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Topics - rbt1548

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1
Desperately Seeking!! / Honda CB250 or CB360 G5 Wanted
« on: March 24, 2024, 08:38:58 PM »
Hi,
I am looking for a CB250 or CB360 G5, if anyone has one or knows of one for sale please get in touch.

Thank You
Robert

2
CB350/400 / Rear Brake Torque Arm Washers
« on: June 02, 2023, 02:47:16 PM »
I was having a general look about in an illustrated parts catalogue and I came across a picture of the Rear Torque Arm and I noticed that parts 676 & 667, (in pic), are noted as 10mm spring washer & 12mm spring washer respectively, on checking mine the two washers are just plain washers, possibly changed by a previous owner, the one at the brake plate end is fine with a thick rubber washer and a plain washer the same dia. as the rubber one.

Could someone please tell me if they both should be spring washers? and if possible how tight the nuts on both ends of the torque arm should be?
It is no problem for me to change to spring washers as I have 10's & 12's.

Thanks.


3
CB350/400 / Clutch Enquiry
« on: February 06, 2023, 05:14:39 PM »
While my tank and panels were away getting painted I took the opportunity to spruce up bits of the bike including giving the crankcase covers a repaint.

Before I took the clutch cover off to paint it, to make things easier when replacing, I measured the handlebar lever free play and the distance from the top of the adjuster on the clutch cover to the cover itself, I also removed the actuating arm housed in the triangular housing. I fitted all the covers back on today and set the measurements as they were .
However, when actuating the handlebar clutch lever after putting the bike into first or second gear, (without the engine running), the rear wheel will not turn, indicating to me that the clutch is not disengaging, I then tried readjusting from scratch just in case I had got the measurments wrong, but I am still getting the same problem.

 The only parts of the clutch mechanism that were dismantled were the cable adjusters and the small arm in the housing, and I am pretty confident the adjuster screw in the arm is set properly to "feel resistance and 1/4-1/2 turn back off". I am wondering if the plates are sticking as it hasn't been started for approx 6 months due to me sorting things out on it. I tried kicking over the bike and spinning it over on the starter motor with the bar clutch lever pulled in to see if would make a difference in case the plates were sticking, but it is just the same, I don't have fuel in the tank at the moment to try it on a running engine which may indeed have the speed to separate the plates if they are sticking.

Could sticking plates due to inactivity be the problem? or could it be something else be the issue?, remembering I did not touch the clutch basket itself just the outer cover.

Any help much appreciated.
Cheers

4
CB350/400 / Rear Brake Actuating Arm
« on: December 07, 2022, 10:05:22 AM »
I am going through my, new to me, 400/4 piece by piece, last night, on checking the rear brake, I found the pedal wasn't returning properly, slightly binding, without me lifting it. I disconnected the actuating rod to try and find out exactly where the problem lay, and it's not with the brake pedal but the brake cam spindle in the rear brake plate sticking which I am just about to  remove, clean and re lubricate.
I had a read last night to see if there was anything specific I should know before I did it and everything looked staightforward, and there's even 2 dots to line up to make it even easier to put together again, brilliant, good old Honda!, I then whipped off the actuating arm ready to start, checked the splines on the arm only to discover no dot on the arm, had I known there was no dot on the arm I would have marked it with a bit of paint, that'll teach me to take something as Gospel.
Anyway, having re adjusted a number of drum brakes over the years I thought I would put it back on it's splines so that on full braking the position of the arm would be directly straight down, (90 deg), or just before the 90, does that seem about right?

I also found this picture in the service manual which shows the pedal clamp gap lined up with the arrow on the wear indicator, would the concensus be maybe that would be the better way to go?

Thanks


5
CB350/400 / Simple Paint Question
« on: October 21, 2022, 05:11:27 PM »
As the title says, "Simple Paint Question " from a simple man!

As my tank and panels are away to get spruced up I am going to smarten up the engine and crankcase covers. I have looked through the forum and noticed that the general consensus for engine paint is Simonize VHT31D, which I am going to use, however, is it the Matt paint or the Gloss paint?, it's hard to tell what's on just now as looks like a satinish finish.

I would rather ask the simple question than make a howling mess of it.

Cheers

6
CB350/400 / Carb Leak, Simple Fix, but Long Time Finding Fault!!!
« on: October 05, 2022, 06:00:52 PM »
 I normally turn of the petrol tap on my bike, (recently acquired CB400/4), if I am not going to be using it but I forgot to do it and came into the garage a couple of days later to find 2 carbs dripping petrol onto the floor, not a lot but enough to let me know there was a leak, they were No. 1&3. I thought starting the bike and letting it run for a few minutes would sort it and it did for No.3, not so No.1, so off with the float bowl, valve seat and float valve, quick clean and polish and back on, still leaking!

