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Author Topic: PD carb query  (Read 2938 times)

Offline MarkCR750

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Re: PD carb query
« Reply #15 on: June 24, 2016, 07:56:22 PM »
Quote from: royhall on June 24, 2016, 07:37:25 PM
I don't agree with that. My carbs in that picture are PD41B circa 1977 F2. The later carbs are PD42B circa 1978 onwards. The bodies on both the F2 & K7 are the same just the jetting is different. That nozzle casting on mine has never been drilled and is airtight. Defo not a vent of any kind.

According to Harrisluv mine are PD41A, he seems to know his stuff, he rebuilds carbs as a sideline, he may have answered in brief not bothering to mention changeover dates etc, anyway I'm sure he's correct re my carbs due to the casting being slightly different , just got to unblock no2 and maybe 3&4 I haven't checked those yet, always something to do on a CB!.
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Offline MarkCR750

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Re: PD carb query
« Reply #16 on: June 24, 2016, 08:08:17 PM »
Here you go Roy, I found this image on google of a 41A body, the vent is the same as mine, so mine hasn't been adapted, about the only thing that hasn't !😄

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Suzuki GT250A (Nostalgia)
1977 K7 CR750 (lookalike, what of I’m not sure)
Ducati 900SS (Soul & Speed)
Ducati M900 Monster (Handling & character)
Thruxton 1200 (suits me)
James Captain 197 (pure adrenaline, i.e. no brakes!)
"Eff yir gitten awvestear yir gooin te farst"
Sir J.Stewart.

Offline royhall

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Re: PD carb query
« Reply #17 on: June 25, 2016, 10:04:56 AM »
I stand corrected. The bodies on the F2 & K7 carbs are not the same (always thought they were). Your PD41A carbs are off a K7 and the settings also differ to F2 ie. float height, main jet, air screw, needle setting. You learn a bit more about these old girls every day.
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Greebo

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Re: PD carb query
« Reply #18 on: June 25, 2016, 10:40:33 AM »
Quote from: MarkCR750 on June 24, 2016, 08:08:17 PM
Here you go Roy, I found this image on google of a 41A body, the vent is the same as mine, so mine hasn't been adapted, about the only thing that hasn't !😄



Mark
I have just checked mine again with a magnifying glass & torch & it looks like mine has a tad of brass blanking it off, I certainly can't see or get a very fine piece of fuse wire in any hole...
I don't usually have a problem finding the hole... ;D

[ my carbs are the exact same carbs as yours]

have you found anything further

Greebo
« Last Edit: June 25, 2016, 05:02:38 PM by Greebo »
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Offline MarkCR750

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Re: PD carb query
« Reply #19 on: June 25, 2016, 02:29:31 PM »
No I haven't had time to look today Greebo, out at 6am for a ride, breakfast at 8 with friends, straight back to clean the T250 for tomorrow now crashed out on the sofa, if there's a brass plug in there it sounds intentional, I'll ask Harrisuluv if they were modded later in production .
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Suzuki GT250A (Nostalgia)
1977 K7 CR750 (lookalike, what of I’m not sure)
Ducati 900SS (Soul & Speed)
Ducati M900 Monster (Handling & character)
Thruxton 1200 (suits me)
James Captain 197 (pure adrenaline, i.e. no brakes!)
"Eff yir gitten awvestear yir gooin te farst"
Sir J.Stewart.

Greebo

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Re: PD carb query
« Reply #20 on: June 25, 2016, 05:05:24 PM »
Mark

Ask Matt Harper here : http://m.harpers-ultrasonic.com/

He refurbishes these carbs & he is very helpful, give him a call
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Offline yozzer74

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Re: PD carb query
« Reply #21 on: June 27, 2016, 06:30:05 AM »
That's who did my carbs he is very helpful .
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