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+--- Thread: Valves - to check or not to check (/showthread.php?tid=5707)
RE: Valves - to check or not to check - Birddogvet_imp - 10-31-2015
"spin the dang cam around where it ain't contacting the lobe."
True enough, that separates the Top Dead Center compression stroke from TDC exhaust or two rotations of the crankshaft per full cycle
"the cam lobe is contacting the valve or it isn't. "
Maximum full open is not just open even for intake readings. Do not rotate in reverse to find it.
RE: Valves - to check or not to check - Toddman_imp - 11-02-2015
(10-31-2015, 04:25 AM)Birddogvet_imp Wrote: "spin the dang cam around where it ain't contacting the lobe."
True enough, that separates the Top Dead Center compression stroke from TDC exhaust or two rotations of the crankshaft per full cycle
"the cam lobe is contacting the valve or it isn't. "
Maximum full open is not just open even for intake readings. Do not rotate in reverse to find it.
Have you ever checked the valves on a shim under bucket valve train? When the lobe is pointing away from the valve, take the minimal shim clearance feeler and if it slides in, you're good. I don't see any reason to go to TDC to check any of the valves. The cam should be true all the way around until it hits the lobe.
RE: Valves - to check or not to check - Birddogvet_imp - 11-02-2015
"Have you ever checked the valves on a shim under bucket valve train? "
I stand corrected.
RE: Valves - to check or not to check - Motogeezer1949_imp - 11-02-2015
Lee finished my valve check Saturday. Cylinders 1 & 2 were fine, 3 was loose on the exhaust, 4 was loose on both intake and exhaust. None of them out by very much.
He said the shims are the same as the Yamaha R6 uses.
RE: Valves - to check or not to check - Lord Popgun - 11-02-2015
Moto,
Did they give you the numbers? Would be nice to see some actual data.
RE: Valves - to check or not to check - the Ferret - 11-02-2015
Hmmm I thought the skinny on this type of valve arrangement was that they got tighter with wear, not looser?
RE: Valves - to check or not to check - Django - 11-02-2015
(11-02-2015, 11:32 AM)The ferret_imp Wrote: Hmmm I thought the skinny on this type of valve arrangement was that they got tighter with wear, not looser?
So it is.
RE: Valves - to check or not to check - 12cb96vfr_imp - 11-03-2015
(10-29-2015, 05:10 AM)AzBob_imp Wrote:(09-11-2015, 04:27 AM)12cb96vfr_imp Wrote: well.................I'm a moron!!! hahaha my buddy just called me and said all the valves are spot-on 100% perfect. I guess i was checking them wrong, b/c he said everything is good to go!
All in all I'm glad I checked, at least I know I'm all set now.
Question: when you checked them (incorrectly), did you follow the procedure in the Honda shop manual? Because that's how I'm planning to do it and now I'm kind of worried that I might mess it up.
Question: when you checked them (incorrectly), did you follow the procedure in the Honda shop manual? Because that's how I'm planning to do it and now I'm kind of worried that I might mess it up.
sorry man I've not been on here much - yes I did (at least i thought I did haha), BUT I've never done it before so I'm sure I was doing it wrong. It was my first time doing shim under bucket valves so I guess I was doing something bass ackwards
RE: Valves - to check or not to check - Motogeezer1949_imp - 11-04-2015
Pop, they is my buddy Lee, lifetime Honda mech. The next size up shims, whatever they are.
Ferret, without baselining, your postulation can't be known. Next time, we'll have something to compare to.
I just ride 'em, I leave the technical stuff to Lee. I have a detail guy too. 'Cause I'd rather be leanin' than cleanin'
RE: Valves - to check or not to check - Django - 11-04-2015
I had my CB to the 24,000 km service today. Valves were checked and all are in spec.
There were some minor differences to the measurements of the 12,000 km service, which I suppose to be more or less measurement errors.
However, those iridium spark plugs, which should be changed every 24,000 km are really expensive! One is 45 € (49 USD).