02 ec 250 starting problem

[ks9mm]

Hello gang,

Trying to help out friend of mine who just got 02 ec250 and has a hard time starting it.

Bike will start after some serious kicking. Will always start. But Hot or cold it will take some serious kicking. Choke does not make it easier to start when hot.

It will idle fine, but that can just cut of. Very abruptly. Raising idle does not help. But i did not raise idle to screaming levels. It will idle fine and then just cut off.

Once moving, it's a beast. Hard to keep front wheel down. Seems to have almost same amour of power as my 300.

Headlight is always off.

I would appreciate any suggestions.

Thanks a lot!

 

[gassergrant]

have you tried to clean the carb and make sure its set up correctly ie slow jet main jet. clean the filter too
try a new spark plug just eliminate that em some time if the ring are worn they become hard to start like my bike did.
just some ideas for ya

 

[hamilton]

have you tried to clean the carb and make sure its set up correctly ie slow jet main jet. clean the filter too
try a new spark plug just eliminate that em some time if the ring are worn they become hard to start like my bike did.
just some ideas for ya

Check the reeds also.

 

[ks9mm]

Thank,
Will try to take it apart and clean out and put new plug in. Old plug looked pretty good to me.

My concern is that it shuts of at idle. Would run ..run..seemingly fine and then just cut off, instantly.

Guy who he bought the bike from said that engine had new top end recently...but I guess it's worth taking a look inside.

What's the best place to get complete gasket kit? Top end gasket kit?

Do you think air leaks from crankcase can cause this?

 

[ks9mm]

Check the reeds also.

Thanks, what should I be looking for?
Both of us are new to 2 strokes.

We switched from 4 strokes.

 

[gassergrant]

two strokes are easy mate a lot less stuff to go wrong.
you can just get a base gasket and leave the head on. did the fella give you any receipt for new pistons etc
its a carb or plug I bet ya. strip and wash the carb in old petrol and blow out with a air line if not you can get carb cleaner in a spray can.
set the mixture screw to 1 1/2 turns just pull the dial screw and check its not damaged

just a few tip and some bits to look at where in this wide would are you from

 

[gassergrant]

here is a manual to help with the carb http://www.gasgasmotos.es/en/manuals/models-2-2003.html

 

[ks9mm]

Thanks! Will try that first

Waiting for bit of a warm weather... It's freezing here in NY..

 

[gassergrant]

No worries good luck, just wondering if its so cold the bike has trouble starting ???

 

[ks9mm]

No worries good luck, just wondering if its so cold the bike has trouble starting ???

We rode only twice since he bought the bike, both times it was barely above freezing with snow on the ground. But above freezing. I would say no more than +5C

 

[ks9mm]

So things are much better now. Still not one kick bike, but not 20 kicks either. With proper tdc positioning, it will start first or second kick now, when hot.

I cleaned out all electrical contacts, put new plug in and cleaned out carb. Pilot jet and main we're both not looking good.

We also repositioned kicker bit higher.

I really hope that's the extent of the problem.


Thanks a lot for the tips!!!

 

[gassergrant]

So things are much better now. Still not one kick bike, but not 20 kicks either. With proper tdc positioning, it will start first or second kick now, when hot.

I cleaned out all electrical contacts, put new plug in and cleaned out carb. Pilot jet and main we're both not looking good.

We also repositioned kicker bit higher.

I really hope that's the extent of the problem.


Thanks a lot for the tips!!!

Happy days. My bike wont start on the first or second kick it back fires first about third kick then starts on the button
But the ring were fooked lol

 

[ks9mm]

Bike can backfire on second-third kick sometimes, but fire right up with a TDC positioning.

What's the reason for backfire?

 

[gassergrant]

I don't know about that in a 2stroke mate never looked in to it as it has never bothered me

 

[Mudshark]

Make sure carb clamp is good and tight on the reed side. You could be sucking air.

 

[gassergrant]

im sure it is. maybe to tight

 

[ks9mm]

Update.

Replaced and cleaned entire pipe. Replaced airfilter. New plug with correct gap.
Had first real ride today. 30+ miles only one issue.

Will start separate thread on it.