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CB500K1. Cafe Racer to Original...sort of!
AndyH:
My sidecovers should be ready for pickup at the end of this week! ;D
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:
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! 8) 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:
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! :o
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 “dosingâ€. 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)
MarkCR750:
I think a carb strip down and clean/refurb sounds like a good idea Andy, at least it will rule out the carbs as the issue one way or the other, will you be sending them to a specialist or doing them yourself?
AndyH:
I'll do them myself Mark, with the assistance of my mate who has an ultrasonic cleaner.
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