Spent most of the morning cleaning rockers and examining. Had 38 of them total. At least 1/3 had tappet adjuters I would not use. Here's some samples:
Pit:
worn concave:
neither of those were in my engine, came from parts bikes. Lesson: If you have above 20K on CB750, pull the adjusters and check for wear. Won't cause catastrophic failure, but will mess up your valve adjustment readings and put steel in your oil. I've bot 8 new ones for this project. Many of my spares are serviceable, but what the heck. I easily had 16 very good rockers, 8 for this project, 8 for the next, which i will have magnafluxed and cryo'd, for slipperiness.
In this we inspected my stock cam inventory. One I bot off eBay a year ago, came with a K5 head and rocker stands, so I figured it was at least a R8 cam or higher. Turns out to be an R2! which was only avaiable in K0 bikes, maybe some K1. They are obviously, to the eye, hotter cams than later ones.
Can you see the difference? I had an R1 in my avatar bike:
I'm thinking dang, could my WebCam41 be hotter than that?
Got my order from Yamiya. There service is amazing. One week from Japan, Monday to Monday. (actually less as it came Saturday, but i wasn't here to sign.)
FYI: I bot their countershaft sprocket, turns out to be an AFAM, so I paid too much. But they do have a lot of little do-dads you can't get elsewhere.
FYI, the drive ratio of a 17/48 with an 18" tire is a virtual lock with a 18/48 and 17" tire. That's why I needed the 18t sprocket.
Got my cam and HD cam chain from APE, cam sprocket backordered.
WebCam 41 grind. So now i can compare all 3. Can you see the difference?
The 41 is far left, a little hotter still than the center R2, and the puny R8 far right.
So I've got most of what I wanted to cryo in the bottom end. Got to get the primary chains and misc to NDTesters.
PS: I know the 41 is a puny cam too. I'm just speaking relatively.
