So...I'm doing my first valve clearance check.....
Checked all the clearances. They're all over the place with less than .05mm on both horizontal closers. So I moved the opening rocker out of the way, removed the opening shim, secured the valve (like LT says), got the half rings removed. The door bell rang, startled me - I jumped, knocked everything and lost the inlet valve down the hole and into the cylinder.
No big deal, as the radiator is off, and the oil cooler, guess the front head will come off too. I'm changing the belts as well - by the way, the cam tensioner bearings have lost their end seals, so need replaced too - ..
Finally, my question --- I obviously need a cylinder head nut tool. Any recommendations? I see that Motoreva make one. Perhaps a thin regular ring/open wrench. The right side nuts seem to have limited access.
Or perhaps somebody knows how to turn the bike upside down and shake the valve into place.....
simple head nut wrench. us a 14 or 15 mm combo wrench (size depends on the size of your head nuts). put the box end in the vice and heat up the shank with a torch about 1/4 - 1/2" out from the box end and bend to aprox 45 deg angle. Heat shank again but this time aprox 3/4 from the first bend. Shank should end up a 90 deg from box end. Now place the open end of the wrench in the vice and heat shank as close to the box end as possible and bend 90 deg. You should end up with a wrench that's shaped kind of like a U. Grind a little bit off the face of the box end to make it thinner so it fits into the nut area of the head easily. Now weld a old socket that fits your torque wrench onto the top of the open end of the wrench. Presto, you now have a dealer service tool knock off.
As Tonered said, "pull the belts when changing shims". You can then keep the piston at TDC and the valves will stop before falling into the cylinder. Very important!
I originally tried this but couldn't turn the cam all the way round. Thought a valve was hitting the piston.
But it turns out that the closers are TIGHT, so I was feeling friction on the closing lobe. Yikes no gap....not good
Anyway all is not lost. I thought for a couple of days, made a simple tool from things I found in the kitchen drawer and 8 minutess later the valve had been pucked up and fed back up the guide (horizontal cylinder inlet). Re-installed the collets. All is good.