I bought a 2000 EG that has been sitting for a couple of years. It will start and run, but won't idle. I took it down the road about half a mile and it yellowed the pipes. It has fresh gas in it. Does anybody know where I can start???

 

Obviously (by the pipes coloring) a fuel restriction, contaminated fuel ot taking in too much air.

I'd dump all of the old fuel and out some fresh high octane fuel with some Seafoam.
If it's a carbed engine I'd pull the carb and disassemble it and give it a good cleaning and blow it out thoroughly with an air hose.

I just had a similar issue with my '98 EVOand it took me three times to get the carb clean and working properly.

With older bikes you may want to change the intake gaskets.

Good luck and let us knowhow it works out for you.

 

Check your intake seals. If it's been sitting, they are probably dry and brittle. If it's injected, try spraying seafoam straight down throttle at a high idle. MM injection can be touchy, especially if it has sst very long.

 

it is injected. I'll check the intake seals tonight

 

Please translate "a couple of years".
Was bike parked and protected from elements for 5 to 10 years?
It could be bad gas, or seals someplace...Even the fuel lines get brittle and break-up from inside out..
dump gas and get new clean gas to start along with new spark plugs.

 

It has fresh gas in it. Has new plugs. I replaced the intake seals, even though I saw nothing wrong with them. I pulled the intake back off and I'm soaking the injectors tonight. Any other ideas?

 

engine temp sensor can cause bad idle or the engine idle control can be stuck.
Corroded connectors at ecm..
Look at throttle body, engine idle control...is every smooth, clean no rust?

 

I'm losing fuel pressure. Pump comes on, supply hose in the tank swells up, pump cuts off hose goes down. All with bike not running. Can't see any holes in the hoses. I guess I'll replace all of them and the filter unless somebody has a better idea