It is a tight space to do the valves, but really not that hard. It is much better to have the bike on a jack. The front cylinder is pretty easy, pull the tank, pull the airbox, if you still have the pair valve system in place that needs to come off, drain a little coolant, loosen the top radiator hose, unbolt the top of the radiator, loosen the bottom bolts, pull the top hose loose and let the radiator hang forward a little to help access the front exhaust valve. If yopu need to you can unbolt the radiator completely, and leave the bottom hose connected. The intakes are pretty easy. For the rear exhaust valve, I pull the coolant hose that runs from the water pump to the thermostat, at the thermostat, and plug it. I then pull it down out of the way. I also pull the fuel line from the injector rail and move it out of the way. The rear exhaust valve is the toughest one to get to, so I move as much of the hoses as I can to make it easier. I use standard length feeler gauges in a set instead of individual gauges, and bend the ends to get between the valve and rocker. I like to tighten the pivot of the gauge set so they will stay at whatever position I want. The reason I like to use a feeler gauge in a set instead of individual gauges is I because I like having a big handle to hang on to as I am getting them into position, and I do not have to worry about dropping it in the rocker cover. I bought a set of valve adjustment wrenches on Amazon that basically are a 10mm socket with a handle and a knob with a 4 mm square socket inside the 10 mm. They work well, but are too tall for the rear exhaust valve. So I got a 4mm open wrench for the rear exhaust valve, though I have not tried it yet. It may work better all the way around, but I like having the knobs on the valve adjustment wrench because they are marked and it easy to see how much you have adjusted, and you can hold it while tightening the wrench. One big thing to remember is to be very careful not to let anything fall in the rocker cover. There is no way to get the rear one off without pulling the engine.
Thanks! I basically did all the prep work you said, jack/stand included, difficulty was less the issue than dexterity. I was pretty much able to get the measurements (seemed right) and was glad not to have to try getting wrenches in there. Knowing I’d probably drop one, I was prepared to use string on them just in case, as has been widely recommended.
As I’ve said, it runs great, but the “sewing machine” sound kept bothering me. The more info I get, the more I think I’m good.
Amazon.com: BikeMaster Valve Clearance Adjustable Wrenches - - : Tools & Home Improvement
Acu-Min 51-1834 Open End Wrench, 4.0 millimeter, Steel Handle, Black Oxide Finish, 3 inches Overall Length: Amazon.com: Tools & Home Improvement