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Working on a completely stock '79 GS850. The bike runs well. I put new spark plugs in a little over two weeks ago and today I thought I'd pull them out to see what they look like to get a general idea of how things are burning. All four look like brand spanking new, bright white insulator, some grayish on the side electrode. Seems like there ought to be at least a little tan or brown somewhere. This says to me that it's running too lean no?
Carbs recently dipped and rebuilt with new o-rings, installed and vacuum synched. Has the stock #15 pilot jet and 102.5 main jet. Fuel screws about 3/4 turn and air screws 1 1/2. I went through the airbox and sealed it, new airbox to carb boots and new carb to engine boots and o-rings. New suzuki air filter. I'm worried that I might damage it running it too lean. What could be the problem here that's affecting all cylinders? Would going to 1 or 1 1/4 or more on the pilot fuel screws be advisable to try and richen it up a bit??
Carbs recently dipped and rebuilt with new o-rings, installed and vacuum synched. Has the stock #15 pilot jet and 102.5 main jet. Fuel screws about 3/4 turn and air screws 1 1/2. I went through the airbox and sealed it, new airbox to carb boots and new carb to engine boots and o-rings. New suzuki air filter. I'm worried that I might damage it running it too lean. What could be the problem here that's affecting all cylinders? Would going to 1 or 1 1/4 or more on the pilot fuel screws be advisable to try and richen it up a bit??
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