So, there is this clunk that happens when I hit a bump.
I couldn't figure it out, since everything seemed solid, until I happened to notice that the dash was kinda floppy in the fairing when I took the fairing off. It seems the rubber bushings that hold the dash in the fairing are dried up and shrunken, and so they let it flop around.
Seems this is still available from Yamaha - part 36Y-83523-00-00.
Haven't ordered them yet, but will when opportunity presents itself.
The dash needs some freedom of movement to damp the bumps and vibration. Don't make it too stiff. A clunk in the front, over bumps may be steering stem/head bearings. Could be loose, or have flat spots as most of the time you are hitting bumps, Your are riding in straight forward line. Hitting the bearings in the same place over and over...
You can add some washers to take up the slack or grind the inner collar to allow the bolt to clamp more.
Whatever you do, do not overtighten the gauges, there needs to be some wiggle.
Mines got a clunk over speed bumps etc as well, been there since I've had it and I can't seem to find the cause. Steering head bearings have been adjusted, fairing has been pulled off and checked several times, forks have been rebuilt, gauge mountings were modified, but nothing seemed to make any difference.
The clunk sounds like it's coming from the top somewhere, but recently I had the Gopro mounted to the crash bars on a ride, and noticed a clonking sound going over bumps in the footage with it mounted way down there, so I'm thinking maybe the front guard could be the culprit. Haven't checked it yet, but one day I might pull it off and go for a ride to see if that fixes it.
I had a similar noise on my 93 FJ... Tracked down to headlamp reflector being loose in the headlamp some silicone around the ball joints on the adjusters did the trick as long as I don't need to adjust it again :dash2:
Most people don't realize that front end clunk often is caused by the brake pads..
The pads hang loose on their pins and can give a rather loud clunk when going over bumps.
Next time you go over a bump, try to activate the front brake just a little. If no clunk, you have found the reason :good2:
Quote from: 4everFJ on September 13, 2015, 02:18:26 AM
Most people don't realize that front end clunk often is caused by the brake pads..
The pads hang loose on their pins and can give a rather loud clunk when going over bumps.
Next time you go over a bump, try to activate the front brake just a little. If no clunk, you have found the reason :good2:
I thought part #9 in this picture was supposed to prevent that.
http://www.yamahapartshouse.com/oemparts/a/yam/50042dbdf8700209bc78a120/front-brake-caliper (http://www.yamahapartshouse.com/oemparts/a/yam/50042dbdf8700209bc78a120/front-brake-caliper)
On my '85, the clunk in the front end was the springs deflecting inside the fork tubes and banging against them on compression.
Quote from: biggo on September 13, 2015, 01:54:33 AM
headlamp reflector being loose in the headlamp
yes! mine too. this is often the cure for "checked-everything-but-the-front-still-clunks-over-bumps"