Author Topic: CB500K1 Cafe to Stock (well more or less!) (Read 12507 times)

AndyH · « **Reply #25 on:** September 14, 2017, 01:34:03 AM »

While setting up a float bowl swap between #1 and #2 carbs to isolate an annoying leak in #2, I took the LHS crankcase cover off to more easily remove the bowls (clutch cable in the way).

Pleasingly, there's no sign of any oil leaks from the various seals, and the clutch push rod is still in one piece!

I also took the opportunity to give the neutral switch components a clean up, as I was experiencing the odd time when the indicator didn't indicate when in neutral!

Now to wait to see if the overflow leak problem has swapped to #1 carb, stayed on #2 carb or gone away.

AndyH · « **Reply #26 on:** September 15, 2017, 02:24:48 AM »

Well, #2 still leaked. See my other thread for further details.

AndyH · « **Reply #27 on:** September 16, 2017, 02:18:33 AM »

Took the bike for a blat this arvo after tweaking the timing on the Dyna S. Went like a shower of ****!!

Waiting now for the paint job on the side covers to be done. Tappet check/adjust tomorrow and carb sync a bit further down the track. Even furtherer down the track, new or cad-plated existing spokes and a cleanup of both rims, hubs etc.

AndyH · « **Reply #28 on:** September 18, 2017, 01:17:55 AM »

I received the replacement (read "correct") tacho from Bryanj today and checked its operation...all good!
Now in the process of refurbishing before mounting it permanently.
Also did a check of the charging circuit. Voltage at 3000rpm and above was a bit low so tweaked the regulator voltage adjust screw, now seeing ~14.5v as per shop manual.
Waiting now for the paintjob completion on the side covers.
Also received a carb repair kit from cruzinimage_au.

AndyH · « **Reply #29 on:** September 18, 2017, 02:42:49 AM »

Quote from: calj737 on September 18, 2017, 02:40:36 AM

Quote from: Himble on September 18, 2017, 01:17:55 AM
Also received a carb repair kit from cruzinimage_au.
Don't use the "hard parts" only the O-rings and gaskets. Whenever possible stick with stock jets, needles and float valves.

That was my plan Cal but it seems the carbs already have non-OEM hard parts, if carb #1 is anything to go by.

AndyH · « **Reply #30 on:** September 18, 2017, 03:11:18 AM »

Quote from: calj737 on September 18, 2017, 02:50:37 AM

In your signature...

1972 CB500 Four K1 (AUS version)
Previously owned..and thoroughly miskept

FTFY

So true!

AndyH · « **Reply #31 on:** September 27, 2017, 03:42:56 AM »

My sidecovers should be ready for pickup at the end of this week!

Also have a sync kit on its way. The leaking carbs (overflow after a day or 3) are still unresolved as #3 dumped today.

Anyway, I'll sync the carbs and at a later date pull the carbs if the o/flow issue with petcock ON still occurs.

AndyH · « **Reply #32 on:** October 02, 2017, 03:03:31 AM »

The carb sync gauges arrived today. Being relatively cheap I didn't expect "professional" quality and I didn't get it!

The needles at rest were all in different spots so I figured there must be a way to make them all the same. The "way" was to ease off the front faces of each gauge and "reset" the needles to the proper spot. This done, I then set up my trusty old vacuum cleaner to provide a pretty constant vacuum for the 5mm hoses. Fortunately, all 4 gauges read within a gnat's c0ck of each other!

Unexpected roadblocks notwithstanding, I'll do the sync tomorrow.

Long story short, the original side covers are now being replaced with a set from Joe (www.fb-stuff.com) which I ordered over the w/end here, so hopefully will see them in the next couple of weeks.

AndyH · « **Reply #33 on:** October 05, 2017, 02:28:41 AM »

Still wasn't happy with the gauges, so borrowed my mate's Motion Pro Synchroniser to confirm what the gauges were saying.

It was interesting to watch the interaction between the carbs as adjustments were made. I was able to get all 4 carbs pretty well exactly the same and also confirm that the gauges were close, but not quite as accurate. I believe this type of comparison has been discussed elsewhere but it's nice to see it in the real world!

I still have this current problem though, if I restart the bike after 15min/30mins/1hr/6hrs etc. it stumbles and farts and sounds like at least one cylinder is not firing properly, if at all

. It's very hard to get running 1st off.
But once it “clears its throat” it idles quite well and seems to accelerate without coughs or splutters. Blipping the throttle, it comes back to idle without drama.

This lack of normal start has only occurred since I put some Nulon (Aussie stuff) carb cleaner in the tank, hoping at the time it may have cleared the problem with the overflow on #2 carb. In fact #3 has started o/flowing as well!

I have new hoses from the tank to the carbs, but maybe the small hoses that interconnect 1 to 2, and 3 to 4 have reacted to the carb cleaner and particles from them are now clogging the float needle(s) and maybe the slow jets ……either that or crud that has existed in the carbs before “dosing”. In any case, a complete carb refurb seems to me to be the best approach now.
Sound like a good idea?

