When i start up my sled when it's cold, it runs on one

[indy_500]

when my sled has been sitting for at least a day and it's cold, it runs on one cylinder. i shut it down and start it again then it runs on both cylinders. it's done it 3 times. i never turned the gas on and ran it out 3 weeks ago and i don't know if that's affecting this. but i assume it's a carb issue or possibly something else? dealer said the compression was good 2 weeks ago. i changed the plugs with new ones. i just keep riding it since i get it to run on both and it ran fine for 130 miles yesterday.

 

[indy_500]

it does have a primer on it if that makes a difference

 

[whitedust]

Indy as long as you are not flooding it with primer & you have good compression then you may have plugged jets. Better get this running right to avoid lean condition

 

[indy_500]

after i shut it down and start it again it runs on both, and i rode for 130 miles and nothing was wrong, how do i check to see if i have plugged jets?

 

[indy_500]

the part i just don't get is it doesn't do this when i'm riding it or i go to start it up after i ride it a while, i guess after i ride it some more i'll find out

 

[scottiking]

sounds like the one carb is leaking back or the float needle lets it sifon back or out!

 

[indy_500]

i did run it out of gas and i thought i mighta got the needle stuck when i did that. the dealer synced the carbs so i don't know what to do/say. i guess after riding it some more i'll find out!

 

[whitedust]

Dealer should stand behind his work ask him to help ya.

 

[dab102999]

Are your plugs solid top or screw on? If screw on make sure there are tight.

 

[doo_dr]

If it runs on both after restarted try to determine which cylinder is firing first. feel the Y-pipe near the cylinder. When you have determine which one is firing on the first pull let it cool again and before restarting switch the plugs. If the running cylinder follows the spark plug you have a plug that is either starting to foul or has been mis gapped. Possibly junk on the electrode. If it stays with the cylinder shut it off and let it cool down again. Before restarting swap the plug wires. Don't worry, Almost all 2 Strokes "batch fire" so you can switch them. If it follows the plug wire you may have a plug wire, cap, or coil starting to fail. A resistance test will help. One last thing you may want to try is to take the plugs out before you start the sled and preheat them. Depending on compression, fuel, plug gap and electrode condition, you can literally blow the spark off the gap on cold plugs and cause your problem.

 

[indy_500]

if i let it run on 1 for a while, both kick in after about 5 seconds. this morning when it was cold, it started right up on both and ran for another good 100 miles. so 230 good miles this year on it.

 

[xcr440]

You are almost describing a perfectly normal 2-stroke cold start. They sound like they are not running to well, almost 4-stroking, because they are COLD. Just keep it idling if it seems to not want to, and let it warm COMPLETELY before getting on it much. Slow rolling after a good 20-45 seconds isn't all bad. Couple miles of easy throttling up and down and she'll always run like a top.....Just like you are experiencing.

Oh yeah, spinning the track on a stand a little to warm it up is a good idea as well, but we all know that, right?