collapse

www.dimecitycycles.com

www.cognitomoto.com

https://www.townmoto.com/collections/vanson-leathers

www.speedmotoco.com

www.CITYLIMITMOTO.com

www.jadusmotorcycleparts.com

www.lostapostlejewelry.com

www.sparckmoto.com

www.pistonsociety.com


Author Topic: Another Honda CB400F cafe racer  (Read 63519 times)

Offline swan

  • DTT SUPPORTER
  • *
  • DTT BOTM WINNER
  • *
  • Posts: 1004
  • Kickstart, shift on right, drum brakes and spokes
    • 1962 BSA Gold Star barn find restoration
Re: Another Honda CB400F cafe racer
« Reply #50 on: Dec 23, 2012, 13:29:30 »
Alright, snow is here and it is time to work on bikes. My matched sets of replacement Honda needles and emulsions arrived las week and I installed them in the original carbs for this bike (CB400F #4). The difference is night and day. PERFECT idle, no more idle hang and I was able to synch the carbs in less than two minutes. The bike has never ran or sounded better. It is going to be a loooooong wait until spring. A long and hard lesson learned: use OEM Honda carb parts.


I broke and cleaned the carbs (again) and while I was in there, I tossed out the original phillips screws holding the arm plate to the throttle valve and replaced them with hex head screws. It is much easier to get inside the throttle valve with a thin 2mm hex wrench than a screwdriver.



OEM Honda needle and clip (top), after market (bottom). Dimensionally they are very close but note the color difference.

OEM Honda emulsion tube on left, aftermarket on right. Note the difference in the needle seat design.
Others have reported the brass used in after after market carb parts are softer and wear quickly.

I cannot take credit for this idea, somewhere on my CB400f carb research I read about replacing main jet springs with a spring and clip (Thank you Davis96 http://forums.sohc4.net/index.php?topic=101803.msg1137530#msg1137530). My jet springs were in really bad shape, they are no longer available so I went with the spring set up and it works great.



I will go over the bike one more time, re-tighten all the nuts and bolts, tweek the seat cover a bit, a good cleaning and then tuck her into her warm bed until spring. I will ride another 50 or so shakedown miles and then sell her. I think I am going to start on my other CB400F (#5) this week when my new seals and gasket sets arrive. I plan to strip it to the crank and restore it to stock factory condition and sell it too this spring. I'll do another thread for it soon. Happy holidays all!

« Last Edit: Dec 27, 2012, 21:10:20 by swan »
1966 Triton cafe, 1962 BSA Gold Star DBD34, and 1966 T120 Triumph Bonneville.
BSA Gold Star barn find restoration
1975 CB400F Cafe Racer build
1966 Triumph Bonnevile restoration

Offline McMahon130

  • Posts: 2
Re: Another Honda CB400F cafe racer
« Reply #51 on: Feb 03, 2013, 20:20:58 »
I just picked up a 1975 400F SS that I am hoping to build up.  It is in excellent running condition, but does need a little work.  My plans with it are to replace the front master cylinder as the brakes squeak; clean out the engine, carbs; redo the entire wiring; remove the electric start; repaint the tank; and do some minor cosmetics.  I am still getting caught up on this thread, but I came across your tank work, and I am curious where you got the Honda SS graphics.  Can you give me some insight on this please?

Offline swan

  • DTT SUPPORTER
  • *
  • DTT BOTM WINNER
  • *
  • Posts: 1004
  • Kickstart, shift on right, drum brakes and spokes
    • 1962 BSA Gold Star barn find restoration
1966 Triton cafe, 1962 BSA Gold Star DBD34, and 1966 T120 Triumph Bonneville.
BSA Gold Star barn find restoration
1975 CB400F Cafe Racer build
1966 Triumph Bonnevile restoration

Offline McMahon130

  • Posts: 2
Re: Another Honda CB400F cafe racer
« Reply #53 on: Feb 04, 2013, 18:39:39 »
Thank you! This is exactly it. 

