I'm replacing my front and rear sprockets and chain. Took off the sprocket cover last night and found what must have been an inch of brown grime splattered everywhere (most likely 15 years of chain lube flung). Should I bother cleaning all this or leave it be?

Second, I'm planning to use some Seafoam. I know the most obvious application is putting some in the gas tank. However, on my previous cars I've always sucked some through a vacuum line, let it die it, wait a couple minutes then fire it back up. Is this at all recommended with a GS? If so, what vacuum line would I use and where is it?

Quote from: dwoloz on June 07, 2008, 09:39:47 AM
I'm replacing my front and rear sprockets and chain. Took off the sprocket cover last night and found what must have been an inch of brown grime splattered everywhere (most likely 15 years of chain lube flung). Should I bother cleaning all this or leave it be?

A tough question   
Once you opened it, why would you even hesitate to clean it up? A little WD40 and ten minutes of your time is all it needs.

Definitely clean all that grime out of the sprocket cover.  Like astro said, use some WD-40 and a soft spatula or brush, something to clean it all out.

I've never used seafoam so someone else will have to chime in on that.

Quote from: dwoloz on June 07, 2008, 09:39:47 AM
I'm replacing my front and rear sprockets and chain. Took off the sprocket cover last night and found what must have been an inch of brown grime splattered everywhere (most likely 15 years of chain lube flung). Should I bother cleaning all this or leave it be?

Second, I'm planning to use some Seafoam. I know the most obvious application is putting some in the gas tank. However, on my previous cars I've always sucked some through a vacuum line, let it die it, wait a couple minutes then fire it back up. Is this at all recommended with a GS? If so, what vacuum line would I use and where is it?

yes, clean stuff up.

if you want, sure, use seafoam. i did it once, it -seemed- to run more smoothly for a little while. then i guess it went back to the way it was. best 'tune up' for less than $20 is draining the water from your tank / float bowls, putting new plugs in, and changing the oil - imho

Quote from: ohgood on June 07, 2008, 10:55:55 AM

Quote from: dwoloz on June 07, 2008, 09:39:47 AM
I'm replacing my front and rear sprockets and chain. Took off the sprocket cover last night and found what must have been an inch of brown grime splattered everywhere (most likely 15 years of chain lube flung). Should I bother cleaning all this or leave it be?

Second, I'm planning to use some Seafoam. I know the most obvious application is putting some in the gas tank. However, on my previous cars I've always sucked some through a vacuum line, let it die it, wait a couple minutes then fire it back up. Is this at all recommended with a GS? If so, what vacuum line would I use and where is it?

yes, clean stuff up.

if you want, sure, use seafoam. i did it once, it -seemed- to run more smoothly for a little while. then i guess it went back to the way it was. best 'tune up' for less than $20 is draining the water from your tank / float bowls, putting new plugs in, and changing the oil - imho

I agree with ohgood on this one.


I have never found a need to use sea foam in a GS.If it's running rough Sea Foam usually will not help.




I've found no easy way to run sea foam thru a GS without tanking the tank off.If you do it don't let it die.Just let it bog down.If it dies it's not burning the carbon off the pistons and valves.The only vacuum line on a GS is the one that runs from the carb to the frame mounted petcock.