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+--- Forum: Mechanical & Technical (https://cb1100forum.net/forum/forumdisplay.php?fid=7)
+--- Thread: Valve Clearances tightening (/showthread.php?tid=4787)
RE: Valve Clearances tightening - max - 07-11-2020
Joe since you're here i'm interested which shim sizes you have stocked up on and how many?
I start at 1.90 and step with 0.025 up to 2.175 with 5 of each, they also fit under my cb919 and the cb1000r in mostly the same thickness sizes and live under an oil film, last thing i want is a rusty shim to throw the measurement off, should i get some more?
RE: Valve Clearances tightening - pekingduck - 07-11-2020
(07-11-2020, 12:39 PM)LakeWylieJoe_imp Wrote: You are correct. They don't wear, residing as they do below the bucket and above the stem and spring assembly. They merely get squeezed once every other crank rotation, and they are made of very hard metal.
Enclosed is the MS Excel shim calculator I use, if anyone wants to try it. You enter the measured clearances and the installed shim thickness and it calculates the new shims needed. It's laid out like the valves are in the head so you can keep all the numbers organized.
You can always copy and paste the calculations lower on the page each time you do a service so you have a record of what each valve does over time.
Let's try that again. The spreadsheet previously sent wasn't ready for prime time. This one is.
Not on the CB1100 with the small under-bucket shims. I meant the 25mm diameter over-the-bucket shims as on CBX.
RE: Valve Clearances tightening - LakeWylieJoe_imp - 07-12-2020
I made a small box to hold my CB1100 specialty items (cam chain tension release tool, shims, etc.).
See the attached photos, including one of the shims I have on hand. It seems like nearly every shim that came with the bike was the same size, which speaks volumes about how precise the machining must be at the factory.
RE: Valve Clearances tightening - the Ferret - 07-12-2020
Neat box. Man, the edges of those shims look rough, do they in person?
RE: Valve Clearances tightening - Houtman_imp - 07-12-2020
Some one (you ?) is a great wood worker , that is a beautiful box !
RE: Valve Clearances tightening - LakeWylieJoe_imp - 07-12-2020
Now that you say that, yeah, the edges aren't nearly as smooth as the top/bottom surfaces. Many of those shims are right out of the Honda packaging (never used).
RE: Valve Clearances tightening - peterbaron - 07-12-2020
LWJ, nice wooden tool box =
RE: Valve Clearances tightening - Cormanus - 07-12-2020
^^lovely.
RE: Valve Clearances tightening - max - 07-13-2020
Talk about very precise, that is artisan work mate, a box within a box...
Even the fabric is cut to a precision fit, well done Joe and yes that answers my question precisely, right sizes and amounts as i worked out from various posts.
Handy to know because ideally you want the shims to be right at hand during the job instead of having the bike sit for 3 weeks with the top off and the cams out.
And thanks to the forum we now know what to order to be ready and motivated by your pictures i made one of my little 7.48 mm. shims all lined up for a group photo and valve check sheet;
Also made a note of the amount of turns the cam chain adjuster is inserted to keep an eye on chain wear over time.
Thanks again Joe
RE: Valve Clearances tightening - peterbaron - 07-13-2020
WOW, MAX this is even better than any dealership work. Can I make an appointment?
