| Author | Message | ||
     Duphuckincati |
Some have had occasion to check and adjust valve clearance before the 12k check. Anyone care to comment? And how hard do you run your Buell? | ||
| 1_mike |
I don't beat mine, but drive hard as the occasion arises. I dug into my CR at "about" 4000 miles and ALL 8 were tighter than the book allows. I for one...as mentioned a few times on this board...am glad I did mine early. Mike | ||
| 1125rcya |
1_mike Did you loosen and then adjust to speck? If the valves are to tight what will that cause? | ||
| D_adams |
Tight valves will stay open too long, end result, burnt valves if left that way too long. | ||
| Bobbuell1961 |
A loose valve is a happy valve, Racing is a different story  | ||
| 1_mike |
1125rcya - You can't "loosen then readjust to spec." You check the current rocker to shim gap. You verify per the manual what it's supposed to be. You then just do a little 4th grade math, and figure out what shim you need from the original check...then buy that shim and install, verify, reassemble. Many things can cause the tight clearances. I won't speculate on the cause. In my case, Dean is right. The gap was so tight, there was witness marks on almost the full circumference of one cam lobe...NOT good...! While I have leakdown check equipment for the cars, I didn't check to verify all was well on that cylinder. Seats are only good for a rough given amount of miles anyway before they start to seap/leak. With the way the lobe looked, I wasn't too concerned. As far as a "loose valve is a happy valve" funny...but not quite correct. That, VERY much depends on the cam lobe grind. Mike | ||
| Bueller4ever |
Mike, what prompted you to check your valves so soon? | ||
| 1_mike |
Way back, I bough my second new bike, an 87, FZR 1000. Mostly curious about the new Yamaha engine, after about 5000 miles (12,000 recommended) I decided to dig in and look... I figured while I'm here...run the valves. Well, about half of them needed new shims. So I've checked all of my bikes since then...early. I have about two weeks off during Christmas Holiday...it was then I decided to go at it. Add to that, someone had his R apart some time ago here on the Badweb, and mentioned his tight valves, so I figured it was about time I checked mine. Just like steering head bearings.. My CR is the "first" bike I've owned, new or used that DIDN'T need the head bearings adjusted..! Mike |
