Since I am waiting on parts thought I would shim the valves. Yikes!
After some reading and talking with the guru Mike Nixon valve lash should be .005 all across. The valves are within spec now but he told me the CBX loves the .005 clearance to get the most bang. For every .001 out of adjustment is 15 psi in the cylinder. I'm running .003 to .005 now.
I have five (5) at .005. Nineteen (19) to adjust. Never done this before and have to mic everyone and record. I'm looking for 25 mm shims. (posted in the wanted section)
Well, wish me luck!
tt
ToyTuff,
There is a spreadsheet available for calculating the shim size you need for your desired clearance. I got one off the cbxworld site in 2010, but it actually didn't work right for me and when I bought the shims that it calculated, they were WAAAY off. Maybe I didn't understand it completely.
Anyway, I built my own spreadsheet (but using OpenOffice rather than Excel) and will try to attach it in case you would like to use it. Others with shims might find it useful as well.
Edit - This forum disallows uploading .ods files, so I used OpenOffice to save the spreadsheet in .xls format. Hopefully it is compatible with MS Office excelAlso, Yamaha shops may have the shims you need since the Venture and others used the same diameter shims.
Good to know that Mike Nixon (I have his carb book) recommends .005. I would not have guessed that, and had targeted a tighter clearance on mine as can be seen in the row entitled "Target Valve Clearance (thousandths of Inch)". You can set that to whatever clearance you are shooting for.I am due to check my CBX valve adjustment too... sigh.