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Messages - Erny

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391
CB750 / Re: Electrical question
« on: June 28, 2019, 07:17:50 PM »
I personally prefer other flasher that is independent from load.
Benefit is that you save energy.. Maybe not important for Monster but for old CB it makes some difference in case od LED bulbs 2x few watts instead of 2x21W

392
CB500/550 / Re: 550K1 - carb questions (022A)
« on: June 28, 2019, 02:15:25 PM »
Yes I know about prcedure to tune slow. Despite I'm now quite skeptic, I'll try to still play with air screws hoping for improvement

393
CB350/400 / Re: Speedo inaccurate
« on: June 28, 2019, 06:23:58 AM »
Normally, calibration is done on the bench - usually it should be 1000revs of cable = 60kmh. At least this is for bikes and cars I've been working on in the past.
But this assumes tyre is according to original spec. If you know original and new circumference, you can get difference and calibrate on the bench accordingly. But still the biggest difficulty is opening and then proper closing of gauge body

394
CB500/550 / Re: 550K1 - carb questions (022A)
« on: June 27, 2019, 06:45:53 PM »
Currently no1 and 4 are 1.5 turn, 2 is 1.75 and 3 is around 1.6. I did that based on plugs colour, where 2 was darkest, 3 was bit dark, 1 and 4 I considered ok.
Attached how plugs looked like on Mon after I had all screws 1.5 turn and before longer riding (after that I found no3 bit too dark too) and before syncing carbs. I don't jave actual view, will take pic once I'll be back at garage.

395
CB500/550 / Re: 550K1 - carb questions (022A)
« on: June 27, 2019, 09:31:31 AM »
Small update after yesterday carb sync (only #2 was out of sync):
- it now idles very nice when warm (sync definitely helped)
- start is OK somehow - after discussion here I consider it this way as OK and normal :)

However - under 3k RPM, using little trottle (typical when moving within city traffic), is NOT good.. Over ~3k it improves but still not perfect smooth and over 5-6K is really good.
When I try to use choke partially (under 3k RPM) it is significantly worse.
=> I have feeling that it is caused by too rich mix on low rpms.

One additional observation, when idling for few seconds and I'm twisting trottle quickly (I do not release immediately), engine kills. Is that normal?

Note:
What else I can try? I believe that playing with needles does not help as issue is on low rpm or I'm wrong?


396
CB350/400 / Re: Speedo inaccurate
« on: June 27, 2019, 09:09:49 AM »
They are made to read high otherwise the manufacturer could be held libel in some accident or speeding cases . It's the manufacturers safety margin.  Tyre size and wear also effects speedo accuracy. GPS ones are more accurate but then can be out when it come to taking bends and hills into account and need a clear view of satellites .

+1

this is standard rule, all bikes, cars etc have to show higher speed than real one due to above reasons, provided bike is fully up to stock specs incl. tyres (that is hardly possible today due to different tyres profiles).
I'm doing calibration by GPS and then stick small piece of highly visible red sticker on the clock to mark important limits - here in Slovakia 50, 90 and 130 kmh. As I have 550 and 750 with mph clock, it is even more important for me  :D
The rest I don't care much  ;)



397
CB500/550 / Re: 550K1 - carb questions (022A)
« on: June 25, 2019, 06:07:25 PM »
You would be welcome to come! Anytime!

398
CB500/550 / Re: Brake Disc
« on: June 25, 2019, 03:21:45 PM »
I would first try genuine Honda before changing disc.
In may case it was big difference

399
CB500/550 / Re: 550K1 - carb questions (022A)
« on: June 25, 2019, 12:16:50 PM »
SK = Slovakia (Slovak Republic), Bratislava, Europe  8)

400
CB500/550 / Re: Brake Disc
« on: June 25, 2019, 10:18:17 AM »
Before you change disc - what pads do you use?
I have the much better braking results with genuine Honda ones (compare to semi-organic from EBC) combined with modern braided hoses.

401
CB500/550 / Re: 550K1 - carb questions (022A)
« on: June 25, 2019, 10:16:04 AM »
This is interesting, never heard about this ingition system!

Just wonder what is its reliability, because, still you can easily fix issues in legacy ignition. Of course, Dyna S brings electronics too (in fact replacing whole points plate and cam, but keeping advancer) but coils are still legacy.

I'll contact Boyer for some details ;)

402
Depends what you prefer, what usege you plan..

I have now both, 750 K7 and 550 K1, both USA models. These I can compare

Obviously, 750 pulls stronger but 550 is much ligher, much easier to handle on the road, when moving in garage.
For riding in 2, I recommend 75, for city riding definitely 500/550

That's my view as per my experience

403
CB500/550 / Re: 550K1 - carb questions (022A)
« on: June 24, 2019, 11:14:37 PM »
Small update, I'm just back from garage.

I did start the bike ususal way (w/o choke), after warm-up I was checking ingition, found stripped screw on 1-4 points  >:(, after fixing it, static settings and settings with strobe light I went for test ride. Bike generally pulls good, was able to rech pretty 90mph (reading on tacho gauge).
Mix screw set to 1 3/4 turns out (looked to me the best) on all, did not manage to make my RPM meter meauring reliably so did not played with each carb separately.

Another observation linked to carbs - after engine fully warmed-up, when idling stable for several seconds, I tried to quickly twist the trottle and engine dies! Is that normal? I manage to reproduce anytime... slower twisting is OK...

Note: after spending quite some time with points ( >:( >:( >:() where one is obviously replica, and still having strobe flashing irregularly, fire mark moving left-right, I'm strongly thinking about Dyna S. I installed it to my friend recently and it was really perfect...uncomparable with points. New points set cost ~100 USD, new Dyna S about 160..

404
CB500/550 / Re: 550K1 - carb questions (022A)
« on: June 24, 2019, 11:36:04 AM »
This is obvious  ;D
My only pb is cold start on choke and idling till engine is warmed-up

405
CB500/550 / Re: 550K1 - carb questions (022A)
« on: June 24, 2019, 11:24:14 AM »
OK, now it is clear.
So I still have some issue to fix  :'(

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