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Valkyrie Riders Cruiser Club > General > 1500 Tech Board > Clunk from accel to decel
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Author Topic: Clunk from accel to decel  (Read 1280 times)
WarrenK
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Posts: 39


Eau Galle, WI


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« on: May 08, 2012, 08:07:08 AM »
I have recently noticed a clunk in the drive line when I throttle up or down (change from acceleration to deceleration) in any given gear.  I dont remember hearing this before, but do not think this is normal.  Undecided  Sound seems to be coming from area of u-joint.  Spline lube has always been done at normal intervals, I put new tire on recently and splines were just fine, have always tightened the last 4 bolts on final drive AFTER wheel installation, per instructions.   I have 52K on the clock- have pulled trailers.

There does not seem to be any vibration or unusual noises.  .  .  . but I suspect the u-joint.  Have ordered u-joint and boot-  am I on the right track?
Could there be other possible causes for the clunk?
Thx
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Ricky-D
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Posts: 5031


South Carolina midlands
« Reply #1 on: May 08, 2012, 08:11:14 AM »
You can inspect the u-joint be removing the rear brake pedal assembly and reservoir, pulling back the swingarm boot.

You can do this on the sidestand but lifting the rear tire allows better inspection practice.

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« Last Edit: May 09, 2012, 06:28:37 AM by Ricky-D » Logged
2000_Valkyrie_Interstate
Bone
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Posts: 1596
« Reply #2 on: May 08, 2012, 09:37:39 AM »
About 2 hours ago I took my Valk out for a test drive. Just installed a new u-joint. I can't believe how much better it feels (drive train) when opening / closing the throttle and shifting. Wasn't sure it was a u-joint so I started removing one piece at a time. Was surprised how bad the u-joint was and still worked. Would have parked it much earlier if I knew it's condition.

Took 10 days to get the part through HDL but the price was good about $65.
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Michvalk
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Posts: 2002


Remus, Mi
« Reply #3 on: May 08, 2012, 04:23:10 PM »
The rubber dampners in the wheel can cause the clunk as well cooldude
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Thunderbolt
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Worthington Springs FL.
« Reply #4 on: May 08, 2012, 05:58:59 PM »
Probably U-joint, but could be dampers or splines.
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WarrenK
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Posts: 39


Eau Galle, WI


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« Reply #5 on: May 08, 2012, 06:23:54 PM »
Yes, thanks for the advice on the dampers.
Quote from: Michvalk on May 08, 2012, 04:23:10 PM
The rubber dampners in the wheel can cause the clunk as well cooldude
I forgot to say, installed new dampers last winter and the old ones were done for!  Smiley
I will replace the u-joint soon, looks likely to be the problem.
I will post with results when done!
Thanks, all!
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X Ring
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Posts: 3626


VRCC #27389, VRCCDS #204

The Landmass Between Mobile And New Orleans
« Reply #6 on: May 08, 2012, 10:56:51 PM »
Don't over look the brake calipers.  They float and have been known "clunk" under hard acceleration and braking.

Marty
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People are more passionately opposed to wearing fur than leather because it's safer to harass rich women than bikers.           
shortleg
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Posts: 1816


maryland
« Reply #7 on: May 09, 2012, 06:43:37 AM »
 Check pinyon cup and shaft also.
     Shortleg[Dave]
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