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Carbs suck?

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Ken-Guzzibear View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ken-Guzzibear Quote  Post ReplyReply Direct Link To This Post Posted: 05 Oct 2020 at 11:06
Guzzis are fairly simple beasties ..... when getting a fault, especially after working on it spend time looking at everything YOU touched 9/10 times you will see the issue.
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Tony G View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Tony G Quote  Post ReplyReply Direct Link To This Post Posted: 14 Oct 2020 at 16:40
So after patting myself on the back, I decided as it takes a few more cranks of the engine too fire up each time I start it. Splutter splutter. as if it's flooded. I'd treat my guzz too a carb rebuild. Got them from Euro carbs. The last job was new o rings on the mixture and idle screws. no splutter, just the engine cranking. when I turned the ignition off there a very loud pop! Hmm battery is on charge and kettle on.Confused
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Post Options Post Options   Thanks (0) Thanks(0)   Quote iansoady Quote  Post ReplyReply Direct Link To This Post Posted: 15 Oct 2020 at 11:44
I used to get that pop on switching off sometimes. I realised that switching off caused both coils to fire and if one pot had stopped at the right point it could ignite the mixture in the combustion chamber.
Ian
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Tony G View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Tony G Quote  Post ReplyReply Direct Link To This Post Posted: 15 Oct 2020 at 17:44
Interesting, dose it course any lasting damage
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Post Options Post Options   Thanks (0) Thanks(0)   Quote iansoady Quote  Post ReplyReply Direct Link To This Post Posted: 16 Oct 2020 at 10:51
Not that I know of. It's strange that some people experience it but not others. Also, sometimes it happened every time I switched on & off, other times not at all.
Ian
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Tony G Quote  Post ReplyReply Direct Link To This Post Posted: 16 Oct 2020 at 14:43
hmm. is it worth turning the fuel taps off or leave them on. Prehaps I'll stick with turning them off.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote iansoady Quote  Post ReplyReply Direct Link To This Post Posted: 17 Oct 2020 at 11:26
I don't think it would make any difference - but no harm in experimenting. I think I probably left mine on so there may have been a bit of leakage.
Ian
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Tony G Quote  Post ReplyReply Direct Link To This Post Posted: 17 Oct 2020 at 17:06
Thanks Ian
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Tony G Quote  Post ReplyReply Direct Link To This Post Posted: 19 Oct 2020 at 15:06
Checked fuel flow, no problem. I was starting to think ignition. Then I read a post on spark plugs, on another thread. I checked the gap. 1st spark plug was a tight .25 thou. The 2nd plug gap was too wide. 
    I've set the mixture screw out 1 turn. Idle screw all the way in, then out 1 and 1/2 turns out. bike wanted to start but spluttered. I screwed Idle in 1/4 turn the engine fired. the warmer it got the higher the revs got. After I turned idle screws out 1/4 of a turn each it idled nice. I think it's happy at 1500 revs. A bit high but with use hopefully I'll get their.
    once again thanks for advice.LOLSmile 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote AdrianW Quote  Post ReplyReply Direct Link To This Post Posted: 20 Oct 2020 at 12:00
Tony,
I have had all sorts of grief with my V35II..  As part of this I had a go at the VHBZ carbs. Replaced needles & needle jet / atomisers, float needles etc.
It now starts and runs fine, plugs a good colour. It idles ok at first but increases to 2k (I am not confident my tacho is all it could be) when hot. I'm happy it starts & goes and can live with the tickover at present.
I find sometimes the more you mess the worse things get..

Cheers,
Adrian
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Tony G Quote  Post ReplyReply Direct Link To This Post Posted: 20 Oct 2020 at 13:54
Your right there Adrian. it's time to stop messing and enjoy the last of the biking season.SmileSmile
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Mike H Quote  Post ReplyReply Direct Link To This Post Posted: 20 Oct 2020 at 14:31
If it's like the big blocks I had, it won't idle properly until properly hot, can't warm  it up properly in the garden / shed/ garage, ride it about 10 miles with a screwdriver in your pocket, stop somewhere THEN set the idle speed. Big smile

"Chicken nuggets don't dance on a Tuesday."
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Mike H Quote  Post ReplyReply Direct Link To This Post Posted: 20 Oct 2020 at 14:33
PS: in other words until up to temp, it won't idle throttle shut. 

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Post Options Post Options   Thanks (0) Thanks(0)   Quote Tony G Quote  Post ReplyReply Direct Link To This Post Posted: 20 Oct 2020 at 15:40
Thanks Mike. I had the same thought this morning. Apart from the screw driver in my pocket
Tony
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