ninjette.org

Go Back   ninjette.org > General > General Motorcycling Discussion

Notices

Reply
 
Thread Tools
Old August 8th, 2018, 06:47 PM   #1
corksil
ninjette.org certified postwhore
 
Name: TC
Location: Hawaii
Join Date: Sep 2013

Motorcycle(s): A lot.

Posts: A lot.
Fork seals leaking after hard bumpy ride?

Surely this has been discussed before but the forum has been a little slow lately so figured I'd post it for a quick opinion or two.

I have rebuilt my forks 3 times now and seem to have found an excellent combination of preload/spring-tension/oil-level/oil-weight.

The road I use to test the forks is extremely rough. Year and years of patched potholes, it makes your vision blurry and you need to clench your jaw so your teeth don't rattle. It's very bumpy. Very. That's my point.

So after blasting down it and back at 37mph and after nailing a few speed bumps at 50 or 60mph (not joking) ---- my right fork seal started leaking. All the way down the lower tube and almost onto the brakes before I limped it home.

The bike went through an absolute suspension torture test. The front seems 100% dialed in and feels perfect. Yet the fork seal leaked. Don't think I lost much fluid. Planning on riding the bike more to see if it leaks more.

Maybe it only leaked because I nailed a few speed bumps at 60mph.

I don't think anything in there was improperly installed, it's all mechanically sound.

No scratches or gouges on the fork tube.

Why did it leak? Time will tell if it leaks more.

Did I exceed what this bike was mechanically engineered to do?

Maybe the design of these forks simply cannot handle the abuse I put them through.

Any thoughts? Thanks!
__________________________________________________
Just batshit crazy. All his posts are endless diatribes. Some are actually entertaining but mostly batshit crazy.
corksil is offline   Reply With Quote




Old August 8th, 2018, 07:20 PM   #2
Ceeloo Yello
ninjette.org member
 
Name: C
Location: Hawaii
Join Date: May 2011

Motorcycle(s): 250

Posts: 80
What was the quality of the seals? I got some cheap china seals off of amazon and put in the emulators as well as new springs and heavier fluid last year and still no leaks.
__________________________________________________
"It ended up being the loose nut behind the wheel"
Ceeloo Yello is offline   Reply With Quote


Old August 9th, 2018, 02:13 AM   #3
Burphel
ninjette.org member
 
Burphel's Avatar
 
Name: Brian
Location: NW USA
Join Date: Aug 2016

Motorcycle(s): Triumph Bonneville, Ninja 300

Posts: 203
Well, it ain't meant to be a dirtbike. Any time you're putting it through that much abuse, there's a chance you'll blow a seal. Especially if you're running a higher oil level/smaller air gap. If you're happy with the setup otherwise, I'd say replace the seal, top up the oil, and go ride it like a street bike instead of a supermoto.
__________________________________________________
Let he who has never re-used a crush washer cast the first stone...
Burphel is offline   Reply With Quote


Old August 21st, 2018, 10:13 PM   #4
corksil
ninjette.org certified postwhore
 
Name: TC
Location: Hawaii
Join Date: Sep 2013

Motorcycle(s): A lot.

Posts: A lot.
Thank you both for the advice.

The bike definitely isn't a supermoto. Nailing speed bumps at speed is a bad idea and I was asking for trouble.

Does anyone know what the oem 09' fork seal sizes are?

Quote:
should have fitted as they are size 37x50x11mm (FDK: 011/069)
..... does that sound correct?

Thanks!
__________________________________________________
Just batshit crazy. All his posts are endless diatribes. Some are actually entertaining but mostly batshit crazy.
corksil is offline   Reply With Quote


Reply




Similar Threads
Thread Thread Starter Forum Replies Last Post
DIY- Replace fork seals, dust seals and fork oil shortstuff 2008 - 2012 Ninja 250R Tech Talk 202 October 15th, 2014 09:45 AM
[motorcyclistonline] - Leaking Fork Seals | FAQs Ninjette Newsbot Motorcycling News 0 September 22nd, 2014 07:10 PM
right fork tube seems to be leaking.. NinjaBoyEddy 2008 - 2012 Ninja 250R Tech Talk 1 November 18th, 2013 04:36 PM
can i ride the bike with burst fork seals Vinash 2008 - 2012 Ninja 250R Tech Talk 5 April 11th, 2012 07:43 AM
Leaking fork seal? EthioKnight 2008 - 2012 Ninja 250R Tech Talk 12 March 6th, 2012 09:20 PM


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


Motorcycle Safety Foundation

All times are GMT -7. The time now is 06:20 PM.


remote server monitor
Powered by vBulletin®
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
User Alert System provided by Advanced User Tagging (Lite) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Except where otherwise noted, all site contents are Copyright 2016 ninjette.org, All rights reserved.