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As other's already indicated, look too high to get near specification on tickover. http://www.sohc.co.uk/index.php/topic,17769.0.html this link will help and give you a routine that should correct the mechanical positioning within their carb set to normalise their position, and hence give to the adjustment that makes normal setup.
BryanJ or Oddjob will be able to advise more on the PD's I'm sure. I could be wrong but I think on those #2 carb is fixed and you bench sync the other carbs to the same level as #2. I can't help any more as luckily, I don't have PD's fitted to any of my DOHC/4's.
Quote from: Nurse Julie on January 19, 2020, 05:43:28 PMBryanJ or Oddjob will be able to advise more on the PD's I'm sure. I could be wrong but I think on those #2 carb is fixed and you bench sync the other carbs to the same level as #2. I can't help any more as luckily, I don't have PD's fitted to any of my DOHC/4's.Has Trig managed some incredible engineering and somehow fitted a second camshaft to your bikes???. (Sorry, couldn't resist!)Sent from my POT-LX1 using Tapatalk
PD's are one of those things that cause "sick days" among most mechanics. Yes one carb is non adjustable and i think it is No2, that one MUST fully close before attempting to bench sync the bank.I do have some odd bits left over from a 550 set and NO I WONT DO THE JOB
Hi MitchtagI have spent hours getting my PD46A's running well on my 550 and grew a beard trying to sort out an intermittent problem (which may cause the fast idle)?I had a choke flap which was catching the carb body and sometimes didn't release as it should when closing the choke.You can see the score mark on the attached image, just check the choke mechanism is fully moving freely by observing the choke linking rod.Good LuckChris
As said those look too high to me, would account for the high revving on startup and idling. As you haven't taken the throttle slides off their linkage arms it's unlikely to be that, saying that how do you know the previous owner didn't? As Bryan says, one carb which I'm 99% sure is number 2 is non adjustable, if that sits high then the rest will too. The problem is most likely the linkage between the carbs, if you disassemble the carbs from the linkage plate look to see if the throttle slides now sit lower, especially number 2. If it does it's the linkage bar or the choke mechanism. Check to see if you can find the problem with them. Been a while since I had a set of PDs carbs apart so can't remember if it has butterfly adjustment screws like the 500 carbs, if so check those.
Just found some pics of the PD46A carbs abd you are correct, there are no butterfly adjustment screws on them. I presume you've unscrewed the idle adjustment screw as far as it will go?The other possibility is the linkage which is on number 2 carb, looking at the pics it appears the butterfly (where the cables clamp) runs the cables down to the linkage where the cable nipples engage, this linkage appears to be attached to number 2 carb and if it's been disassembled it could have been put together again wrong or the return spring on it has broken. Have you tried running the engine with the throttle cables totally detached?