This will be my second chain adjustment on the bike since ownership of it. The first adjustment I did after the dealer put a new chain and sprocket on it ~920 miles ago. The rear axle wasn't equal on both sides of the swingarm so while I was fixing that I gave the chain a bit more slack because the previous chain from the original owner ran too tight. I didn't want to repeat history. Bike has 8,xxx miles BTW.
Last adjustment I did I thought
I set the slack to 1 1/4", because I measured the highest part of the slack at the top
of the side plate, and then I measured the lowest part of the slack at the bottom
of the side plate. I remember that the chain didn't touch the swingarm, the entire up and down slack was between 15mm and 50mm as shown on the tape measure.
The Honda manual says measure slack from the up and down movement of the roller pins. A nice video from Canyon Dancer showed them measuring from the top of the side plate at both the lowest and highest points in the slack. I wonder now if my original was more like 21mm instead of the 35mm!
- Do you measure the slack from the same
fixed point on a chain, i.e. the center of the roller pin or the top of the side plate?
- Based on my photos, I can't even move the chain high enough before hitting the swingarm to tell what the slack is. In the first photo below, measuring from the center of the roller pin (~48-49mm) at the lowest (and tightest part of the chain), when I lift the chain up I have just barely any resistance up until the chain meets the swingarm. In the second photo, that's 15mm, so my total slack up to hitting the swingarm is ~33mm.
Am I doing this wrong on this motorcycle? The chain is so close to the swingarm already that it seems to be difficult to know where it would have stopped if the swing arm wasn't in the way. According to my measurement, I'm technically still within spec. Without really having much resistance though, I'm not sure if the swingarm wasn't in the way what my slack would truly be.
I suppose if the chain slack increased so the roller pin was at 55 mm on the tape measure then
my slack up to the swing arm would be >35mm and it'd be time to adjust.
Am I missing something here or am I really doing this right? Is my chain too loose as shown?
Lastly, I shot a pic of the inside of the rear sprocket. The upper edges of the teeth seem a bit more scratched up than the outside edges, but I'm not sure if this was caused by that slight misalignment of the rear axle until I fixed it or if that's a symptom of chain slack. The chain and rollers have zero wear to them.
Sorry for the long post. I've just been really hung up on trying to check chain slack on this thing, and I really need some help from you guys.