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Messages - billdn

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1
CB350/400 / Re: Any experience with vans to carry two Motos?
« on: September 14, 2023, 02:32:44 PM »
Someone I know hires a van one way to Liverpool with bikes on board, unloads at Liverpool,  rides to ferry and does reverse on return . Not sure if any cheaper though !

2
CB350/400 / Re: Still carb troubles
« on: September 05, 2023, 07:12:28 PM »
If you want another "pair of eyes" to help out with it Bill, I could have a day walkabout to see if we can get our heads around it together.

Which area are you located in West Sussex ?

Offer on the table should you need it.
Cheers gave sent you PM 👍

3
CB350/400 / Re: Still carb troubles
« on: September 05, 2023, 07:10:53 PM »
No don't have one, probably could borrow one. The engine has  been rebuilt from bottom up, rebore, new pistons,  rings, timing chain, primary chain, valves etc surely shouldn't  be compression problem.
You've far more experience than me so not saying your wrong, if so what's caused/causing it?
Before I switched to the Boyer I did get a good balance onbtge carbs but still wouldn't shut down when approaching giveaways etc.
Took them off, bench sync again , refitted added Boyer and now still same problem. Driving me 🤪. 

4
CB350/400 / Re: Still carb troubles
« on: September 05, 2023, 03:53:00 PM »
Just tried again,  wound #1 slider out a bit. Started but #1 bar doesn't even show on scale ,#2 rises a bit as adjusting the others. #3 bar shot to the top and #2 pipe popped off again with a distinctive pop sound but doesn't sound like a backfire. 3 and 4 nearly achieve adjustment but 2 and 1 not having it.

5
CB350/400 / Re: Still carb troubles
« on: September 05, 2023, 03:17:02 PM »
Very sorry to hear about the wife.

You could try this as to me it sounds as though the throttle lifters are set too high, especially if the carbs have been apart.

Get the adjuster screws, the ones with the little 8mm headed nuts on and the flat bladed screwdriver slot. Screw them all down as far as they can go. You may now struggle to get the bike to tickover and starting will involve a little jiggling with the throttle. Once you get it started adjust the main tickover screw to see if it will idle. If so, now vac the carbs to equalise them.

See if that works.

Before you do that post a pic of the adjusters so we can see how high they are now.

Hi Oddjob,
Just tried above and got it sort of running with enough revs to attempt Carbtune. Oddly #2 tube to carbtune kept blowing off the adaptor.  It was helping and adjustment could be made but soon as pipe blew off engine stalled.
Looks like a bench sync coming up 😏. Also#1 exhaust pipe was nowhere near as hot as the other three, although still hot to a degree. And yes did check carbtune pipes were on correct carb 🤣

6
CB350/400 / Re: Still carb troubles
« on: September 05, 2023, 02:30:30 PM »
Thanks Ted but all of the above is correct,  original brass and kept circlip in correct position.  Hope by end of day will have tried screwing down slides and vac gauge 🤞

7
CB350/400 / Re: Still carb troubles
« on: September 05, 2023, 11:30:39 AM »
I will go back and check my 350F build thread when I get a chance. My carbs came ready built from Gerben in Holland and came with the quadrant problem. He sent me an email of how to rectify it so will look for that as well. Yes the quadrant is where the push and pull cables connect. Is your pull cable only just fitting or is there plenty of adjustment.

Sent from my Pixel 7 Pro using Tapatalk
Cables fine Roy, plenty of adjustment on both, which I think is good 😏

8
CB350/400 / Re: Still carb troubles
« on: September 05, 2023, 11:27:22 AM »
Very sorry to hear about the wife.

You could try this as to me it sounds as though the throttle lifters are set too high, especially if the carbs have been apart.

Get the adjuster screws, the ones with the little 8mm headed nuts on and the flat bladed screwdriver slot. Screw them all down as far as they can go. You may now struggle to get the bike to tickover and starting will involve a little jiggling with the throttle. Once you get it started adjust the main tickover screw to see if it will idle. If so, now vac the carbs to equalise them.

See if that works.

Before you do that post a pic of the adjusters so we can see how high they are now.

