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Old 10-28-2015, 01:38 PM   #1
Rgprestige15
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Vstrom running rough

I've been resurrecting a vstrom 1000 that sat for years.

So far I've replaced all the fluids, cleaned the tank, new plugs, and installed an ebay fuel pump. I also cleaned the throttle bodies as they were gummed up real bad.

The bike fires right up and idles fine and revs fine sitting in neutral, however it runs real rough under load. The bike surges real bad with throttle inputs, bucks, and dies when I pull in the clutch to stop. I just put seafoam in the tank. If the seafoam doesn't clear it up, I will verify spark and fuel. Anyone have experience with bikes that sat for extended periods of time with these symptoms that can suggest the best steps to take?
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Old 10-28-2015, 02:35 PM   #2
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Would definitely replace the battery regardless of whether or not that is the problem. A bad battery can cause the bike to idle fine but run rough.
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Old 10-28-2015, 02:44 PM   #3
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might want to look at your ebay fuel pump...
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Old 10-28-2015, 02:51 PM   #4
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On my TLS, (basically the same motor) if the TPS is off the bike will run like ....YouTube TPS, that might help
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Old 10-28-2015, 03:09 PM   #5
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Thanks for the replies I'll look into the throttle position sensor (been through TPS issues with a GSXR) and I'll run a flow test on the fuel pump. I have a spare battery I can swap in and try that was verified to be good.

I'm also think the injectors need to be properly cleaned. When I pulled the TB's to try and free it up (all gummed up), there was nasty several year old gas sitting in all the lines and powdered gasoline varnish or something. I tried to clean it best I could. I know a guy with an ultra sonic cleaner I could pay a visit to.

Hopefully I can get the bike rideable. Right now it's like an unpredictable rodeo animal.
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Old 10-28-2015, 09:03 PM   #6
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Check your air filter housing. The intake scoop/hood/whatever you want to call it is a great place for a mud dauber nest. Same goes for the mufflers. The outlet is only 1" diameter, and those SOB's will plug exhaust up, too.
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Old 10-28-2015, 09:43 PM   #7
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Pull and clean your injectors.
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Old 10-28-2015, 09:44 PM   #8
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is there a fuel filter? Could be clogged as well
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Old 10-29-2015, 09:12 AM   #9
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Quote:
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Check your air filter housing. The intake scoop/hood/whatever you want to call it is a great place for a mud dauber nest. Same goes for the mufflers. The outlet is only 1" diameter, and those SOB's will plug exhaust up, too.
I changed the air filter and everything looked clean, but I'll poke around again and check everything.

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Pull and clean your injectors.
Thanks. Will definitely be doing this. Will report back after with results!

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is there a fuel filter? Could be clogged as well
My understanding is that the fuel filter is integrated in the fuel pump on these bikes. I've read about a lot of people bypassing it and going with an inline filter.
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Old 10-29-2015, 09:24 AM   #10
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My understanding is that the fuel filter is integrated in the fuel pump on these bikes. I've read about a lot of people bypassing it and going with an inline filter.

I did this on my TLS...easy and quick..took about 30 mins..just be sure that you are buying a hose that is rated to be submerged in gas because you will have to bypass the filter in the tank
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Old 10-29-2015, 09:38 AM   #11
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When you pull the fuel delivery rails off, you might as well replace the rubber hose and clamps. The crimps aren't the best, so jostling during removal will probably make it leak. The hose is a maintenance item, anyway. I think the hose is 5/16". Just make sure you get injector line and match the length exactly. If you don't, it'll change the angle of the injectors and can cause a leak.

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Old 10-29-2015, 11:11 AM   #12
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Did you sync the throttle bodies after cleaning them?
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Old 10-30-2015, 12:11 PM   #13
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Quote:
Originally Posted by pinball View Post
When you pull the fuel delivery rails off, you might as well replace the rubber hose and clamps. The crimps aren't the best, so jostling during removal will probably make it leak. The hose is a maintenance item, anyway. I think the hose is 5/16". Just make sure you get injector line and match the length exactly. If you don't, it'll change the angle of the injectors and can cause a leak.
Great info Thanks man. Removed all the body work and flow tested the fuel pump before I removed the tank. Next up is to pull the TBs when I have time.

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Did you sync the throttle bodies after cleaning them?
I did not sync the throttle bodies. I just pulled them out to free up the gummed up area around the return springs on the actuators (throttle was not returning on its own). Didn't take anything else apart after pulling them as a unit, so do they need to by synced? This is a subject I don't have any experience with, nor do I have a vacuum balancer gauge.
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Old 10-30-2015, 12:53 PM   #14
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I would sync them. Have seen bikes running very lumpy and all due to TB balance. No way to know state of their balance prior to bike sitting.

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Old 11-02-2015, 02:20 PM   #15
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I just put the bike back together after giving the injectors an ultra sonic clean. I'm thinking it's back to 100%. Thanks to all who replied!
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Old 11-19-2015, 08:20 PM   #16
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Hey RG who cleaned your injectors I have a 2003 gsxr 600 thats been sitting for a while starts up but is super rough and I need all the help I can get. Does anyone know someone near Pearland that can tune it up.
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