Quantcast
Jump to content

  • Join Today, It's Simple and FREE!

    As a member, you can post in our forums, upload your photos and videos, use and contribute to our downloads, create your own member page, add your ATV events, and even start your own ATV club to host your own club forum and gallery.  Registration is fast and you can even login with social network accounts to sync your profiles and content.

rexy1989

Honda 400ex - Rear Brake Issues

Recommended Posts

i thought i had bent my back disk brake because the pads are making a grinding sound every quarter turn and the caliper was wobbleing so i took it off to replace it and it was not bent ..........could i had bent the actual caliper or was it knocked out of place ?.......are either of these possible if so witch is more likly?

Share this post


Link to post
Share on other sites


Check the caliper mount though i doubt it. It might be the brake rotor or hub mount itself. Its not hard to replace the rotor or hub.

Also I have a big problem with mud caking up inside the caliper. Make sure the caliper is clean and the slide pins are gunk free.

If the noise doesnt bother you leave it..

Sent from my SGH-T989 using Xparent Blue Tapatalk 2

Share this post


Link to post
Share on other sites

ok ill def make sure the caliper is clean i bought new rotor and pads im going to throw them in although i dont think the rotor is the issue ill keep you posted thanks

rexy1989

Share this post


Link to post
Share on other sites


i thought i had bent my back disk brake because the pads are making a grinding sound every quarter turn and the caliper was wobbleing so i took it off to replace it and it was not bent ..........could i had bent the actual caliper or was it knocked out of place ?.......are either of these possible if so witch is more likly?

I`d check your Rotor first !! Calipers are hard to bend or break

Share this post


Link to post
Share on other sites

i replaced the rotor and pads and cleaned the caliper def helped with some but not all the noise ....as far as my caliper wobbling i tightened the bolt that holds the lil mount to the caliper and with the new rotor and pads everything seems the roll nicely.....but decided to roll the quad while the caliper was off and there is still a noise ....... so the issue must be worn out or blown axle bearing i'm assuming ?

rexy1989

Share this post


Link to post
Share on other sites


Its possible its the carrier bearings making the noise. Did you verify that the rotor hub is true?? If the rotor hub is bent the rotor will bend when its bolted onto it. How bad is the noise?

Sent from my SGH-T989 using Xparent Blue Tapatalk 2

Share this post


Link to post
Share on other sites

Last thing would be to remove the rear axle and spin each carrier bearing individually by hand to see if they are making the noise. If no avail post a video of the source of the noise

Sent from my SGH-T989 using Xparent Blue Tapatalk 2

Share this post


Link to post
Share on other sites

hey thanks for the help after finally getting around to fixing the problem it ended up being a blown bearing in the carrier it had a lone star dual bearing carrier in it witch i was not aware of because i bought it used ...3 of the 4 bearings were in ruff shape but still solid i believe thats why there was no play in the rear end ....there was also a crack in the carrier i imagine from the previous owner beating the bearings in so i have ordered an entire carrier assembly just waiting on it once i install it make sure 100% everything's good to go ill let you guys know thanks again for the help

rexy 1989

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Similar Content

    • By 400ex
      So after my 400ex pep up (High comp piston, stage 2 hot cam, and some others), There was a malfunction with the rocker arm jam-nut; guess it wasn't torqued to spec. The rocker arm nut caused the lash to become too out of clearance and I bent a valve on a test rip high in the rpm range. There was no damage to the piston but only that valve, a couple dents in the head, and a completely destroyed valve guide. So I decided to take it upon myself (after watching kenoconnors race porting instructions and reading up on this subject) to port my cylinder head significantly. I had the head decked, cylinder honed and smoothed/polished the dome/exhaust port (intake wasn't polished but dimpled slightly to ensure fuel atomization). So after porting, decking the head, I had all valves and guides replaced/reamed, 5 angle valve job, and recut seats, then I installed xr400 gaskets (for higher compression), carb jets; 42 pilot, 175 or 6 main not sure, dynojet needle, k and n filter with no lid, enlarging of header ports and big gun eco slip on exhaust for a 450r, trx 250r coil (adds 1000+ rpm to limiter), 11:1 85mm piston, stg 2 hc with springs and retainers replaced, and polished rocker arms. I then replaced both sprockets one down in front and stock in rear, o ring chain, and 18in tires. There is a larger list of mods but these were the only ones affecting acceleration/performance. On the dyno, this quad put down 42rwhp and was estimated at 46 to the flywheel. Once again this was 42 to the wheel on the stock bore/carb size/header. All this was done at 16 yrs old. You may not be able to see it in the picture but peak whp was 42 on a mustang dyno.


  • Recently Browsing   0 members

    No registered users viewing this page.


×