Pics of adjusters prior too screwing in , hopefully attached

9
CB350/400 / Re: Still carb troubles
« on: September 05, 2023, 10:15:10 AM »
Thanks all for the thoughts and support, it's been a rough road .
but inwards and onwards!
I'll try Ken's suggestion first and then if needs be, and fear it will , I'll take off the carbs, again and do yet another bench sync. The guy on the production line building the 400 must have loved his job of fitting the carbs !
Might be a day or two as got to help the oldies (parents) for a few days after today.
But as Arnie says "I'll be back"

10
CB350/400 / Re: Still carb troubles
« on: September 05, 2023, 09:41:08 AM »
Sorry for your loss Bill.

That sounds to me like the quadrant is not positioned correctly when it was reassembled. Got the tee shirt for that one, took me ages to find it but the symptoms were as described above. Repositioned things correctly and it was spot on. Unfortunately the old memory won't allow me to remember how I fixed it but someone will know.

Sent from my Pixel 7 Pro using Tapatalk

Thanks Roy,
Not sure what you mean by the quadrant ? Do you mean the part the the push/pull throttle cables connect to? not sure how that could be misaligned but every day is a school day with this.
Cheers
Bill

11
CB350/400 / Still carb troubles
« on: September 04, 2023, 06:15:31 PM »
Back in February I posted saying I think I'd sorted my troubles with carbs not shutting down . In April I went for a Boyer electronic ignition complete with micro coils and I still have the same problem with the carbs !
There's quite a long time between posts because my wife was very ill with lung cancer and sadly passed on 30th June , so shed time was the last thing on my mind!
However one of her last wishes was "Get that bl##dy bike sorted!"  So I'm now back in the mood to try and sort it.

From the top :-
Boyer fitted and bike starts/runs. Using a timing light its correct.
Tappets adjusted.
Have to fiddle with idle adjuster to set at 1200rpm .
Idle mixture screw set at 2 turns out.
Plugs very sooty
Open throttle and revs soar and doesn't drop back to 1200rpm when released. Have to fiddle with idle adjuster to bring back down.
Sprayed carb manifold connectors to barrels with Carb cleaner and no effect , so not drawing in air, better not they're new - good
Remove carb tops and sprayed carb cleaner in but slides don't appear to be sticking either.
I've noticed that if you press the top of brass hexagonal nut on the carbs this will reduce the revs but too hard and it stalls FWIW.
Prior all carbs stripped, ultrasonic cleaned, carb cleaner on jets with jet brushes etc etc retaining original brass and new seals from NJ.
Bench synced at least twice.
Standard air box and new air filter

I've no idea what to do next! I have an old lawn mower, never serviced, starts first time every spring,  think I'll put engine from that in instead.

To me it's pretty obviously  carb related, (I think  ::)) as there is good spark and timing is ok. Not got to the stage with setting Boyer to full advance  yet which requires 4500rpm as revs all over the place.
Cheers peeps! 8)

12
CB350/400 / Re: Front disc brake adjustment
« on: June 09, 2023, 07:51:58 PM »
Thanks Oddjob and Ted for advice. Been a while as other life stuff took over. But now resolved,  would have helped if I remembered the difference between "fixed" and "floating" pad.
Still won't forget that error in a hurry. Or "Doh" as Honer would say. 🙄

13
CB350/400 / Front disc brake adjustment
« on: May 10, 2023, 06:10:56 PM »
Where the old girl had been standing over winter, the disc brake had seized on. So drained fluid,  stripped,   cleaned calipers, fitted new pads c/w new washer behind floating pad, new fluid and bled satisfactorily.  However I can't adjust the gap between fixed pad and disc   no matter how much I twiddle it. With calipers off the brake arm moves freely and is not seized.
I've noticed the floating pad projects 5mm or so out of it's caliper, should it go fully home after using the brake? I renewed o ring in calipers and there appears to be no fluid bypassing the pad. I cleaned up the piston which was gunged wicked   , it looked OK? Can't work out what's going on 😤

14
CB350/400 / Re: Electronic ignition choices
« on: April 17, 2023, 06:41:15 PM »
You assemble the ht leads from kit supplied to your own 5k ohms resistor plugs and fit them to micro coils at the other end. Coil 1 has cylinder 1 and 4 and coil 2 has cylinder 2 and 3 much as regular coils. Just the circuitry is different. Cheers Ted

15
CB350/400 / Re: Electronic ignition choices
« on: April 17, 2023, 03:34:46 PM »
No idea Ted, came with the kit but do carry spark to ht leads then the plugs. All plugs spark but only 1 fires , or something like that.
Went for these as an ht lead on old coils was decidedly dodger and about to fall off.

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