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Messages - andy120t

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1
Out & About / Re: Calne Bike day
« on: July 29, 2022, 07:21:20 AM »
I passed to The IAM car test recently. It's well worth doing - I plan to move into the bike version next year.

2
Out & About / Out and about near Saumur
« on: July 29, 2022, 07:19:33 AM »
https://grandprixretro-puynotredame.com

Holidays with the family, nothing much to do but eat bread and cheese and read the local tourist-office offerings about yet another chateaux and then, at the bottom of the page and just ten miles away, the local 'classic grand prix'! I'm only free today which seems to be 'arrivals day' but it'll make a change from vineyards. Hopefully a few good pictures to follow.

The evening session tomorrow looks awesome, but we'll have moved on by then.

3
Other Bikes / Re: Wot, no OHC!
« on: July 10, 2022, 07:49:33 AM »
Very nice.!

4
Desperately Seeking!! / Re: CB550f2 carb return spring
« on: July 07, 2022, 07:56:43 AM »
I’m having problems with email, so I’ve pm’d again!

5
CB500/550 / Re: Minimal wiring to start up engine?
« on: July 06, 2022, 01:10:40 PM »
That's how my bike is wired. Initially it wouldn't start despite lots of kicking (in all senses!), although it was running on a quick-start spray so I was happy with my wiring. I whipped off the carbs to check they were clear and then another few minutes on the kick start and off it went. Clearly it's a lot easier letting the electric start do the work!

6
Desperately Seeking!! / Re: CB550f2 Airbox fittings
« on: July 06, 2022, 11:21:33 AM »
Great! I get the feeling that mine is all F2, including the manifold (which has the carb balancing holes) but with the PD's  stuck in the mid dle.

Final thing to check is the length of the rubber boits. Mine seem fairly short and are pictured below. Any idea how long the correct ones for PD carbs are?

7
Desperately Seeking!! / Re: CB550f2 carb return spring
« on: July 06, 2022, 08:13:54 AM »
Thanks - I've sent a pm with email details!

8
CB500/550 / Re: Minimal wiring to start up engine?
« on: July 06, 2022, 08:03:06 AM »
I second the point about 'if not using a switch  don't leave could permanently connected' ..it may be easier to have an on off switch, or I've used a blade fuse between battery positive and coils.

For really miminal set up, you can avoid the starter motor and just use the kick start. It might be a bit more effort to get started though.

9
Desperately Seeking!! / Re: CB550f2 carb return spring
« on: July 05, 2022, 10:19:13 AM »
Thanks all!  For a but more background, it's a bit of a bitsa, which makes it more challenging to identify what I need. Frame is a K3, but the swingarm doesn't have removable blocks so probably didn't come out of the factory connected to this frame. The 550 engine and carbs came together from a breaker - the frame they came out of had the RHS footpeg on the frame / above the footpeg so I think that is the F frame.

Inspired by posting this, as it helps give me a kick to find things, I sorted out another box of nuts bolts etc and found a spring that will do the job but the wire seems a little thinner than the original, so I'm not sure how long it will last. Bryan, if you do have anything that looks correct please let me know.

Interesting point on the carbs then is that when I bought new cables, I couldn't get the 'throttle close' cable to fit, so I currently only have the open cable fitted - but if PD carbs are incorrect for the bike then that may explain why the second cable is too short...  I hadn't considered that the carbs weren't correct for the engine but it's omething else to look into.

10
Desperately Seeking!! / Re: CB550f2 Airbox fittings
« on: July 05, 2022, 10:06:48 AM »
Is gold-plated an option?! Seriously though, the bike is a bitsa so I can make up some brackets until/unless some come along, but it would be nicer and easier to have the correct ones. On the plus side, I found some hollow bar and some spacers which are an exact fit for the crush tubes, so I can manage those here.

I'm on the PC now which makes viewing some of these diagrams slightly easier. (Tablets are great, but it's damned hard to view anything on them).

It looks then as if the brackets to mount the airfilter box are the same for both th F2 and the K3. Ken - if you do have any please let me know.

The same goes for the spring (which I can get at DS). The filter itself has different part numbers but DS shows the same filter for both bikes. I can't see any part numbers for the filter housing/box itself but they look the same.

I haven't yet pinned down which airbox (ie the bit that connects onto the carbs) I have. The diagram and linked picture of the F2 airbox on the CMSNL pages look very much like mine - however the K3 drawing also looks very similar, but sadly there isn't a piccie. Does anyone know if there is an obvious identifier?

Quite possible then that I have a mismatch of airbox and carbs to engines...be nice to pin it down!

11
Desperately Seeking!! / Re: CB550f2 carb return spring
« on: July 04, 2022, 07:54:00 PM »
The carbs I have are then the ones in the first of those links, with the spring as item 5 - so what I would call a normal spring, and not wrapped  around the shaft. I would fit any spring to it for now, as I'm just getting the engine running, but I don't have anything lying around that even begins to fit.


12
Desperately Seeking!! / Re: CB550f2 carb return spring
« on: July 04, 2022, 06:43:17 PM »
These things...they say PD on the side. And they say keihin ..

13
Desperately Seeking!! / CB550f2 carb return spring
« on: July 04, 2022, 04:41:24 PM »
Carbs are PD,a on a 550f2 engine. I'm missing the carb return spring which shuts the carbs when the throttle is released and wondering if anyone has a spare ( or anything vaguely similar..as all the old hardware sources I used to know have vanished). It's approx 80 mms long.

Picture below to show the type of spring it is.
It's part 5 on the parts diagram.
(I assume the taper makes it easier to hold open at lower revs).

Thanks for any help...I'm not sure my elastic band replacement will last much longer, but at least the postman keeps leaving me plenty on the drive.
Andy


14
Desperately Seeking!! / CB550f2 Airbox fittings
« on: July 04, 2022, 04:26:53 PM »
Hi,
I'm looking for a few fittings to help me mount the airbox.
Specifically, parts 15 and 3 - which are the angle brackets that attach the front of the airbox to the frame.

And 16, which is an oval washer with a raised bit that slots into the lower mounting hole.

I'm also missing parts 25, and 26 which are spacers to stop the box being crushed between the fittings and might be rattling around, unloved and unwanted, in the bottom of a spare bix.

Finally, part 5 which is a spring thingy that holds the air filter in place.

Any help gratefully appreciated!
Andy

15
Misc / Open / Airless tyres
« on: June 14, 2022, 08:08:29 AM »


My first big bicycle had airless tyres, but they were blocks of rubber rather than the level of tech. It's an interesting article, not something I was aware of, and would certainly save on flat tyre hassles as well as space in the car.

https://www.bbc.co.uk/news/business-61644033





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