The 80 special that i have has the famous xs crack down near where the two pipes come together near the foot peg, the crack is on the left exhaust and goes all the way around the pipe thus separating the pipe it makes it a little loud and carbon shows up on the pipe immediatley after it, i am going to get it welded up, but for the moment i suspect that the imbalance between the left and right vacuum is responsible for the way it is currently running , i mean after all the right side pipe is fine and runs great and has normal vacuum , but the left side where my timing vacuum hose is hooked up has weaker vacumm and more questionable vaccum due to exhaust not making it to the end of the exhaust muffler . So half my engine is running different than the other half! Does anyone have input regarding this situation and suggestions and or experiences. Thanks
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