but thats not his fault.I dont mind fixing it as i just want to...

Ok,maybe show me yours too

Well I'm not mate! It's not hard putting any bike together for me,been around bikes for a very long time but I did give it to my mechanic for another opinion,so I have put it together right as he checked everything! You keep saying there's no way ya can get 2 dud engines.......anything is...

dont thinks its minor?

well the mechanic got it running and it run like a dog like i said and then it lost spark completly,changed coil,hen cdi and then wiring loom and still no spark still,It has always had spark for me but now that it doesnt it tells me it must be running out of good spark after mid throttle causing...

its possible,but there must be a remedy surely,let ya know what my mechanic finds on saturday

so far new coil,new cdi,new spark plug and new wiring loom,still the same crappy result......head look on saturday

also have ordered a new wiring loom

brand new cdi and coil and carb,geting the head pulled down as i believe the valve isnt seating right,will let ya know what happens,its way worse than the 1st engine by far.....at the end of the day it shouldnt be like that at new as i have bought yx engines in the past and had no probs with...

well got a new engine and same again???????starting to wonder if these engines a luck of a draw

Not this one

Yes they are

would a real mikuni 24mm carb from Braaap work on this engine?

good point but if it was damaged wouldnt it come out of the overflow instead? i have tryed the molkt 26mm and oko 26mm and mikuni 30mm,all brandnew carbys,and all do the same thing.....? the oko 26mm runs fine on my yx150 so that tells me the float level and carb are fine,run a 100 and 38 pilot...

I'm positive it is Yes

Read my 1st post mate