Web -Cam hard weld camshaft problems

Hello, I'm having wear problems with a pair cams that have been modified by Web-Cam racing cams. They build-up the lobes with a special wear resistant welding rod. Then they can re-grind the cam for different lifts and durations.My problem is the lobes are pitting, and the lifter buckets show wear that looks like spalling. If you;or anyone you, know has any problems with this process I would love to hear about it. I should have pics in a couple days. Hard to shoot good close-up. Thanks,Jake

 

It is tough to measure. but could you be experiencing coil bind?

 

I had Web cams in my YZ250F that were raced for 4 seasons. No discernable wear whatsoever

 

Web cam's in my R1 show only normal wear after 7 years of use. Maybe contact Webs cams with a picture???

 

coil bind? I've never had such problems with web cams in the years i have used them. Poor lube, too much spring or coil bind could be issues. Banzai asked the right question. Set up a dial gauge and see how much clearance you have at full lobe compression.

 

is anybody running a cam for a 08 r6 and up, what profile are you running or part number

 

I checked this out to tell the poster about you but it is you.

 

Web-Cams pitting

A little more info about the motor. The cams, Web-Cam grind # 163 are in a Yamaha FJ1200 motor with lots of mods. Bored to 1349cc (using a XJR1250 euro model) cylinder block. The head is from the same model and has 1mm over valves, 10.7 to 1 CR,39mm FCR Keihens, Dyna 2000 ignition,Remus 4-2-1 pipe,Falicon Knife rods and clutch basket. Fast by Gast undercut the tranny.I bolted it together & boy what a rocket.But every time I check the cams they have pits in the closing ramps. The cams chew-up the shims too. The springs are set to specs. It's not coil bind. Hank Scott and I think the profile is flawed.

 

Nice. I loved my old FJ1200. It had grunt.

 

Sounds like somebody spent a bunch of money, yet didnt buy the shim under bucket conversion. .375" lift is max with that bucket diameter with stock shims.

 

The FJ 1200 cams are safe to .400 lift with the OEM shim on top buckets. By safe I mean that with any more lift, the nose of the cam gets too close to the edge of the shim.When that happens the lobe can spit the shim out. That is not the problem here. But I have run the cams with both style of buckets and I found pitting on the closing ramps with both. The cams were real rough on a set of Kibblewhite shim under buckets. After a thousand miles the tappet wear surface has scratches that resemble what I've seen on bedrock from glacial striation.

 

Almost sounds like you are lofting the valves, as any wear or spring issues would more likely show up at peak lift. If peak lift area is good, then you may need more spring for the RPM's you are running. Just my guess...

Ron

 

I've got float.Problem seems to be with the cam as Web-Cam has replaced the#163 cam with the #540. Same lift & duration as the #163.