March 30th, 2014, 03:45 PM | #1 |
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Name: James
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Front end "clunk" after drop
Ok folks, I'm back with more issues. My roommate recently dropped my ninjette and I'm in the process of getting back on the road. After he dropped it I walked it back to the house and that was the first time i noticed the noise. It's coming from the front end somewhere and it's a sort of clunk at a certain spot in every wheel rotation.
I changed the front wheel bearings and it still makes that noise. There's no pulsing in the front brake and it seems to ride fine. I only hear the noise when going slowly but I can feel it through the bars. I though it may be the forks but that doesn't explain the rotation thing. I've done a lot of searching and am on the verge of taking it to a shop. Any ideas? Also, my front sprocket seems to be making a ticking/whirring sound when I ride. I changed them not too long ago but everything seemed good to go. I feel like this bike is 30 years old with all this ridiculousness going on! Any help with either issue would be greatly appreciated. Thanks
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March 31st, 2014, 06:13 PM | #2 |
ninjette.org member
Name: James
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No one has experienced this, huh? I rode to and from work today and it seems to be getting a bit work. I'm not sure if it could be that the front brake rotor is warped. Now when I roll the bike it seems more prevalent than before. The noise always seems to happen at the same spot in the rotation. I think I'll have a mechanic diagnose it for me but I'm still hoping for some feedback from you guys.
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March 31st, 2014, 06:26 PM | #3 | |
Daily Ninjette rider
Name: Hernan
Location: Florida
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Quote:
http://faq.ninja250.org/wiki/Reinsta...he_front_wheel Normally, the problem is in the last thing that one touches............and you have removed and re-installed your wheel for the bearings' change out.
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April 1st, 2014, 04:39 AM | #4 |
ninjette.org member
Name: James
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Hmmm, it could be possible. It started making the noise before I changed the bearings out though, just after the drop. Riding today I did notice some pulsing from the front on my way to work. It's only noticeable at under 10 mph. I'm now worried that it's the brake rotor. I'd rather not spend $300 like that.
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April 1st, 2014, 04:50 AM | #5 |
Board Member
Name: ...
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use a dial indicator or a screwdriver mounted to the fork leg to check runout on the disc. If you feel vibrations from the front though it is more than likely not the rotor but something in the wheel. I would pull the wheel feel the bearings for smoothness and check the speedo cable assembly. From there, you could check your steering bearings but that would be an outside chance of being the issue.
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April 9th, 2015, 11:40 AM | #6 |
ninjette.org member
Name: James
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It's Happening Again
Hey guys, I hate to revive an old topic but this issue is happening again for me. I replaced the brake disc which solved it at first. The front brake feels great but at low speed I can hear something clunking. When I had the front wheel off I pulled the caliper pistons and cleaned/lubed everything. I did notice the pad side of the pistons had some gunk that I couldn't get off. I'm thinking maybe that gunk is causing the pistons to not return all the way. There isn't an abnormal feel to the front brake, just the noise.
I replaced the wheel bearings about a year ago (maybe 10,000 mi.). I need to get a front stand to pull the caliper apart again. Is this a major hazard? I prolly won't be able to get a stand until next week. I think I may order some new pistons just to be safe. Any thoughts or suggestions would be appreciated.
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April 9th, 2015, 11:51 AM | #7 | ||
in your machine
Name: Scott
Location: Summer Shade, Ky.
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A few things to consider and check.
First is proper fork alignment, then did you service the calipers and sliders? How-to on forks, Quote:
Quote:
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April 9th, 2015, 11:52 AM | #8 |
The Corner Whisperer
Name: Chris (aka Reactor)
Location: Northern KY
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Divide and conquer!
Push down really hard on your bars to bounce them up and down? Clunk? Check if it's just bottoming out the forks (seals leaking) or the stem nut needs tightened. Lift the front wheel, spin it by hand. Clunk, rubbing, grinding? Bearings, rotor, caliper, speedo. Spin front wheel by hand again, get it going pretty fast. Pull the front brake quickly. Cluck? Caliper bolts/pistons, pads.
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April 9th, 2015, 11:55 AM | #9 |
ninjette.org member
Name: James
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Thanks for the quick replies, folks! I'll check those things. I did service the caliper pistons and sliders although I didn't change the seals. The fork alignment thing is interesting. I'll post back with any findings.
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April 9th, 2015, 11:57 AM | #10 |
in your machine
Name: Scott
Location: Summer Shade, Ky.
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Chris made some good points as well. I'm not familiar with NewGen does it have a center stand?
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April 9th, 2015, 12:01 PM | #11 |
The Corner Whisperer
Name: Chris (aka Reactor)
Location: Northern KY
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Nope
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April 9th, 2015, 12:09 PM | #12 |
in your machine
Name: Scott
Location: Summer Shade, Ky.
