rmx250 not starting please help!!!!

**FA50 rider** · 20th June 2007, 16:24

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** · 20th June 2007, 16:46

How old is the fuel?

**FA50 rider** · 20th June 2007, 20:42

um cant remember how long does it last?

**Reckless** · 20th June 2007, 20:47

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** · 20th June 2007, 20:59

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.

**cheese** · 20th June 2007, 21:05

Clean teh plug adn spray it with some WD40.

**98tls** · 20th June 2007, 21:12

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** · 20th June 2007, 21:21

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** · 21st June 2007, 07:25

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

**FA50 rider** · 21st June 2007, 18:58

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

**rocketman1** · 21st June 2007, 19:59

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

**F5 Dave** · 22nd June 2007, 12:37

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** · 22nd June 2007, 18:28

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** · 22nd June 2007, 21:15

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