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Author Topic: My CB400f Supersport project  (Read 2317 times)


Offline Integra99

  • Posts: 57
Re: My CB400f Supersport project
« Reply #21 on: Oct 10, 2017, 06:33:34 »

Just skimmed your build Sonic.. lovely bike!!

I've just had a full Delkevic system arrive today.. I'm now getting very excited about this bike... its sounds crazy as its my 3rd build but its suddenly dawned on me when its finished I will have a brand new CB400f SS with a twist!

This bike will be my ride to work and around town bike next spring.. and finally a bike that I intend to carry a pillion as my son and daughter are desperate to come to my local bike night!!

Offline Integra99

  • Posts: 57
Re: My CB400f Supersport project
« Reply #22 on: Oct 11, 2017, 10:26:25 »
Bit more work last night, finished restoring the rusty old airbox, and chuffed with the rubber mounts bought from china for 2..  they took 4 weeks to arrive but can't fault them.

Sprayed up the foot rest mounts so a few more coats later tonight.

New rear pads arrived but still waiting on the custom sprockets!




Offline Integra99

  • Posts: 57
Re: My CB400f Supersport project
« Reply #23 on: Oct 11, 2017, 10:27:08 »
Also my Delkevic arrived.. a big deliberation over the beautiful OEM pipes vs the Delkevic but I wanted to create a bike that was different and I'm very happy!




Online innovativems

  • Posts: 408
    • Innovative MotoSports
Re: My CB400f Supersport project
« Reply #24 on: Oct 11, 2017, 10:32:34 »
Looking great!  You will be happy with the delkevic system.  I have one on my cb550 and cb350f.  Very happy with them


Sent from my iPhone using Tapatalk

Offline Integra99

  • Posts: 57
Re: My CB400f Supersport project
« Reply #25 on: Oct 11, 2017, 10:38:38 »

Thanks.. I cant wait to build it up once I have the engine back!

I'm a bit unsure about the back of the bike.. I really want to carry a pillion so my girlfriend can hop on but want to make it look better than the huge stock seat.. so lots of tea drinking looking at the bike with some mates this weekend.. and a few beers!

Offline Integra99

  • Posts: 57
Re: My CB400f Supersport project
« Reply #26 on: Oct 17, 2017, 06:57:29 »

Friends down for the weekend so not huge progress but finally got all the 2 pack paint off the tank an into primer, needs filling and sanding but its just nice to get in into a workable stage!

New pads arrived too so rear brake set up all working, awaiting custom sprockets and chain plus the engine so I can get that installed ASAP.


Offline Integra99

  • Posts: 57
Re: My CB400f Supersport project
« Reply #27 on: Oct 31, 2017, 08:50:22 »

Been busy.. engine now in... delkevic headers on and a lovely machined bush made for my gear linkage slop problem. 









The build cost has lost the plot..and I have so much left to do but its a lovely distraction from work.. I'm not planning another build for a while, once this is done I can finish the next stage of my XS750.

Offline Integra99

  • Posts: 57
Re: My CB400f Supersport project
« Reply #28 on: Nov 15, 2017, 07:04:02 »

Well a quick update on the build... like all projects.. I've now gone back two steps.. the engine paint isnt fuel proof it seems, so its back out again and 4 bolts in the head need helicoils. Also the front mudguard bracket is causing me trouble... as lowering it by taking a section out simply isnt going to work..  The bracket is good so I'm going to leave it for now , it sits a little too high for my liking but we can address later.

On the positive the carbs have turned out amazing and are as good as new internally.

The Delkevic exhaust it seems was designed for a 75 - 77 , they are going to help with the issue or I'll make a bracket of some sort. I've now shorted the seat base.. which has turned out well... CB400f owners will curse me.. but the std seat is sooo long!

It was good to get the bike out in daylight.. still unsure on tank color.. so it can stay as is until I decide. Next job, modify the airbox to hold the new regulator. Once the engine is back from paint we can get cracking and back together at start to make progress as most of the work is now done, but run out of funds till next month now so electronic ignition will have to wait.. I can at least get the wiring loom in place.

A few pics...







Just when I was getting a bit demotivated at the cost and time of this build I found this old picture of the carbs and engine at strip down and realised how far we've come..!



Offline briandk

  • Posts: 14
Re: My CB400f Supersport project
« Reply #29 on: Nov 15, 2017, 16:01:04 »
Looking really good. The stock headers are beautiful of course, but these are not bad at all.
Had a CB400F about 15 years ago and loved it, this almost makes me want to look around for another :)