Carbs suck? |
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Ken-Guzzibear
Moderator Group Joined: 13 May 2014 Location: Sileby Leics Status: Offline Points: 9454 |
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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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The Older i Get, The Better I Was
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Tony G
Senior Member Joined: 02 Aug 2020 Location: CO Durham Status: Offline Points: 375 |
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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.
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I'll get their soon
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iansoady
Senior Member Joined: 23 Jul 2017 Location: Redditch Status: Offline Points: 2402 |
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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.
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Ian
1952 Norton ES2 1986 Honda XBR500 1958-ish Greeves/Triumph in progress |
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Tony G
Senior Member Joined: 02 Aug 2020 Location: CO Durham Status: Offline Points: 375 |
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Interesting, dose it course any lasting damage
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iansoady
Senior Member Joined: 23 Jul 2017 Location: Redditch Status: Offline Points: 2402 |
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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.
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Ian
1952 Norton ES2 1986 Honda XBR500 1958-ish Greeves/Triumph in progress |
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Tony G
Senior Member Joined: 02 Aug 2020 Location: CO Durham Status: Offline Points: 375 |
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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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iansoady
Senior Member Joined: 23 Jul 2017 Location: Redditch Status: Offline Points: 2402 |
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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.
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Ian
1952 Norton ES2 1986 Honda XBR500 1958-ish Greeves/Triumph in progress |
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Tony G
Senior Member Joined: 02 Aug 2020 Location: CO Durham Status: Offline Points: 375 |
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Thanks Ian
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I'll get their soon
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Tony G
Senior Member Joined: 02 Aug 2020 Location: CO Durham Status: Offline Points: 375 |
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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.
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AdrianW
Senior Member Joined: 05 May 2019 Location: Bristol Status: Offline Points: 993 |
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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 Bristol UK
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Tony G
Senior Member Joined: 02 Aug 2020 Location: CO Durham Status: Offline Points: 375 |
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Your right there Adrian. it's time to stop messing and enjoy the last of the biking season.
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Mike H
Senior Member Joined: 21 May 2014 Location: East Anglia Status: Offline Points: 8733 |
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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.
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"Chicken nuggets don't dance on a Tuesday."
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Mike H
Senior Member Joined: 21 May 2014 Location: East Anglia Status: Offline Points: 8733 |
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PS: in other words until up to temp, it won't idle throttle shut.
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"Chicken nuggets don't dance on a Tuesday."
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Tony G
Senior Member Joined: 02 Aug 2020 Location: CO Durham Status: Offline Points: 375 |
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Thanks Mike. I had the same thought this morning. Apart from the screw driver in my pocket
Tony
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