Loud Knock, Engine Failure Quickly After
This is my first post, but here goes. I bought a 2002 VN750 about 5 weeks ago with 20k miles on it. It had a few scratches on the tank, but other than that it didn't appear to have been laid over or have been left outside. It seemed like a pretty good deal so I didn't have any issue with purchasing it for $1400.
I've been driving it every day to my university without issue. I mean, it is kind of hard to get into second gear sometimes as it seems to like neutral and it had a very quiet tick (which I later found out it is likely the ACCT or maybe just natural valve ticking). Other than that it's been reliable. However, yesterday was the first time I got to take it on a somewhat lengthy cruise, and after about an hour I started getting a very loud knocking sound in what appeared to be the top back side of the rear cylinder.
I immediately pulled over and killed it, checked the oil, and made sure there was still coolant or overheated. Everything appeared to be OK, but but when I started the bike up again the ticking was still there and it changed speed with RPM. I was only about 5 miles from home when it happened, so like an idiot I decided to chance it so I cruised back at about 20 mph in 4th gear to keep the RPM's as low as possible.
About a mile from home it made a single pop and the engine instantly died. I don't know if it was hard enough of a seizure to lock the back tire or not because I pulled in the clutch and coasted it to a side street. When on the side of the road I tried to see if it would turn over but all you could hear is the starter tick and something in the engine tick with the starter so I assume it was hung up on something.
My question is this: I know there are a million possibilities that could have caused this failure and it's impossible to know what without tearing into it, but if the ACCT failed, would it cause a hard seizure like that? I'm going to have to tear the engine apart regardless but I'm trying to figure out the likely candidates beforehand. I was also wondering if there are any write-ups on taking the engine out and rebuilding it like there is on the rear spline lube/replacement thread.