Update
I figured I owe you guys an update.
The problem ended up being one exhaust header pipe (#3) which had rotted out right where the end goes into the head. It's double walled, so the inner pipe was ok but the outer pipe was rattling around. All I had to do was kick it and I could see it moving in and out. The rattling was due to vibration. WHEW!!! I was sweating the rebuild for a while there but all is still good.
I need to replace the headers soon. I could also see a pinhole leak in the inner pipe, which explains an occasional burp I could hear from the intake.
I took it off, welded it back together, cleaned it up with a right angle grinder, and put it back on. Now the occasional exhaust burp is gone. That should get me through this summer. I will deal with a new exhaust setup this upcoming winter.
Oh yeah, I replaced the clutch basket as well. It was kind of helpful to have this problem because while going behind the clutch basket, I discovered pretty worn springs. The clutch basket I purchased on Ebay was a lucky find as all plates and springs were in much better condition than my original. The PO must have replaced them before having the bike parted out.
I figured I owe you guys an update.
The problem ended up being one exhaust header pipe (#3) which had rotted out right where the end goes into the head. It's double walled, so the inner pipe was ok but the outer pipe was rattling around. All I had to do was kick it and I could see it moving in and out. The rattling was due to vibration. WHEW!!! I was sweating the rebuild for a while there but all is still good.
I need to replace the headers soon. I could also see a pinhole leak in the inner pipe, which explains an occasional burp I could hear from the intake.
I took it off, welded it back together, cleaned it up with a right angle grinder, and put it back on. Now the occasional exhaust burp is gone. That should get me through this summer. I will deal with a new exhaust setup this upcoming winter.
Oh yeah, I replaced the clutch basket as well. It was kind of helpful to have this problem because while going behind the clutch basket, I discovered pretty worn springs. The clutch basket I purchased on Ebay was a lucky find as all plates and springs were in much better condition than my original. The PO must have replaced them before having the bike parted out.
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