Author Topic: cb400f rear hub noise  (Read 607 times)

0 Members and 3 Guests are viewing this topic.

Offline hawaiikid

  • 1975cb400f
  • Full Member
  • *
  • Posts: 62
cb400f rear hub noise
« on: October 18, 2021, 02:41:56 AM »
I Have a clicking noise that appears to be coming from my rear hub. It can be felt in my footpegs as well and increases with speed. I am thinking it is due to old worn cush rear wheel dampers; the ones that hold the four sprocket studs. the replacement part shows as 41241-286-000. wondering if anyone has an idea if that is what is causing the noise and if they know a good place to source (4) replacements. I understand they are a pain to remove and would like to hear any and all tricks to remove them. I hope to attempt the replacement without removing my newly mounted tire/tube. I installed new bearings about 350 miles ago, the brake pads are older. When trying to duplicate/troubleshoot with bike on centerstand I cant hear the clicking noise at all. If anyone has experienced this issue and can share the remedy it would help out.

Offline RAFster122s

  • I feel like a really really
  • Really Old Timer ...
  • *******
  • Posts: 12,377
  • SOHC4 member # 2605
Re: cb400f rear hub noise
« Reply #1 on: October 18, 2021, 03:23:51 AM »
Loosen the axle to provide room to carefully inspect every link of your chain. I think you might have a chain issue.
David- back in the desert SW!

Offline newday777

  • Really Old Timer ...
  • *******
  • Posts: 5,299
  • Avatar is my 76 K6 in Colorado w/Cody on back 1980
Re: cb400f rear hub noise
« Reply #2 on: October 18, 2021, 04:41:32 AM »
Loosen the axle to provide room to carefully inspect every link of your chain. I think you might have a chain issue.
Yup a dirty chain can give this. Give your chain a good cleaning and fresh lube if you haven't done this yet.

Cush bumpers are not hard to replace. You definitely don't remove the tire and tube from the rim to change the bumpers..... Where did you get that idea from hawaiikid?
Just remove the wheel from the bike, remove brake assembly and pull the sprocket drive assembly by pulling out from the cush rubbers then push the rubbers out from the brake side(mushroom tits hold them in place). Little rub of lube on the new tits, push in the holes and gently pull in place with needlenose pliers.
Stu
Honda Parts manager in the mid 1970s Nashua Honda
My current rides
1975 K5 Planet Blue my summer ride, it was a friend's bike I worked with at the Honda shop in 76, lots of fun to be on it again
1976 K6 Anteres Red rebuilding project, was originally my brother's that I set up from the crate, it'll breath again soon!
Project 750s, 2 K4, 2 K6, 1 K8
2008 GL1800 my daily ride and cross country runner

Prior bikes....
1972 Suzuki GT380 I had charge of it for a year in 1973 while my friend was deployed and learned to love street riding....
New CB450 K7 after my friend returned...
New CB750 K5 Planet Blue, demise by ex cousin in law at 9,000 miles...
New CB750 K6 Anteres Red, to replace the totaled K5, I sold this K6 at 45k in 1983, I had heavily modified it, many great memories on it and have missed it greatly.....
1983 GL1100A, 1999 GL1500 SE, 1999 GL1500A

Offline hawaiikid

  • 1975cb400f
  • Full Member
  • *
  • Posts: 62
Re: cb400f rear hub noise
« Reply #3 on: October 18, 2021, 08:04:52 PM »
i think i meant to say the worn out bush rear wheel damper is the culprit making the noise. part no. 41241-286-000. not sur though> sprockets and chain only have 350 miles on them and are well lubed/cleaned.