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V50 Starter solenoid

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Brian UK View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian UK Quote  Post ReplyReply Direct Link To This Post Posted: 05 Jul 2019 at 22:10
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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Post Options Post Options   Thanks (0) Thanks(0)   Quote Motty Quote  Post ReplyReply Direct Link To This Post Posted: 05 Jul 2019 at 22:14
Originally posted by paulrob100 paulrob100 wrote:


Another minor issue has reared its head. Once the bike is off choke, the idle speed rises quite a bit. If the throttle is opened. it will not return to normal idle speed, sitting around 2500 - 3000 rpm. The cbles seem to have free play at the carb end. Could it be the slides sticking ?
 

Have you balanced the carburetors?

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Post Options Post Options   Thanks (0) Thanks(0)   Quote paulrob100 Quote  Post ReplyReply Direct Link To This Post Posted: 06 Jul 2019 at 09:10
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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Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian UK Quote  Post ReplyReply Direct Link To This Post Posted: 06 Jul 2019 at 10:15
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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Post Options Post Options   Thanks (0) Thanks(0)   Quote Mike H Quote  Post ReplyReply Direct Link To This Post Posted: 06 Jul 2019 at 20:50
Originally posted by paulrob100 paulrob100 wrote:

I have only set the carbs on basic settings from the manual.
 

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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Post Options Post Options   Thanks (0) Thanks(0)   Quote AdrianW Quote  Post ReplyReply Direct Link To This Post Posted: 06 Jul 2019 at 21:03
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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Post Options Post Options   Thanks (0) Thanks(0)   Quote Mike H Quote  Post ReplyReply Direct Link To This Post Posted: 07 Jul 2019 at 13:54
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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Post Options Post Options   Thanks (0) Thanks(0)   Quote AdrianW Quote  Post ReplyReply Direct Link To This Post Posted: 07 Jul 2019 at 18:03
Thanks Mike...

Cheers,
Adrian
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dave P. Quote  Post ReplyReply Direct Link To This Post Posted: 07 Jul 2019 at 18:31
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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Post Options Post Options   Thanks (0) Thanks(0)   Quote AdrianW Quote  Post ReplyReply Direct Link To This Post Posted: 11 Jul 2019 at 09:27
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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Post Options Post Options   Thanks (0) Thanks(0)   Quote Mike H Quote  Post ReplyReply Direct Link To This Post Posted: 11 Jul 2019 at 13:08
Originally posted by Dave P. Dave P. wrote:

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.


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 Big smile


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Post Options Post Options   Thanks (0) Thanks(0)   Quote paulrob100 Quote  Post ReplyReply Direct Link To This Post Posted: 04 Aug 2019 at 07:39
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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Post Options Post Options   Thanks (0) Thanks(0)   Quote AdrianW Quote  Post ReplyReply Direct Link To This Post Posted: 04 Aug 2019 at 09:06
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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