Join Date: Oct 2014 Motorcycle(s): 98 Ninja 250/F12 aka ZX-2R "SERENITY", 91 Ninja 500/A5 aka ZX-5R "Phoenix", 84 Honda GL1200A "SIREN" Posts: A lot.
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Awesome, thanks Kawasaki
If your working inside, hopefully you have exposed beams, just sling the front-end up if possible. If you had center stand it would just be added some ballast to the rear of the bike.
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April 9th, 2015, 12:25 PM | #13 |
in your machine
Name: Scott
Location: Summer Shade, Ky.
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Some other things to consider,
Abnormal frame or suspension noise Front end noise Low fluid level or improper viscosity in forks. Can sounds like spurting and is usually coupled with irregular fork action. Spring weak or broken. Makes a clicking or scraping sound. Fork oil will have lots of metal in it. Steering head bearing loose or damaged. Clicks when braking. Fork clamps loose Fork tube bent. High probability if the bike has been dropped. Axle or clamp bolt loose. Handlebars hard to turn Front tire pressure low Steering stem bearing adjuster nut too tight Bearings damaged. You can feel roughness as you turn the bars side to side. Races dented or worn out. Denting can occur from dropping the bike or impact with an immovable object or a hole Steering stem lubrication inadequate. Repack bearings Steering stem bent. Can happen from dropping the bike or from hitting a curb or hole. Do not try to straighten the stem.
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April 9th, 2015, 01:06 PM | #14 |
ninjette.org member
Name: James
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Aaaaaaha!
Bad fork seal. The left side is good, but I'm assuming I should just do both. I've never done it before. Is it tough to do, what will I need as far as replacement parts/seals?
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April 9th, 2015, 01:11 PM | #15 |
in your machine
Name: Scott
Location: Summer Shade, Ky.
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Here's a couple of how-to guides, read these, any questions feel free to ask.
http://www.ex-500.com/wiki/index.php...rk_Maintenance http://faq.ninja250.org/wiki/How_do_..._fork_seals%3F Also a good time to any any modifications to the forks, either springs, cutting or new ones, changing fork oil weight, etc..... It all depends on your budget. https://www.ninjette.org/forums/showthread.php?t=186192 https://www.ninjette.org/forums/showthread.php?t=222763
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April 9th, 2015, 01:15 PM | #16 | |
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Quote:
Also, I wont be able to do this for at least a few days and all I have to get around on is the bike. Could this potentially be dangerous to keep riding?
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April 9th, 2015, 01:19 PM | #17 | |
in your machine
Name: Scott
Location: Summer Shade, Ky.
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Quote:
Everyday commuting you'll be fine.
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April 9th, 2015, 01:23 PM | #18 |
The Corner Whisperer
Name: Chris (aka Reactor)
Location: Northern KY
Join Date: May 2011 Motorcycle(s): 2010 250 (track), 1992 250, 2006 R6 (street/track), 2008 R6 (track) Posts: Too much.
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Avoid speedbumps and potholes or you could also be replacing part 44065 at the bottom of the fork tube.
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April 9th, 2015, 01:26 PM | #19 |
in your machine
Name: Scott
Location: Summer Shade, Ky.
Join Date: Oct 2014 Motorcycle(s): 98 Ninja 250/F12 aka ZX-2R "SERENITY", 91 Ninja 500/A5 aka ZX-5R "Phoenix", 84 Honda GL1200A "SIREN" Posts: A lot.
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April 9th, 2015, 01:28 PM | #20 |
ninjette.org member
Name: James
Location: Asheville, NC
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Ok, nice. Now I just need to order the seals and away I go. I was reading on Ninjette that the '88-'07 are a different diameter than the '08-'12. I've seen a few kits listing '88-'12 for compatibility.
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April 9th, 2015, 01:34 PM | #21 | |
in your machine
Name: Scott
Location: Summer Shade, Ky.
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Quote:
Different part #s as well PreGen: http://www.partzilla.com/parts/searc...ORK/parts.html NewGen: http://www.partzilla.com/parts/searc...ORK/parts.html
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April 9th, 2015, 01:44 PM | #22 |
in your machine
Name: Scott
Location: Summer Shade, Ky.
Join Date: Oct 2014 Motorcycle(s): 98 Ninja 250/F12 aka ZX-2R "SERENITY", 91 Ninja 500/A5 aka ZX-5R "Phoenix", 84 Honda GL1200A "SIREN" Posts: A lot.
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Here this should clear things up, part # 56-123 is what you want, according to All Balls website
http://www.allballsracing.com/ymmsea...earchfromhome/
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April 9th, 2015, 03:23 PM | #23 |
RIP Alex
Name: Cuong
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Fork seals are easy peasy. It looks daunting at first but once you have it disassembled it'll make sense. First times are always long but you'll have a better understanding of the dynamics.
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