kneegrinder
New Member
I just rebuilt the top end a week ago. Bike was running perfectly, but leaking oil behind the cam boxes. Probably 2 miles on the engine since I assembled it, just test runs. I took the top end apart again yesterday to use thicker gaskets and eliminate the cam box leak. I had to unbolt the cam gear to do all this (they certainly didn't engineer this thing for maintenance ease).
After reassembling everything today, the engine won't rev high. Idles perfectly, but off the line it bogs, and won't give me full power on a test run. Had to hold throttle wide open in every gear just to get back home.
I have it tuned to spec. Cam gear "L" level @ LT, advance locating pin pointing at 12 o'clock, valves good, head torqued, static timed. The cam boxes are fresh NOS. Advance unit fresh NOS. Points plate and points fresh NOS. Rick's Stator. You get the idea. The bike ran like it was new before I went in to fix the leak.
I pulled off the points cover tonight to investigate, and noticed metal shavings in there. I can't get the advance unit off. I have soaked it in PB, not going to heat it (oil seal behind). I understand it should pretty much slip right off, it did a week ago on the first rebuild.
What happened with this latest assembly? I put the cam box gasket on as shown in the parts fiche (I understand they are directional). I didn't do anything different that I can pinpoint. I'm racking my brain.
I have a feeling that there is some unwanted friction somewhere in the system due to the shavings and reluctance to reach upper RPMs and full advance.
Any ideas?
After reassembling everything today, the engine won't rev high. Idles perfectly, but off the line it bogs, and won't give me full power on a test run. Had to hold throttle wide open in every gear just to get back home.
I have it tuned to spec. Cam gear "L" level @ LT, advance locating pin pointing at 12 o'clock, valves good, head torqued, static timed. The cam boxes are fresh NOS. Advance unit fresh NOS. Points plate and points fresh NOS. Rick's Stator. You get the idea. The bike ran like it was new before I went in to fix the leak.
I pulled off the points cover tonight to investigate, and noticed metal shavings in there. I can't get the advance unit off. I have soaked it in PB, not going to heat it (oil seal behind). I understand it should pretty much slip right off, it did a week ago on the first rebuild.
What happened with this latest assembly? I put the cam box gasket on as shown in the parts fiche (I understand they are directional). I didn't do anything different that I can pinpoint. I'm racking my brain.
I have a feeling that there is some unwanted friction somewhere in the system due to the shavings and reluctance to reach upper RPMs and full advance.
Any ideas?