Author Topic: Only runs with enricher, dies with throttle  (Read 307 times)

Offline jonathanrobertbolton

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Only runs with enricher, dies with throttle
« on: October 31, 2020, 11:45:58 am »
Alas, I have not been riding my 2000 like I should (in my defense, I've had seat time off the road on a KLR for the last couple years). As a result of my negligence, I think it sat too long and the fuel maybe went bad.  :( It was a really rough and smoky start at first, but eventually it cleared up and started revving up, but when I cut the enricher, it dies completely. Same if I give it basically any throttle at all. Was hoping a pro here might help with a diagnosis?

I did try and let it run for a bit with a fuel additive, but didn't help.

Thoughts on some things to check for? Any additional info that might be helpful?

Offline DC Concours

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Re: Only runs with enricher, dies with throttle
« Reply #1 on: October 31, 2020, 12:15:05 pm »
Two years of sitting with untreated fuel?!?! You'll need to tear down the carbs and  manually clean them.

Offline greenie

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Re: Only runs with enricher, dies with throttle
« Reply #2 on: October 31, 2020, 07:31:26 pm »
Siphon the old gas out, add new gas, drain the bowls... You never know - it might clear itself. Go easy on chemicals - too much can damage carburetor internals. 

Offline VirginiaJim

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Re: Only runs with enricher, dies with throttle
« Reply #3 on: November 01, 2020, 06:26:47 am »
An optimist, eh?  LOL.  The carbs are going to need to be cleaned out as well as everything else associated with the fuel system. 
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Offline connie_rider

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Re: Only runs with enricher, dies with throttle
« Reply #4 on: November 01, 2020, 09:39:13 am »
Very doubtful that a drain and flush or a drain and add chemical will do anything.
The low speed jetts and passages are probably blocked.
And/or the float valves are frozen.

Ride safe, Ted

Offline greenie

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Re: Only runs with enricher, dies with throttle
« Reply #5 on: November 01, 2020, 06:35:45 pm »
Start with the easy things. A couple of gallons of gas is what.. $4.50? It worked for me once.

Offline m in sc

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Re: Only runs with enricher, dies with throttle
« Reply #6 on: November 01, 2020, 07:24:25 pm »
clogged pilots. time to pull them for sure.

I break and fix stuff.  99&2k c10s and a bunch of vintage stuff.

Offline Boomer

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Re: Only runs with enricher, dies with throttle
« Reply #7 on: November 02, 2020, 06:59:53 am »
If yer lucky, it's just bad fuel.
If yer not, then the carbs need doing.
Personally, after leaving her sitting for that much time, I'm betting fresh fuel will improve it, but you will still end up needing a carb clean.
George "Boomer" Garratt
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Offline DavidMN

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Re: Only runs with enricher, dies with throttle
« Reply #8 on: November 02, 2020, 09:46:13 am »
I've seen this many many times since 2009 when I started fixing bikes for people. It's plugged idle jets. The gas in the carbs always gets rotten and the jets get varnished. The only way to fix them is to take them apart. If the tank was over half full that gas is probably okay. If you bring me the bike I'll fix it for you for $27/hour, usually $200-$300. That would include pulling them, fixing them, reinstalling, and tuning. A petcock repair or tank cleaning or other repairs would be extra. They always run real nice when I'm done.
2002 ZG1000