After a few issues, I got the cam shaft bushings in. I went to test the cams and the primary exhaust bushing is too tight. That is how I discovered that I need to line ream the bushings. Neither the Hughie Hancox video, nor the Wes White video, nor any of the books mentioned this. It's another $80 tool.
This is what I need to do, skip to 16:00:
Bummer. I've talked to more than one Greybeard type that says don't change those cam bushings unless they are definitely beyond spec.
I changed them in my T100 because hell, it's a new engine, right? I took them to the local Triumph extortion dude because I wasn't too sure I'd ever need the proprietary reamer again and I knew he had one. It cost me $45 if I remember correctly and I wound up with EXACTLY the same in spec clearances. I wasn't too stoked. I suspect a good machinist could do a better job but it would probably cost a good bit more too.
I'm hopefully going to get to borrow one. Here's another story:
"I had a BSA in here... the guy who rebuilt the motor took lapping compound and lapped the cam into the bushing instead of reaming the bushing with a tool, then when he fired up the bike that shit went through the engine and ruined all the bushings and bearings."
Bummer. I've talked to more than one Greybeard type that says don't change those cam bushings unless they are definitely beyond spec.
ReplyDeleteI changed them in my T100 because hell, it's a new engine, right? I took them to the local Triumph extortion dude because I wasn't too sure I'd ever need the proprietary reamer again and I knew he had one. It cost me $45 if I remember correctly and I wound up with EXACTLY the same in spec clearances. I wasn't too stoked. I suspect a good machinist could do a better job but it would probably cost a good bit more too.
I'm hopefully going to get to borrow one. Here's another story:
ReplyDelete"I had a BSA in here... the guy who rebuilt the motor took lapping compound and lapped the cam into the bushing instead of reaming the bushing with a tool, then when he fired up the bike that shit went through the engine and ruined all the bushings and bearings."