Cheers, Andy (aka Himble)

AndyH · « **Reply #34 on:** October 05, 2017, 05:17:26 PM »

Did a CT test 2 or 3 weeks ago Cal. Carbs 1,3 and 4 were ~2mm below seam, carb 2 was ~6mm. It was the only one overflowing at the time.

As carb 3 is now overflowing, I'll do another CT test on all and report back next hour or two (having breakfast now!).

AndyH · « **Reply #35 on:** October 06, 2017, 01:20:01 AM »

Definitely some crudge hanging around in the carbs. Drained all 4 and some varnish type bits showing up.
Time to pull the rack and give them a good going over!

AndyH · « **Reply #36 on:** October 06, 2017, 02:00:32 AM »

Quote from: calj737 on October 06, 2017, 01:48:35 AM

You might pause and check your fuel tank thoroughly. And do clean up the petcock too. Make sure the internal fuel filter is in place inside the tank.

Did that this afternoon Cal. A very small amount of junk was caught by the filter. The varnish bits found in draining the carbs would not have passed thru the petcock filter.

AndyH · « **Reply #37 on:** October 10, 2017, 02:57:26 AM »

OK, carbs have been removed, de-racked, disassembled, cleaned, refurbished, reassembled, re-racked and now on the bench for some checks before returning to the bike.
All is good….so far!

AndyH · « **Reply #38 on:** October 11, 2017, 02:34:40 AM »

Carb sync....almost there!

AndyH · « **Reply #39 on:** October 12, 2017, 06:58:30 PM »

Bike is running nicely now, and today I received the side covers from Joe!

Once they're painted and the emblems fitted, that will be "practical completion".

Season #2 will commence after "Down Under" Summer!

AndyH · « **Reply #40 on:** October 16, 2017, 02:53:02 AM »

Side covers in with the painter today. Should get them back at the end of the week.

This is how the bike looks now, sans side covers.

SOHC4 Cafe Racer Fan · « **Reply #41 on:** October 16, 2017, 07:42:54 AM »

Beautiful bike.

AndyH · « **Reply #42 on:** October 29, 2017, 10:21:37 PM »

After returning the carbs to the bike and performing a vacuum sync (carbs were very close with the bench sync) this project is now essentially complete!

The bike runs well at all throttle settings and returns to the same 1000rpm idle spot. At some stage I may contemplate a 4 into 4 exhaust but for the time being I'm happy!

SOHC4 Cafe Racer Fan · « **Reply #43 on:** October 30, 2017, 08:13:52 AM »

Way to go. The bike is a looker.

AndyH · « **Reply #44 on:** October 30, 2017, 09:00:13 PM »

Thanks Don!

SOHC4 Cafe Racer Fan · « **Reply #45 on:** January 02, 2018, 02:52:28 PM »

Congratulations, Andy. Your bike has been nominated for Bike of the Month February 2018. To be eligible for voting, please go to the nomination thread and post that you "accept" the nomination. http://forums.sohc4.net/index.php/topic,169960.0.html

AndyH · « **Reply #46 on:** January 06, 2018, 02:39:09 AM »

Wow, awesome! Just to be nominated is a real thrill, thanks Don!

The bike has now become an almost daily rider....I can't sit and look at it in the shed, it has to come out and breathe some air!!

I was considering moving it on to buy another SOHC but I've kinda fallen in love with the thing! So it stays, and I'll continue to enjoy the sweet little bike!

trigger · « **Reply #47 on:** January 06, 2018, 02:55:39 PM »

Looks great Andy, not sure what the 500 in OZ is down as in the parts book. Maybe DR,CMSNL, DSS have to check on Honda 4 fun site

AndyH · « **Reply #48 on:** January 09, 2018, 01:59:35 AM »

Quote from: trigger on January 06, 2018, 02:55:39 PM

Looks great Andy, not sure what the 500 in OZ is down as in the parts book. Maybe DR,CMSNL, DSS have to check on Honda 4 fun site

Have to admit I'm not 100% sure either Graham! $:-\$
I've been using this DSS parts list in combination with this General Export Model list from CMSNL. Seems to have worked pretty well but I have a feeling that a couple of "cosmetic" things on my bike may lend themselves more to either the UK or USA.
I reckon BryanJ and one or 2 Aussie CB500 punters might have a better idea than me!

trigger · « **Reply #49 on:** January 10, 2018, 01:27:13 PM »

Quote from: AndyH on January 09, 2018, 01:59:35 AM

Quote from: trigger on January 06, 2018, 02:55:39 PM
Looks great Andy, not sure what the 500 in OZ is down as in the parts book. Maybe DR,CMSNL, DSS have to check on Honda 4 fun site

Have to admit I'm not 100% sure either Graham! $:-\$
I've been using this DSS parts list in combination with this General Export Model list from CMSNL. Seems to have worked pretty well but I have a feeling that a couple of "cosmetic" things on my bike may lend themselves more to either the UK or USA.
I reckon BryanJ and one or 2 Aussie CB500 punters might have a better idea than me!

It is a Honda mate, enjoy it

At least you have better weather than what we have in the UK

And I still have to wait at least 3 months to see any kind of good biking weather

News:

Author Topic: CB500K1 Cafe to Stock (well more or less!) (Read 12507 times)