2006 ZX-10R with about 31,000km
I've been playing around with my CCT the last few weeks. I figure I should write all the info about everything I've done and experienced in case someone can provide guidance.
Back a few months ago when I did my valves and fixed my valve spring retainers, I put in a manual CCT in, but I've never been totally comfortable that I got the tension set correctly. I should have checked the length on the auto CCT, but didn't think it was necessary at the time. At first I did it finger tight while rotating the engine, then backed it out 1/4 turn. The chain seemed to make a lot of noise and I could feel some slack when I revved the engine and/or let out the clutch in neutral, so I tightened it up a bit more until the slack was gone and it got quieter. After that, I could hear a loud ticking noise coming from the left side of the engine. Seemed to be almost gone around 60°C, and get louder up to 90°C.
I thought maybe I did something wrong with the valves, so I ripped the entire thing apart again and checked. Everything was fine. Keepers are all seated and spaced nicely, and valve clearance is on the loose side, but still in spec everywhere. And the bike had been sitting for a few days, so was definitely at the right temp when I checked.
I got paranoid I had it too tight, and it was causing the noise, so I decided to go back to the auto CCT and see what happened. When I was doing it I noticed something strange. Playing with it out of the bike, the spring inside doesn't look like it applies enough pressure to extend the tensioner all the way. When I put the spring in with the little metal rod and tighten the big bolt on the back, it pushes the plunger out maybe 2/3 of the total distance it will travel. The plunger doesn't seem stuck (I oiled all around it and it slides as smooth as it can with the little locker pressing against it). The spring doesn't look visibly damaged or distorted. This seemed a bit strange to me. I tried looking up a diagram, but it only shows the tensioner as one full assembly. Doesn't seem shared with any other bikes, although that could be the entire assembly.
Haven't been able to put more than about 50km since the auto CCT went back in. I did the 5th gear roll back to adjust the tension, and have had it up to full temperature for a while. There is a lot more noise on the right/chain side of the engine than there used to be and the bike in general feels more "rattely" than before, but I don't feel the slack in the throttle like I did with the manual one. Not sure if the ticking has died down, or is just more hidden in the other noise.
Bike runs great, full power and on all cylinders.
Not loosing any coolant.
Not loosing any oil, at least not enough to notice. Haven't topped it up in the last 3000km and it's well within the sigh glass.
Anyone have thoughts or knowledge about the auto tensioner?
Any idea what the standing length of that spring should be?
Is a ticking noise from the LEFT side of the engine at all normal?
I'll try and get a video later to show the noise I'm talking about, maybe someone can let me know if it's normal or not.