Good Evening from Clear Skies Syracuse.
So, I was able to remove and replace the spark plug from the front cylinder in my (new) 97 Suzuki Intruder 800. It had so much carbon that I could have used it in a barbecue pit (if it weren't snowing).
The problem arose when trying to remove the spark plug from the back cylinder (on the left side of the bike). I was able to remove the lead, although it was surprisingly very tight. The spark plug wouldn't budge.
A big problem is that the opening for the spark plug is underneath the fuel tank, so it was not possible to position the spark plug wrench that came with the bike (I don't know if it is the original). I tried a shorter spark plug wrench but it seemed to be too thick. I placed a rubber element in a regular socket that was thinner and shorter, but the plug just would not budge.
I put the lead back in the spark plug; much, much harder than the operation for the front cylinder maybe because the rubber around the spark plug seemed to be a little bit deformed. I started the bike to make sure that the connected back to the spark plug. The bike started and the engine ran fine and both exhaust pipes seemed to be venting fine, in neutral. The snow keeps coming down; so the bike didn't go anywhere.
I have four questions:
1. The Clymer manual says that if a plug does not move, to put some oil on top and wait 15-20 minutes and try to remove it again. Let's suppose it does not work because the plug is too tight or the space above it is too small. Would the oil affect the spark of the old spark plug?
2. Is the Suzuki 800 one of those bikes that requires the removal of the seat and tank to get the back cylinder's spark plug out? I don't know how difficult an operation that would be (although I assume the air filter will have to be removed soon given the condition of the oil that drained and replaced a few days ago.
3. Is there a very nice, short and thin, 18 mm spark plug wrench in the market that you have been able to use successfully in tight spaces? I may not have the best design for the task.
4. Will the engine suffer from having one clean spark plug and a spark plug that is at least two years old?
Thank you in advance!