rmx250 not starting please help!!!!

[FA50 rider]

rmx250 not starting please help!!!!
i have just put my bike back together, every thing is in the right place and works , it has a spark and is getting fuel, but it just wont start! after trying for a while it back fires (loud)
what could be going wrong, its a 2 stroke 250cc 1995
thanks johnnie

[tri boy]

How old is the fuel?

[FA50 rider]

um cant remember how long does it last?

[Reckless]

Try the fuel first thats a good idea. But mostly a bike will start even with old fuel.

But, first you said you have just put it back together so what did you have apart.

[tri boy]

If the fuel is over 4-6wks. Drain the tank, and carb. Mix up some fresh stuff.
Don't throw out the old fuel until you know that was the fault.
Good luck.:mellow:

[cheese]

Clean teh plug adn spray it with some WD40.

[98tls]

Aguy i work with bought his CR250 round the other day......same symptoms as you have.......i know nothing about two strokes but i figured if it has fuel and a spark it cant be that hard........we fucked about with it for ages...nothing..out of desperation i mucked about with either the mixture/idle screw on the carb........one kick and off it went.We killed it many times and first kick away it went .....still dont know what i did but weeks later its still starting fine.

[Reckless]

Thats why I asked what he had apart. Could be timing or simply the floats have got a bit stuck cause he had the carb off. Those 4 srokes sometimes flood and they simply need a bit of time out, and the correct techneque. Bloody horrible things for that.

[Lion]

Had the same problem with my rm, try a new plug.

[FA50 rider]

i have tryed fresh fuel and new plug, i had the engine apart cleaning the power valves

[rocketman1]

Try putting a new spark plug in.
Sometimes the old ones just give up

[F5 Dave]

So it went fine before & not now upon reassembly?

RMX are a little hard to start, have weak spark at kickover, though some models are worse than others, think there was a road legal one with a battery a friend was saying that had to have it charged, memory fading. ..

Either way another plug is worth a try, even 2nd hand out of a going bike. If they get wet fouled a new plug can die. Worth cleaning out the pilot jet in the carb, any crap will make it a bear to start.

If it keeps backfiring it would sound like the woodruff key under the flywheel has broken & moved the timing.

[B0000M]

once again ill say it.

try replacing it with a honda, that seems to fix all the suzuki non start problems ive ever seen

[FA50 rider]

cool thank for that info in the process of cleaning the carb, i have put the plug and tomorrow i will put the carb back give it a try and them try the woodruff key

[RMXMAD]

very unusual never herd of a suzuki not starting...as for bying a honda thats good if you like changing valves all the time..

[cheese]

Only Valves on his bike are POWER VALVES!!

[FA50 rider]

i have tryed every thing that had been surgested and still nothing, any more surgestion????????????????????

[clmintie]

Has the kill switch wire got trapped under the tank and is now shorting on the frame? Happened to me on a TM125 Suzuki, it had a steel tank, every time I kicked it over, I got a shock..... :bye:

[FA50 rider]

na its got a spark and im not getting shocked thanks any way

[clmintie]

One last try... Did you leave a rag in the exhaust port when you put the chamber back on???

[FA50 rider]

no not that ever

[F5 Dave]

Well try a bit of spray ether (engine start) to try it out. Best with airfilter out (& good to have extinguisher handy, but more on a 4 stroke as they can backfire worse).

Boom are you 14? Buy a Honda (Or insert another make) Its as moronic as the Holden/Ford mantra :whocares:

[TerryW]

Is fuel definitely getting into the bike - is the spark plug wet after you have tried kicking it over a few times?

Have you tried roll starting it / pull starting it - that can be one way to get a stubborn bike to start.

I have found that when cleaning out the power valve, if you dont need to have the top apart for doing rings etc, its just as quick to pull the engine from the frame and do it on the bench; saves taking the barrel off and having to replace gaskets.

[FA50 rider]

yea ill try push starting it tonite and i didnt need to take the head off so i saved me self a gasket

[FA50 rider]

went out to try push start it and the pigs came round the corner and told me off only got 1 go and it was on a lose bit of graval sucks ae

[barty5]

went out to try push start it and the pigs came round the corner and told me off only got 1 go and it was on a lose bit of graval sucks ae

who cares just go out try again odds of them being there again very small your only try to start it not ride it down the road

[Reckless]

My advice is your waisting your time floggin it to death anymore. I am making the assumption that it was going Ok B4 you took it apart. You have been tryin to start it for a few days now. A 2 stroke will either start or not, especially if you have tried all the simple things like a new plug etc.
You will have to go backwards over the work you did.
Make sure it has good spark.
Then probably the tank and carb was one of the last things you put on so start there make sure fuel is getting through. E.G. Floats are not jammed closed or open etc etc.
And then on back from there, till you find something you can pin down.
Back firing usually indicates to much fuel that is partially firing or timing is out.

RMX is the 2 stroke isn't it. Not to good on my early Suzukis.

P.S. I very very rarely take the head off the barrell.

[Ivan]

Try what dave said a squirt of Ether,
A new Plug as the plug could spark but when under load it cuts out
Check your timing is lined up properly
Wind the air mixture screw in countinghow many turns record this down and try turning it out 1 and a 1/2 turns,


And my YZ did this it didnt go so what I did was put it in gear and ran with it it spluttered and spluttered and then fired as you may have flooded the crankcase

[FA50 rider]

cool thanks for that info,will try this stuff 2morrow