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Author Topic: PD carb query  (Read 5580 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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Triumph Scrambler 1200X
CCM 604 dual sport
1977 K7 CR750
Ducati 900SS
James Captain 197 x2
Norman Nippy 50cc

"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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Triumph Scrambler 1200X
CCM 604 dual sport
1977 K7 CR750
Ducati 900SS
James Captain 197 x2
Norman Nippy 50cc

"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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