Author Topic: Honda 1992 CB400SF  (Read 374 times)

Offline Moorey

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Honda 1992 CB400SF
« on: September 24, 2018, 07:29:31 PM »
Well as there seems to be no shortage of 400 fours I thought I would join in and acquired this on Thurs. What a cracking little bike it is to ride. Uncomfortable at the moment, well downright painful due to needing a new hip which hopefully will be done just after Christmas, but I really do like it. I bought it untried and no mot, took it on Sat for test and it sailed through and rode fine. Lorraine went to Sherburn in Elmet on Sunday on it got there no problems. Coming back it started in the carpark fine but after about 400yds spluttered to as stop. Eventually got it started again and this was repeated time and time again until after about 10mls it decided to sort itself out and came home the remaining 15mls no bother. My thoughts are after draining the tank an looking at the snow white plugs are even though it has a manual fuel tap it is also a vac operated diaphragm valve on as well. I think the diaphragm valve must have been stuck starving it of fuel. Pulled in bits and put back together as it was spotless. I  have done 60mls on it today stopping every mile or so and turning off the engine so the vale would operate and it has been faultless. Anyone any other thoughts as it is going on the back of the van on Weds for a few days away.

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« Last Edit: September 24, 2018, 09:24:53 PM by moorey »

Offline K2-K6

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Re: Honda 1992 CB400SF
« Reply #1 on: September 24, 2018, 08:46:06 PM »
I like those,  good looking bikes I think and a really nice little four cylinder as well. Bet it sounds good.

I'd run it further to see if it's going to play around any more if you can, it may have just been a bit crappy/gummy in float bowls possibly if it's sat around for awhile.

Hopefully you get to enjoy it without further hiccups.


Offline Moorey

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Re: Honda 1992 CB400SF
« Reply #2 on: September 24, 2018, 09:19:32 PM »
Its done nothing hardly over the last few years. I will take it out tomorrow and put a few more miles on it. I have never been a noisy road bike fan but it is quite addictive, does sound good and turns a few heads. Redline starts at 12500rpm and its howling then. It needs chopping and altering as I don't like the way the can is mounted.   ;)

Offline rozabikes

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Re: Honda 1992 CB400SF
« Reply #3 on: September 24, 2018, 10:24:55 PM »
Love it. If my legs were not so crap recon I would have one in the garage myself.
One day I'll have the time to restore it, not just talk and dream....

Offline philward

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Re: Honda 1992 CB400SF
« Reply #4 on: September 24, 2018, 10:32:37 PM »
I've toyed with the idea of getting one myself (but struggle to ride what I have!) Lovely bike though
Current Bikes:-
Kawasaki ZZR1100D3
Honda CB750K2
Honda CR750 Replica
Honda CB750K6 Cafe Racer Project
Kawasaki ZZR250 (1990)

Offline Moorey

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Re: Honda 1992 CB400SF
« Reply #5 on: September 25, 2018, 09:56:31 PM »
Bit of a update. Its been fine just normal riding about until this afternoon when I went to see what it would do. I got up to 120mph on the clock pulling just over 12000rpm in top gear. The run is downhill, and it cut out at the end of the run. I got it running and went for a second top speed run with exactly the same result. Got it home and I have now removed the diaphragm valve and made a blanking plate and blanked the vac pipe take off. See what happens now. Trouble is I am going away tomorrow and don't know whether to take it with us or to take the 750.

Offline Moorey

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Re: Honda 1992 CB400SF
« Reply #6 on: October 25, 2018, 08:10:34 PM »
I have since fit a complete new tap from China for the princely sum of £10.99 and have done nearly 400kms and now runs fine. It has a MPH clock face on but the odometer racks up kms. I thought I was get a lot to a tank of fuel.  ;)

Offline Oddjob

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Re: Honda 1992 CB400SF
« Reply #7 on: October 25, 2018, 08:24:03 PM »
Is that a normal paint scheme or has someone copied the CBX1000 paintwork?

Hunts did a few CB1300 in CBX colours a few years ago, my mate has one done in the silver colour. Really suits the 1300.
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Offline Moorey

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Re: Honda 1992 CB400SF
« Reply #8 on: October 25, 2018, 09:36:19 PM »
No not standard, but looks like its meant to be CBX  copy obviously left off the X  It would be interesting to put them side by side for colour match. It doesn't look like it was done that long ago and is quite a good paint job. I think it suits.

Offline Oddjob

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Re: Honda 1992 CB400SF
« Reply #9 on: October 26, 2018, 04:27:07 PM »
Here's a picture of what I think is one of the Hunts copies, done by Dream Machine in Derby.





Yours seems to be missing one of the stripes in comparison. No my mistake, they are both there but the stripes seem thinner so harder to spot.

Nope wrong again, yours look to be orange/red whilst the CBX was orange/gold by the look of it.
« Last Edit: October 26, 2018, 04:30:38 PM by Oddjob »
Don't play stupid with me, I'm better at it

Offline Moorey

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Re: Honda 1992 CB400SF
« Reply #10 on: October 26, 2018, 04:47:35 PM »
Yes it def a lookee likee . Mine just has CB on the tank by the filler and no black stripe on the front mudguard.