As I didn't know the history of the bike, and going by a couple of things I found previously, I thought it may be best to remove the carbs and give them all a good check over and clean, which I did, and re set the float heights to 21mm. rather than fit it all to the bike then discover I still had the leak, I connected them to the tank whilst on the bench, No.1 leaking again!!! Now at this point I decided to order some float valve seats and valves, my thinking being, the ones that have been in, as far as I know, have been there for over 40 years and may be the problem. I then changed the seat and valve in No.1, (can use the others as spares, should I need to), and reset the float height, still leaking!!!!  I don't mind working away at stuff but those of you who have done it will know that on the bench the carbs as a unit are a bugger to drain and move without petrol going everywhere, and each bowl is on with 4 screws unlike my CB750 which had a clip holding it on.

What next to check?, I swapped the float and valve bits from No.4 that wasn't leaking and checked the float height settings, off we go again, petrol on and leaking on No1, no leak on No.4!!!,
This was doing my head in and I am trying to think the big chap upstairs has it in for me, but it's a while since I tried to play a Led Zeppelin album in reverse  ;), so hopefully I'm ok on that front.

Now where does all the swapping parts, putting new and other parts back on, marking down what I have moved and rebuilding leave me?, exactly where I started. I then thought the only thing I hadn't looked at was the bowl itself , what's in the bowl?, basically a brass overflow tube shrunk into the body of the bowl, so I thought I wonder if there is a hole in it? something in the back of my mind was saying I may have read about that somewhere.
I then connected up the rubber overflow pipe to the tank, put my finger over the hole in the brass tube, turned on the petrol and it all came pouring out of the joint where the tube was shrunk into the float bowl, at last I found the problem!, I tried the other bowls and they were all fine.

I have used Chemical Steel to try and seal it, if it doesn't work at least I know where the problem lies and I can try and source a new bowl.

I am now going for a lie down with the temptation to look out my Led Zeppelin 4, but play it the correct way just in case, before I try and find a good painter as I would like my tank and panels done.

7
I am looking for the grab handle that fits on the rear of the bike and bolts between the rear shocker and frame, one would do but two would be better as it would balance up the rear.

Also a set of Engine bars and a luggage rack.

Thanks

8
Desperately Seeking!! / CB 250 or CB350 Wanted
« on: July 02, 2022, 08:24:15 PM »
No Longer required, Thanks to all!

Hi,
I am looking to buy a CB250 or CB350 as I would like to onto something a bit lighter.

Preferably any of the K models or a G5.

There will be no messing about from me,  if the right bike was to come along I would try and conclude the negotiations quickly and simply.

Thanks
Robert

9
CB750 / Differing Exhausts
« on: December 17, 2021, 10:48:00 AM »
I have been plodding through my newly acquired K5, tidying up and sorting bits here and there as required, there are a few bits needing fettled as it original, wheel rims looking a bit forlorn with chips and thinning chrome. I had a look at the exhaust system  and noticed the both the right side are HM341's but both the left are HM300's.

 With the bike being over 40 years old there have probably been various changes to it by previous owners and why the HM300's were fitted we will never know, there could be lots of reasons.

The bike starts easily and runs nicely through the rev range the way it is, would the differing exhausts make a great deal of difference to the running of the bike in the long term?, if so what would be my options?

The K5 is basically my first 4 cylinder bike in 46 years of having bikes, mostly twins, (although I did get a CB550 which was certainly not as described and was sold within a week without me even riding it), so I am learning about the 4's as I go.
I have restored a number over the years from a Guzzi 1000S to my BSA Lightning Clubman , which I have just sold after 21 years of ownership. I don't have a problem working on the bike but as I mentioned 4s are new to me and I would rather ask a question than horse on and make a mess of something.

I appreciate any advice given regarding the different pipes.

Cheers

10
CB750 / Oil Pressure Switch Query
« on: November 29, 2021, 07:18:15 PM »
I am looking for a bit of advice please.

I am doing a bit of cleaning and fettling on a recently acquired Cb750K5, I turned it on without starting it the other day and noticed the oil light didn't come on, previously it had came on with the ignition switch.

I checked the bulb, ok, then disconnected the wire from the switch, and checked for continuity from the wire switch end to the bulb holder, again ok. I removed the switch gave it a good clean out and wired it with a test light and using a air compressor gave it a few blasts, every time the air went in the light went out which indicated to me that the switch was working; anyway I put it all back together again and it now seems to be working, quite possibly just some crud in the switch or maybe the connection was not too good previously.
However, just in case it isn't going to last I would like to buy a new one to have as a spare, I got the part number, 37240-P13-013, and looked it up, over £50 which took the wind out of my sails a bit, especially after I bought one for my now sold Guzzi 1000S for £10.

