These seem to be impossible to track down. I have a clunk in the front end when braking, very similar to loose headstem bearings, but I don't think it is them as I can't feel any notch or slop in them at all. So I suspect the fork bushings are worn and thats whats clunking The parts diagram only shows 1 bushing that I can see, and the P/N is 1HX-23125-00 I've heard there's 2 but its just not shown on the diagram. Is there a source of bushings anywhere I can order from? Punching the part number into google shows 2 places that seem to be in the UK but they don't list them as in stock, just that they can order them. I'm going to assume they won't be able to since 1HX-231xxx shows nothing for local Yamaha dealers Can't find any on ebay or aliexpress either. Plenty of fork seals, no bushings Help??
The clunking u hear will more than likely be the fork springs wacking on the tube when u brake hard ..... mine does it.
I don't see how that could happen, the springs should be under tension by preload spacers at all times. It doesn't have to be braking hard. If I have the bike parked and I pull the front brake on and slowly rock the bike back n forth I can both feel and hear the clunk
Yep. If I squat down next to the bike and rock it with the front brake on I can hear something clunking away. Hard to pinpoint where exactly but its definitely somewhere in the front end. Brake caliper is solid and isn't moving so its not loose bolts there. Can't imagine the speedo drive would make any noticeable noise which pretty much leaves headstem bearings or fork bushings
So I pulled the forks and triple clamps, glad I did for 2 reasons At some point the headstem bearings had been swapped out for tapered roller bearings. Glad they did as it makes it a lot easier to get replacements (unless the factory changed that in the 89 model bikes??) but at some point they've been re-greased without removing all the old grease. As such it had started to convert to a thick paste, not great. Cleaned all that up and redid it, retorque'd the bearings and got it turning effortlessly, much better than before. Grabbed the forks and rocked the bike back n forth vigorously, no play in the bearings. They're good The forks..... I can see that the fork seals had been replaced fairly recently, which is all well and good but i'd already ordered seals in preparation (doh!). The fluid was fair in color but there was WAY too much in each fork leg. When I removed the cap, I compressed the fork tube and oil pissed out everywhere. When I measured it there was about 350ml of oil in the left leg and 360ml plus whatever spilled out of the right, so i'd guess 390ml which I believe is the spec for the 3LN series? But obviously not this one as it wouldn't have been able to compress all the way through its stroke. Lucky the seals didn't blow out Anyway put 275ml of fresh 5wt oil in. Should take out most of the harshness, just hope it doesn't seem all soppy in the front now, as the spring rate felt good before, obviously because the forks were struggling to compress from way too little air gap Anyway with the fork spring out I grabbed the tubes of each fork and tried twisting them to get any wiggle, they feel solid. And compressing the forks with my body weight didn't show any clunking. Bushings are likely to be fine However once I reassembled the bike, clunking still there. So upon further thought i'd say it very well might be the speedo drive. It slides into the left fork leg which stops it from rotating. I'd hazard a guess that its developed some slop over the years and it's causing it to rotate back n forth, knocking against the stop in the fork leg. I'll be sure to check that at some point
