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Locked Re: Running question


 

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Ah, thanks, I¡¯ll check that out, really appreciate the clarification.?

Best?
Chris?


On Jan 5, 2023, at 1:24 PM, Kirk Ratzel <eur90s@...> wrote:

No, I¡¯m referring to the carb float bowl overflow ¨C a sure sign of a worn needle-jet (rubber tip) which reeks havoc with fuel flow at can ultimately completely fail and drain fuel from the tank onto your riding boot while in motion. Ethanol mix fuels are tough on these, and they can go with little warning. Could it explain the sudden weird fuel metering?
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Kirk
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From:?[email protected]?<[email protected]>?On Behalf Of?Chris Perry
Sent:?Thursday, 5 January 2023 02:12
To:?[email protected]
Subject:?Re: [R90SWORLDNET] Running question
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Hey Kirk,
Are you referring to the small pee tube under the tank? ?There probably hasn¡¯t been a line attached to it in decades (if ever), but I don¡¯t smell any fuel or see any fuel stains below it or on the motor etc. ?If there¡¯s an overflow on the Del¡¯s it¡¯s new to me but I¡¯m more familiar w Bings.?
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It¡¯s been topped off a few times and no losses are evident.?
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Thanks?
?


On Jan 4, 2023, at 1:26 PM, Kirk Ratzel <eur90s@...> wrote:
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Losing no fuel via the overflow??

Best regards, Kirk


On 3 Jan 2023, at 22:40, Chris Perry <cdp888@...> wrote:

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Thank you Mac, so you adjusted the float bowls to a higher fuel consumption level and it helped at higher speeds? ?Sounds like an issue I had with Bings many years ago, but not as familiar with the Delortos. ?
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Chris?
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On Jan 3, 2023, at 4:34 PM, Mac Kirkpatrick <drbeemer73@...> wrote:
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Had same symptoms. Although float bowl levels seemed ok, ?I gradually increased the fuel level until the prob went away.?
At first it ran fine at Hwy speeds, but then went into stumble mode.?
Fuel starvation.?
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Mac Kirkpatrick
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On Tue, Jan 3, 2023 at 14:29 Chris Perry <cdp888@...> wrote:

Happy New Year All,??

So I¡¯m going to do my best to describe an issue I¡¯m having (and have been troubleshooting with my trusted mechanic) to get opinions, which may help in the process of elimination.?

At highway passing/overtake speeds I get a hesitation or hiccup type problem, usually above 55 mph, also sometimes feel starved at idle at stops, which seems to get worse the longer the engine is running.? Strangely, it¡¯s feels quite powerful and runs great around town though.?

Transmission & clutch fully rebuilt, plug gaps, timing (with EME electronic ignition), and Delorto¡¯s balanced and needles checked, all new fuel lines also checked, compression is fine too.? ?

Advice really appreciated if you have any, cheers!?

Chris?



--?
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Mac Kirkpatrick
Glenmoore, PA
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"After all, what is adventure, but inconvenience, properly regarded?"
C. Donahue
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