So, today I committed to doing a valve adjustment on my 2002 bike (750 ACE of course). I am by no means a mechanic, but I am pretty good at following instructions, and the widely distributed maintenance guide has a pretty good write up on this. Anyhow, there is a few particulars/incidents about which I want to get the opinions of those much more mechanically inclined than myself.
First challenge came when I was removing the head covers. The guide says do this slow and (if you have to disconnect the coolant lines...which I had to) make sure you don't get any coolant into the heads, or the oil. Well, I did it slow, but after I had removed the rear cylinder head cover (because I was hoping to not have to remove the coolant lines). Unfortunately, I was doing this in a garage with the door open (for natural light). The rear of the house faces the prevailing winds. Someone opened the inside garage door and immediately a fast wind blew through and Bernoulli effect sucked coolant out of the open male end of the coolant line. A couple drops got into the head. Maybe 1/4-1/2 ml of fluid. I don't think any mixed with oil and I shoved a rag on the end of a screwdriver into the crevices of the head to mop up what I could. The coolant had a tendency to pool up into a drop and was fairly obvious anywhere it was. Of course some is still present, on a microscopic level, but nothing obvious. Further, by then I was frustrated and when I disassembled the front cylinder coolant line, I was a little "rammy" and I may have gotten a couple drops into the cylinder itself (open to the air once the carburetor is removed). That said, I chased it with a flashlight and a lint-free cloth and didn't see any hints of wetness on the walls of the intake channel, which suggests it either quickly drained to the bottom of the cylinder (seems a little unlikely) or simply didn't get in there at all.
Finally, when I got to the valve adjustments, it took a while to realize that dragging the feelers meant "all the way under the tappet face of adjustment screw" not just the lateral aspect of this face, which seems always obtainable with any feeler. In other words, I think my valves were pretty tight, as I only realized this once I could get the thinnest feeler under the exhaust valve of the rear cylinder while trying to develop a technique for the front cylinders (hey I was getting disappointed while trying to understand what to do, considering all feelers fit under the lateral part of the screw, but none of the feelers fit under the whole screw). So, anyway....it is around this time that I realized that my "metric motorcycle" specific feeler kit didn't have enough feelers to do a valve adjustment. So....all I could do was attempt to adjust the exhaust valves to 0.2mm, and intake valves to 0.15mm. Hey, at least its at the middle of the expected ranges. Except, this doesn't allow you to test a feeler at the top end of the range to ensure it doesn't fit, or to use a feeler at the bottom end to ensure that it was loose. So, I decided to adjust the valves so that it took some effort to drag it through (not much effort, but it likely wouldn't fall out quickly simply by gravity if it were turned on its side), and it didn't really take any effort to initially get the feeler under the screw. Then while locking the valve screw and nut in place, I had to use my hands (no 4mm wrench but my fingers seemed much more naturally adept at this than a wrench would be). Further, I didn't have a torque wrench (I left it at the cabin on the weekend). But, whoever did the last valve adjustment on this bike (I have only had the bike for about 5000 km, now its at 38,000), apparently was hercules. When I tightened the lock nut I simply tightened to the point that the bike rocked slightly. This caused the valves to tighten slightly, so I would tighten, check the feeler, and redo if I didn't like the feeler travel (once again, easy insertion under the screw, some minor effort beyond gravity to pull through, at 0.15mm or 0.20mm depending on valve identity).
So, what do you guys think:
a) considering the coolant: Did I clean it well enough or should I do something like an immediate oil change, or run it for a bit then oil change (with oil filter), or am I royally screwed and better take it to an expensive mechanic?
b) If the valves were that tight before I started, am I about to find myself in a would of hurt regarding those valves now?
c) do you think my valve adjustment technique was adequate to keep my baby healthy? Or did I adjust them too tight myself? Do you think my torque approximation was OK?
d) My next consideration to keep my baby great is to consider a carburetor cleaning and synchronization. I think I might farm that out (considering someone told me just this evening of a local retired mechanic who still likes to work on Hondas....how can I resist!)
Any feedback will be warmly welcomed and greatly appreciated.
Edited by cyanide, 19 June 2017 - 10:44 PM.