Honda-SOHC

Hi

I finally got the registration for my CB550K3 (ex US import) and rode it out on the road for the first time today.

I did about 15 miles, generally the bike was ok, but the throttles seemed less responsive around the 3000rpm area, a bit hard to explain really. I did have the carbs balanced before the MOT and at low revs it seems fine. Anyone have any ideas how I can improve the responsiveness in this range.
Also after about 10 mile the front brake started squealing.

But I would like to thank everyone on the forum who has given me help and advice to get to this stage.

Many thanks
Dave

Hi

I have now got my CB550K3 MOT tested and I am trying to register it. The problem I have is the VIN says CB550K-xxxxxx, which is now on the MOT certificate,  the letter I have from Honda USA has a VIN of CB550-xxxxxxx so DVLA refuse to give me a registration.
I just spoke to Honda US to get a new first registration letter with the correct vin, they say the letter correct and the US systems show what is on the letter so won't issue a new one. They say CB550K is a vin from a different country but they don't know where.
Can anyone help, I can't find an email address for Honda UK or Japan.

I really don't know what to do now, any suggestions would be gratefully received. Anyone else bought a US import from DK motorcycles and had the same problem?

Many thanks
Dave

Hi
Anyone know anything about my old 550, it was registered in Tewkesbury Glos and I sold it in Bridgnorth Shropshire in mid 1981

I always wondered what happened to it.

Dave

Hi

I'm after a headlight/ kill switch assy for my cb550, but I think the 750 ones are the same.
Does anyone hove one they would like to sell?

Many thanks
Dave

Hi
I bought my 550k3 as a US import, I am now at the point where I want to get it mot tested, then I had a thought. Do I need to change the headlight, will the original US headlight throw the dipped beam to the right hand side of the road, or does it just shine straight ahead?
I did try turning the lights on against my garage door, its hard to tell but the beam pattern does seem to be straight ahead.

Also does anyone now the name/shade of black for 550k3, as I plan to get my tank resprayed?

Many thanks
Dave

Hi

I have a US import CB550K3 which has a set of pd46a carbs fitted, I'm having problems getting the bike to run correctly so I have taken the carbs off the bike again and I have removed the top covers and the float bowl covers. Looking at other posts on this forum I have noticed the standard Main jet size is 90 and the slow running jet is 38, my Main jets are 85 and my slow running jets are 42. Everything is clean and I have blown compressed air through all the internal channels, but before I reassemble them for another try on the bike could some kind soul answer the following for me please:

1) Are the different size jets for different climatic conditions, and should I change them to the standard sizes for running in the UK?
2) Are the Jet needle and the emulsion tube the same whatever the jet size?
3) Are the pilot jets (fuel/air mixture) the same size on all versions of the carbs, no matter what the other jet sizes?
4) If I do change the jets for standard sizes will I need to change the brass ferrel guide that is in the body of the carb that the jet needle goes through?
5) Is it possible to change the jet needles without disassembling the 4 carbs from the banking plate and having to disassemble the choke and throttle mechanism etc?


I have a copy of Brian Barnes How To document, are there any good guides around for these carbs that are worth a read?


Many thanks
Dave

Hi

I put my pd46a carbs back on my cb550k3 today and it started but I had the following problems:

1)  fuel was coming out of the air box drain between the carbs and the air filter housing. I took the air box off and restarted the bike and noticed fuel was leaking from no 3 carb air inlet stub.

2) when the bike started it revved to 3000rpm and stayed there, when I opened the throttle the bike just cut out.

Before putting the carbs back on the bike I replaced all the slow running jets, and cleaned the pilot jets and emulsion tubes. I cleaned the petrol/air screws and reset them to 2 turns out. I also air jetted all of the inside of the carbs including all of the channel ways, non appear to be blocked.

Would the float height being wrong cause fuel to come out of the air inlet, I must admit i would have expected the fuel to come out of the overflow tube rather than the inlet, I will check the overflow tube isn't blocked.

I turned the bike over with no carbs and there is suction on all four cylinders.

Anyone got any ideas what could be causing these problems?

Thanks
Dave

Hi

I got the carbs, air box, battery and petrol tank back on, but when turned the engine over it didn't fire up.
I checked the plugs, they were clean but dry, I took the carb bowl drain plugs out, and nothing came out.
I then took the petrol pipe off the carbs and petrol flowed. I have taken the carbs back out the bike and they are sat on the bench. The only other thing I tried was putting a length of new tubing on the carb petrol inlet nipple and tried gently blowing but it seems blocked.

Anyone got any good ideas before I start ripping the carbs to pieces?

Many thanks
Dave