Honda-SOHC

Other Stuff => Tricks & Tips => Topic started by: MrDavo on January 30, 2017, 12:21:04 PM

Title: Perfect Timing
Post by: MrDavo on January 30, 2017, 12:21:04 PM
Ive set my CB750 timing up static as per the owner's manual, no problem, and it starts and runs OK.

However looking at the Honda Service Bulletins etc its clear that the dealer was expected to use a strobe, with a dwell meter.
The gist is that you set the dwell instead of the points gap, as it is a more accurate measure of how long the points stay open, then set the timing to the marks (I hope I've understood this correctly).

I can get a Gunson Superstrobe on fleabay for about £50, any good? Worth the extra effort?

Title: Re: Perfect Timing
Post by: Trigger on January 30, 2017, 01:33:14 PM
You only need a cheap one, they all do the same job>>>http://www.ebay.co.uk/itm/Black-Friday-SALE-AccuSpark-S8000-Professional-Ignition-Timing-strobe-lamp-Light-/182364877110?hash=item2a75cb3136:g:G8QAAOSwbYZXc5hx
Title: Re: Perfect Timing
Post by: MrDavo on January 30, 2017, 01:49:58 PM
Much cheaper, but can I measure dwell with it?
Title: Re: Perfect Timing
Post by: Chris400F on January 30, 2017, 02:24:45 PM
Much cheaper, but can I measure dwell with it?
No, but don't think that you could measure dwell with the Gunson one either.
You could with this: http://www.ebay.co.uk/itm/Vintage-Gunsons-Sparktune-2-Dwell-voltage-test-meter-Classic-Car-Good-Condition-/152408947464?hash=item237c47fb08:g:03AAAOSwUKxYcjeE
Title: Re: Perfect Timing
Post by: Trigger on January 30, 2017, 03:21:33 PM
Strobe light is a strobe light, Dwell meter is a dwell meter.
Title: Re: Perfect Timing
Post by: Bryanj on January 30, 2017, 04:10:07 PM
The original manuals say use feelers and static timing, strobe is used only to check that the advancer is working correctly
Title: Re: Perfect Timing
Post by: K2-K6 on January 30, 2017, 05:11:18 PM
When servicing it would be much quicker for them to check dwell and timing without touching any setup, so all ok and leave alone.

If the points are set mechanically, then the dwell would usually be within range. It's the time the points are closed to allow coil saturation to occur.

Probably more useful on cars that have multiple peaks on the point's cam lobes as if there is a difference you'd get differing points gap depending or which one it's checked on. Dwell in that example would effectively aggregate the error to get a median points setup.
Title: Re: Perfect Timing
Post by: Trigger on January 30, 2017, 07:29:39 PM
And before you start any of this, make sure the carbs are nicely balanced.
Title: Re: Perfect Timing
Post by: philward on January 30, 2017, 07:44:33 PM
I bought a AccuSpark S8000 and after connecting pos/neg to battery and HT clip to HT lead doesn't produce a strobe light - Anybody else used this model? I suspect its the clip on HT lead that is loose fitting. Its some time since I bought it on ebay and no receipt (or know who I bought it off
Title: Re: Perfect Timing
Post by: royhall on January 31, 2017, 07:37:39 AM
Is the HT clip on the correct way round, there should be an arrow on it. It won't strobe if it's wrong.


Title: Re: Perfect Timing
Post by: Piki on January 31, 2017, 08:11:17 AM
I have a original HONDA Dwell Meter with strobe inclued, 100gbp + shipping cost  ;D ;D, contact me if you are interested.
Regards.
Title: Re: Perfect Timing
Post by: Trigger on January 31, 2017, 08:14:06 AM
I have a original HONDA Dwell Meter with strobe inclued, 100gbp + shipping cost  ;D ;D, contact me if you are interested.
Regards.

Good morning to the Spanish salesman  ;D ;D
Title: Re: Perfect Timing
Post by: Piki on January 31, 2017, 08:17:11 AM
Good Morning to my UK friends, I love that country  ;D ;D ;D ;D
Title: Re: Perfect Timing
Post by: Piki on January 31, 2017, 09:39:30 AM
I sent a mail to the seller and the offer has ended.......
Title: Re: Perfect Timing
Post by: philward on January 31, 2017, 11:25:54 AM
Is the HT clip on the correct way round, there should be an arrow on it. It won't strobe if it's wrong.

I'll check Roy but from memory its fixed to the strobe HT lead as it came in the box and I'm sure it can only be clipped on one way
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