On the CMSNL site, when you click on the part it gives you a list of vehicles that that part number and part would fit, and, along with a large  number of Honda bikes it also fits Honda Accords. I know some car pressure switches can actuate at lower pressures but I was wondering, if the part number was the same surely the actuating pressures would be the same?
 Typing in the part number for Oil Pressure Switches for  Accords brings up a number of items for about £10, which is a lot better than £50 if I wasn't going to need it and it was just going to lie in a drawer.

Any views on getting the part for an Accord, as I mentioned the Honda part numbers are the same, so surely the operating pressure would be too?

Thanks

11
CB750 / Engine Durability
« on: June 30, 2013, 04:01:29 PM »
Hi, I have been offered a 1976 K6, which has had only 2 owners, looks in  good condition, nicely aged with a wee bit of wear at the rear of the tank where knees have worn the stripes.
As I'm not that knowledgeable of the SOHC 4 engine I was hoping someone could tell me if an engine with 57,000 miles may soon require attention, or can they go on for a good mileage after that?
I know the mileage can be relative to the treatment that an engine has had, services , general abuse etc., so any general opinions would be helpful.
I have rebuilt a number of bikes/engines over the years and I have a fairly well appointed workshop, so it wouldn't faze me having to do some work but I'd rather not have to do major things as I've got to a point where I'd rather just be riding than having to go though the process of rebuilding another one.

All opinions welcome.
Cheers

12
CB750 / Rear Light Style Advice
« on: June 21, 2013, 08:04:28 AM »
Hi I am going to look at a 1970 CB750 K0, UK bike, quite close to me, I have only seen a picture so far and was not sure if it had the correct style of rear light and bracket for that model as I have seen some pics on the internet with 2 differing styles.
Are they both correct but for different markets?

The one on the bike in the advert has a black bracket ,similar to the one in the picture which has a support piece going towards the seat direction, basically shaped like an inverted "L", it has a rectangular rear lens with straight ends, is the bracket correct for year, should it be chrome, and is the lens correct?, I have also seen a pic with a lens that is rectangular but has rounded ends.


The other one I have seen is chrome with just a vertical arm, like pic below, this one seems to be more widely fitted.


Any help appreciated ,
Thanks

13
CB500/550 / Vin Plate
« on: November 19, 2012, 08:42:20 AM »
Hi all, I have just acquired my 1979 CB550 F2, and, like most new owners have a couple of questions if you don't mind.

One of the previous owners has had the frame powder coated, but either through laziness or incompetence did not bother to take the VIN plate off and it has also been coated, so I am on the look out for a VIN plate. There are various ones on the 'net but I do not know what info is on it as I cannot find a clear picture of one. I would be grateful if someone could either direct me to a picture of one or maybe take a picture of theirs. I understand some people would not want to show their frame numbers, so even one with the frame number blanked out would do , it's just to give me an idea of what I am looking for to enable me to get another one.

I also acquired a full original exhaust system and silencer with the bike, while the silencer is solid and the chrome excellent, the No. 1 pipe, has a bit of a tear in it from the head joint end, it's about 3"- 4" long, dear knows how it happened as it is a tear rather than having been down the road as there are NO scratches or road rash on it, (I am a Road Traffic Collision Instructor, part of that is wreckage reading, and there are no rash signs at all!)... strange!  As I would like an original system I was thinking of getting it cut out and a steel patch put in and rechromed, does anyone know of a company who would do the repair? I had it done to my BSA years ago but I can't remember who did it.

I'm sure I'll have a few more questions before I finish, but any help would be gratefully received.

Thanks

14
New Member Introductions / Hello
« on: November 19, 2012, 08:15:23 AM »
Hi,  a quick hello as I have just joined the forum having bought a  Cb550 F2. It was registered in 1979 but I'd imagine it's a '77 bike. The bike was described as  in excellent condition by it's previous owner, however on closer inspection, our descriptions must differ greatly, quite a lot requiring doing!

It has come with a motad exhaust system on the bike but I did manage to get from him a full original system with the silencer totally solid although No.1 pipe has been hit by something and torn between the head joint end and about 3", there are no scratches/ road rash on the pipe so it's not been down the road, I'll look into getting a repair and rechrome.

I have a couple of  other bikes a Guzzi 1000s and a 1965 BSA Lightning Clubman.

Although having numerous bikes over the years I have never had a four cylinder engine, this may prove to be fun!!!, always thinking that a twin was enough to be contending with for working on, (although I did have a Thunderbird Sport), my vacumn gauges are just a pair so maybe need to get a four set.

So here's hoping the ownership will be enjoyable, now onto the CB550 forum with some questions.

Chere
Robert

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