Join Date: Aug 2017
Location: Fresno aka Shake & Bake California
Mentioned: 2 Post(s)
Valve re-shim Time
Valve re-shim is not one of my favorite maintenance tasks on the bike. At least you only have to deal with 8 valves on our little V-650 instead of 16 on the liter bikes. Part of the hassle is the translation from inches to mm. It's really not too difficult, but one must pay close attention to detail at all times. For me being more an inch guy, I do my work in inches then make the conversion to mm to get the correct size shims.
I initially checked the valve clearance at the published 14k miles. All were in spec but a couple were right at the tight limit. By the time you get to the 14k mile mark the valves have pretty much finished making any big moves so I buttoned her back up for another 5k miles. Now at 19k miles I figured I would do the adjusting.
Here is what she looked like upon inspection:
Cylinder 1 clearance Cylinder 2 clearance
Exhaust .011 .009 Exhaust .009 .010
Intake .007 .007 Intake .006 .007
Stock shims were as follows:
Exhaust .118 .118 Exhaust .121 .119
Intake .115 .116 Intake .117 .115
Exhaust .118 .116 Exhaust .119 .118
Intake .115 .116 Exhaust .115 .114
Valve clearance after replacement
Exhaust .011 .011 Exhaust .011 .011
Intake .007 .007 Exhaust .008 .008
Now before ya’ll say “Why didn’t you make your cylinder 1 intake clearance the same as cylinder 2? Cylinder one measurements were very much on the loose side so I left them alone. Cylinder 2 intakes measured, after the re-shim, at a tight .008 which puts cylinder 1 and 2 intakes within a half a thousandth of each other.
The job worked out pretty well as I was able to swap several shims and only needed to buy just 2 shims.
Now I am waiting for gaskets and o-rings to come in so I can finish the job.
Also if you decide to attempt doing this yourself be sure and buy or borrow a quality torque wrench. Don’t go with a Harbor Freight special. They are ok for things like lug nuts on your car, but on your very expensive aluminum head it’s not worth taking a chance.
A riding buddy has a real high quality torque wrench that I was able to borrow. Soooooooooo much nicer than the cheap arse Chinese junk.
Another critical tool is a good micrometer to measure the existing shims as well as the new ones you will need. Whatever you do don’t try the job with a digital caliper thinking that will be ok cuz it won’t.
Wrench well guys.
Cookin Wid Gas
2015 V-650 of course it's green...it's a Kazawalski.
Last edited by hawkerjet; 05-15-2018 at 03:33 PM.