« previous next »
Pages: [1]   Go Down

Author Topic: CB400T Surging  (Read 859 times)

0 Members and 1 Guest are viewing this topic.

Offline KB02

  • Take it easy there, Sonny, I'm an
  • Old Timer
  • ******
  • Posts: 3,760
CB400T Surging
« on: August 23, 2008, 03:05:26 AM »
So, While I wait for work to be done on my Ducati, I have been riding my Wife's 400 Twin (Honda CB400t, 1978, Hawk). I have noticed that it has a surge to it as you ride down the road. It feels like something in the drive line. If I put the bike on the center stand, I can spin the rear wheel and I notice no tight spots on the chain, The rear wheel spins true and doesn't seem to out of round or anything. The rear sprocket looks to be fine. Where else should I look on this?
Logged
1978 CB750K Project
2000 Ducati ST2
...and a pedal bike

Join the AMA today!!

My project thread Part I: K8 Project "Parts Bike"
My project thread Part II: Finishing (yeah, right) touches on Project "Parts Bike"

Offline tonycb650

  • Enthusiast
  • **
  • Posts: 182
Re: CB400T Surging
« Reply #1 on: August 23, 2008, 10:11:57 PM »
May be a front brake problem (warped disc?).
Logged
80cb650c 80 cm400

Offline kirkn

  • Expert
  • ****
  • Posts: 1,046
Re: CB400T Surging
« Reply #2 on: August 24, 2008, 09:09:07 AM »
If you pull in the clutch at speed and coast, does the surge go away?  That'd confirm if its in the engine vs. a driveline issue.

Otherwise, check the same out-of-round or out-of-true for the front wheel.

That's about all I can think of without a better description of the symptoms.

Kirk
Logged
Pages: [1]   Go Up
« previous next »