Author Topic: jumping ...missing and backfiring  (Read 10129 times)

Offline Trigger

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Re: jumping ...missing and backfiring
« Reply #30 on: April 12, 2015, 06:48:29 PM »
+1 with Sparrow on this one  :)

Offline mike the bike

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Re: jumping ...missing and backfiring
« Reply #31 on: April 12, 2015, 07:07:36 PM »
It was just a thought.  A way of improving knowledge and experience that makes one an expert.
Where's that 10mm socket got to?

Offline billy192

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Re: jumping ...missing and backfiring
« Reply #32 on: April 13, 2015, 11:58:43 AM »
no i did not refit the coils. i did do nearly 200 lovely miles Sunday. it has a small missfire at around 3K like a hesitation but other than that it runs great. i will re check the timing when i have five Min's.  I called in Abergavenny on Sunday and when i described the hesitation at 3k a chap there who said he had a Honda dealership back in the 70-80s said the autoadvance springs were a bit tired. and a fix they used to do back then was to chop off the eye of the spring and fashion a new eye thus shortening the spring by a tiny amount made up for the slack in the counter weight. has any one hared of this?
Billy
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Billy

Offline tom400f

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Re: jumping ...missing and backfiring
« Reply #33 on: April 13, 2015, 01:00:23 PM »
No but if you could get hold of a strobe light you could check if the auto-advance is working properly, which might be better than trying something irreversible...  :)
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Offline Bitsa (Ralph Wright - RIP)

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Re: jumping ...missing and backfiring
« Reply #34 on: April 13, 2015, 01:06:48 PM »
Agree with Tom.Seem to remember there is a topic about this on the states site
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Bitsa
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Offline Lobo

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Re: jumping ...missing and backfiring
« Reply #35 on: April 15, 2015, 03:33:01 AM »
I'm with Tom here.... there's no going back when it comes to destructive testing...

This thread discusses springs a bit.. if of any use.

http://forums.sohc4.net/index.php/topic,114960.0.html?PHPSESSID=s38h0m3sbn7e2uqcpa1cofnhp1

.... and if you find a nice / new replacement source let me know... my K2 runs fine, but the springs do have that 'Dolly Parton' look about them.

Simon

Offline tom400f

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Re: jumping ...missing and backfiring
« Reply #36 on: April 15, 2015, 09:02:14 AM »
.... and if you find a nice / new replacement source let me know... my K2 runs fine, but the springs do have that 'Dolly Parton' look about them.
;D ;D ;D
1978 CB400F2 Yellow
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Offline billy192

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Re: jumping ...missing and backfiring
« Reply #37 on: April 18, 2015, 08:33:44 PM »
Well I found the fix
The auto advance was semi seized (I may have sprayed dry chain lube in it) it was stiff as hell but did move so it was all or nothing so when I strobed it the marks were not at all static now as I rev they come it to view as the revs rise


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Billy

Offline tom400f

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Re: jumping ...missing and backfiring
« Reply #38 on: April 18, 2015, 09:36:10 PM »
Awesome  :D
1978 CB400F2 Yellow
1995 VFR750FS Red
1997 VFR750FV Lapis Blue
2013 Yamaha FZ8 Grey

 

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