Offline swan

  • DTT SUPPORTER
  • *
  • DTT BOTM WINNER
  • *
  • Posts: 1004
  • Kickstart, shift on right, drum brakes and spokes
    • 1962 BSA Gold Star barn find restoration
Re: Another Honda CB400F cafe racer
« Reply #54 on: Apr 05, 2013, 14:57:10 »


Took the first ride of the season yesterday on my Triton and the first ride on this CB400F today. Wow, I love this bike and she is so happy. Charged the battery, fresh gas into clean carbs and she fired right up into a smooth idle. I forgot how good this bike sounds and moreover how fun it is to ride. I went out and stretched her legs, blew dust off, broke a few laws, but nobody got hurt. Gonna clean her up and sell her. This is going to be a difficult goodbye...
« Last Edit: Apr 05, 2013, 15:02:22 by swan »
1966 Triton cafe, 1962 BSA Gold Star DBD34, and 1966 T120 Triumph Bonneville.
BSA Gold Star barn find restoration
1975 CB400F Cafe Racer build
1966 Triumph Bonnevile restoration

Offline SONIC.

  • DTT SUPPORTER
  • *
  • Posts: 6183
  • Reminds me of...me No, I'm sure of it. I hate him
Another Honda CB400F cafe racer
« Reply #55 on: Apr 05, 2013, 16:10:13 »
Don't sell!
Haha

Offline Worst cb650 ever

  • Posts: 1491
  • You can always get it running with time or money.
Re: Another Honda CB400F cafe racer
« Reply #56 on: Apr 05, 2013, 16:18:03 »
Yea Swan, can we send our problem child bikes to you and have you rebuild them to your level of quality?  ;D
DTT Blue (cause Winter is Coming) CB360 Club.

1995 CBR900RR - a winter flip not worth a DTT writeup - Sold

1986 Yamaha SRX600 - mailed to me from California - build coming soon?

1983 VF750F

1976 CB360T

1993 CBR900RR - Sold

1979 CB650 - Sold

Offline o1marc

  • Posts: 2240
    • Creative Candy Powder Coating
Re: Another Honda CB400F cafe racer
« Reply #57 on: Apr 05, 2013, 16:21:33 »
What will you ask for that bike?

Offline swan

  • DTT SUPPORTER
  • *
  • DTT BOTM WINNER
  • *
  • Posts: 1004
  • Kickstart, shift on right, drum brakes and spokes
    • 1962 BSA Gold Star barn find restoration
Re: Another Honda CB400F cafe racer
« Reply #58 on: Apr 05, 2013, 18:20:19 »
Thanks guys, actually a friend dropped off a 72 BSA Lightning for me to go through the carbs, timing, chain, tires and hubs. I do not have a shop rate and do this soley for fun, but he was making hints about giving/selling cheap a 1966 Honda 305 he wants me to have, hmmmm, next project???

I would like $3800 for this CB400F. Mechanically sound, frame up paint, new spokes, tires, new seat, running beautifully etc. Way too much time getting the carburation perfect. The only issues are the front fender and a weird clear coat issue on the tank I am not happy with. I have not decided whether to go Craigslist or E-bay. Tomorrow.
1966 Triton cafe, 1962 BSA Gold Star DBD34, and 1966 T120 Triumph Bonneville.
BSA Gold Star barn find restoration
1975 CB400F Cafe Racer build
1966 Triumph Bonnevile restoration

Offline Worst cb650 ever

  • Posts: 1491
  • You can always get it running with time or money.
Re: Another Honda CB400F cafe racer
« Reply #59 on: Apr 05, 2013, 21:34:52 »
I think we'd just like to see you do another build now that the Gold Star is coming to an end.  The 305 is a lovely bike that would make a nice restoration, I'd think.
DTT Blue (cause Winter is Coming) CB360 Club.

1995 CBR900RR - a winter flip not worth a DTT writeup - Sold

1986 Yamaha SRX600 - mailed to me from California - build coming soon?

1983 VF750F

1976 CB360T

1993 CBR900RR - Sold

1979 CB650 - Sold