V50 Starter solenoid |
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Brian UK
Moderator Group Joined: 13 May 2014 Location: Surrey Status: Offline Points: 17641 |
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It's possible, the springs push the slide against the carb body in the VHB. Did you set the idle speed with the engine warm?
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Brian.
Better 5 minutes late in this world than years early in the next. |
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Motty
Senior Member Joined: 03 Jun 2015 Location: South England Status: Offline Points: 269 |
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Have you balanced the carburetors? |
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It’s more fun to try to ride a slow bike fast .....
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paulrob100
Senior Member Joined: 22 Feb 2018 Location: Nottingham Status: Offline Points: 124 |
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I have only set the carbs on basic settings from the manual. I have rebuilt the engine, so its still bedding in. I cannot get the idle speed to adjust with the adjustment screws. If I blip the throttle, the engine revs, but then stays at a higher rpm, which makes me think that the slides are sticking.
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Brian UK
Moderator Group Joined: 13 May 2014 Location: Surrey Status: Offline Points: 17641 |
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If the throttle stop screws don't have any affect then there is a problem. Pull the slides out and check the point where those screws abut. Is it badly worn? You might be able to swap the slides left to right so there is a new surface. Cables got enough slack? Otherwise the slides are sticking and you will have to remove the carbs to find out why.
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Brian.
Better 5 minutes late in this world than years early in the next. |
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Mike H
Senior Member Joined: 21 May 2014 Location: East Anglia Status: Offline Points: 8733 |
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How are the mixture screws set? My manuals say 1.5 turns out but that's only a starting point, should be normally more like 2.5 turns out after setting up. Can be made to work at 1.5 turns out if slide stops are raised enough to compensate and produce an idle, but other weird behaviour can happen, guess how I know! In my case I wasn't getting engine braking because engine wasn't shutting down immediately when twistgrip shut, just like it was momentarily sticking open. |
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"Chicken nuggets don't dance on a Tuesday."
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AdrianW
Senior Member Joined: 05 May 2019 Location: Bristol Status: Offline Points: 993 |
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Mike,
Out of interest how do the idle screws work?? Is the mixture richened by more turns out or the other way around?? Thanks, Adrian Bristol UK |
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Mike H
Senior Member Joined: 21 May 2014 Location: East Anglia Status: Offline Points: 8733 |
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If memory serves, they basically control air flow in the idling circuit gallery in the carb body, but not as simple as saying it controls the air input versus petrol as it also picks up fuel from the idle jet.
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"Chicken nuggets don't dance on a Tuesday."
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AdrianW
Senior Member Joined: 05 May 2019 Location: Bristol Status: Offline Points: 993 |
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Thanks Mike...
Cheers, Adrian Bristol UK |
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Dave P.
Senior Member Joined: 12 Jan 2015 Location: Northants Status: Offline Points: 5573 |
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Sorry to contradict Mike but on VHB carbs the mixture screw regulates the fuel flow. Generally speaking, if the mixture screw is towards the engine then it regulates the fuel.If it is on the atmosphere end of the carb' then it regulates the air feed.Screw out for more of whichever,screw in for less.
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TO LIVE OUTSIDE THE LAW YOU MUST BE HONEST.
1971 V7 Special. 1972 850GT. 1970 T120 Bonnie. 2009 500 Bullet. |
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AdrianW
Senior Member Joined: 05 May 2019 Location: Bristol Status: Offline Points: 993 |
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Paul,
When you say "fiddling with a bit of other wiring" was that to fit the starter or to get something else to work? I'm interested in a Chinese starter as "insurance" - mine is a Lucas (aka "Prince of Darkness" by British bike owners) so a backup may be a good idea.. Thanks Adrian bristol UK |
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Mike H
Senior Member Joined: 21 May 2014 Location: East Anglia Status: Offline Points: 8733 |
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Yes you're right, basically, but the actual internals are a wee bit more involved, don't have my Dell'Orto manual to hand which explains it all |
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"Chicken nuggets don't dance on a Tuesday."
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paulrob100
Senior Member Joined: 22 Feb 2018 Location: Nottingham Status: Offline Points: 124 |
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Adrian. The Chinese starter fits straight on. The only downside is that the solenoid is bigger, so the plastic cover will not fit.
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AdrianW
Senior Member Joined: 05 May 2019 Location: Bristol Status: Offline Points: 993 |
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Paul,
Many thanks.. As a commitment to my little Guzzi (although it still doesn't deserve it at present!) I have bought one of these.. It's still in the box but at the price it seemed to be good insurance as the starter on my bike is a Lucas! The main body does look a bit more compact than the original unit but I am sure it will be fine if it is needed. I don't have a plastic cover on mine..! Thanks again, Adrian Bristol UK |
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