Valve lash on aftermarket cams

[blowerbike]

i would have liked to seen the boots port matched or at least funneled to the head.
thats a pretty big ledge where the "big" boots mount to the head.
is it to late?
ive stuffed rags in the ports before and funneled these with a sand roll with good results.

[Nessism]

One other comment Bruce, you should check those cam lobes for clearance at the bucket bore. Lever the cams though the thrust clearance to make sure they can't hit the head. I'm not sure if this is a real concern or not but just wanted to remind you to check after checking all extreme positions of the cams.

[gs road racer]

Has anyone bothered to measure the height of the lip around the bucket in which the shim resides?

Just a couple things to ponder.

.

FYI it's 2mm.......... the problem with large lobes that require cutouts for clearance is I'll bet (my estimation) that the cam at some point would ride up the side of the shim.I'm looking at wear patterns on a set of yosh cams (.380 lift) and there is a distinct pattern that can only come from this. My thinking is this could conceivably pick the shim right outta there at high rpm.The drag racing crowd might shed some light on this??? Blowerbike?

[blowerbike]

FYI it's 2mm.......... the problem with large lobes that require cutouts for clearance is I'll bet (my estimation) that the cam at some point would ride up the side of the shim.I'm looking at wear patterns on a set of yosh cams (.380 lift) and there is a distinct pattern that can only come from this. My thinking is this could conceivably pick the shim right outta there at high rpm.The drag racing crowd might shed some light on this??? Blowerbike?

billyB should be able to answer that.
he seems to know the performance side of the GS 8 valves inside and out.

[ryder60]

I could use a little clarification. Stock calls for .03 inch to .08 inch. A couple of you guys are setting at .004 thru .006. To me .03 is 3 one hundredths 100 of an inch and .006 is 6 one thousands of an inch. It strikes me there is a big difference here. Am I correct, I am not sure what gap to set now.

[renobruce]

I could use a little clarification. Stock calls for .03 inch to .08 inch. A couple of you guys are setting at .004 thru .006. To me .03 is 3 one hundredths 100 of an inch and .006 is 6 one thousands of an inch. It strikes me there is a big difference here. Am I correct, I am not sure what gap to set now.

.03 to .08 millimeters, not inches. .004 to .006 inches converts to approx. .10 - .15 millimeters.

[BadBillyB]

Andrews cam spec sheet says you can run as much as .424" lift with the factory tappet cups, with shim on top. I dont think this is wise. Rule of thumb, in my opinion, is anything over .400" lift requires shim under buckets. This is the same point at which you may have to cut relief notches in the tappet bores. So basically, if the cam lobe does not contact the top of the bore when turned, the stock tappet cups will be fine. This is assuming you use good valve springs and dont over-rev the motor. Of course we are talking about cams that were ground using the stock "base circle".....Higher lift race cams, like Web-Cams 480/460 or 500/470 combos are ground at a reduced base circle to eliminate clearance problems.......Billy

[Homie]

resurrecting another old thread...

One of my 1100E's has Cam Motion G3 cams in it. The "G3" is a moderate cam with .345" lift and is ground with a smaller base circle than the stock cams. With the smaller base circle the rocker arms are closer to the centerline of the cams and further away from the valve stems. With these particular cams, my threaded rocker arm adjusters are almost fully extended to contact the valve stems at the desired clearance. By fully extended I mean there are little to no threads extending above the locknuts. Anyone ever encounter something like this? Is it a reason for concern? Is there a remedy?

[rapidray]

One of my 1100E's has Cam Motion G3 cams in it. The "G3" is a moderate cam with .345" lift and is ground with a smaller base circle than the stock cams. With the smaller base circle the rocker arms are closer to the centerline of the cams and further away from the valve stems. With these particular cams, my threaded rocker arm adjusters are almost fully extended to contact the valve stems at the desired clearance. By fully extended I mean there are little to no threads extending above the locknuts. Anyone ever encounter something like this? Is it a reason for concern? Is there a remedy?

ADJUSTER SCREWS
Some very high lift cams have reduced base circles to keep the nose of the cam on the rocker pad. This can cause a problem with the valve adjuster screws being too short to get proper valve lash. Theser high performance screws are longer than Suzuki screws and solve the problem.
ERA1100S Complete set $62.95

From The GS Zone at APE! Ray.

[Homie]

Looks like just what I need. Thanks Ray!

ADJUSTER SCREWS
Some very high lift cams have reduced base circles to keep the nose of the cam on the rocker pad. This can cause a problem with the valve adjuster screws being too short to get proper valve lash. Theser high performance screws are longer than Suzuki screws and solve the problem.
ERA1100S Complete set $62.95

From The GS Zone at APE! Ray.