Thanks for making this tutorial , I'm having some real problems just like you have described. Spitting back through the air filter and putting the engine out and continuous stalling at lower revs .😫..
My friends and I use the smallest guitar string; I think it is .009”, very strong and stiff. Worked on my ‘69 Bonnie nicely. Possible to drill and tap the opposite side and use it for access on the close side and plug it after clearing. Appreciate your site !!
what a great video . very clearly presented , I have exactly the problem with the poor tick over you describe. Will now attempt to correct it as shown. Many thanks .
Paul remember the two holes in the center on the bottom of the throttle tube on either side of the back of the slide. The tickover fuel and air has to have somewhere to go after they have been mixed. Those two holes must be clear as well.
thank you, I cleaned mine a couple weeks ago, will have to do it again. starts but no idle. Initially i didnt have the right wire and thought it was good enough.. not so.
The hole from there into carb throat gets blocked as well, you can just drill out the jet with a 2.0mm drill taking care down the pilot screw hole taking care not not to damage the air screw seat you then put a new jet into the threaded boss in the top of the carb body float chamber usually used for 2 strokes
This is very informative, thank you. It's very hard to figure out these carbs when you start. But do you know if it's possible to replace the brass insert? After one hell of a game, clearing & re-blocking several times, I finally got the bike running okay, but too rich. Air screw is out over4 turns now, still black plugs so I fear I've over-done it
Thanks for sharing your knowledge its very much appreciated, my 68 A65 had rust particles in bottom of the float bowl and now wont start, I think these passage ways must be blocked I will have a go at clearing them 👍
Hi Paul great video question My bsa a65 concentric is pretty new ran great last year now it’s well blocked Do you know the max size drill I can use it says #78 drill equals to .40mm If I use a 0.6mm drill would this do any damage to the pilot system Thanks a lot phil
@@paulhenshaw4514 Cheers Paul Yes, I rang Amal today and actually ordered a new carb and will be using my blocked one for my other bike which requires one and will be having a poke about but won’t be using anything bigger than .0016 and won’t be drilling only poking 👌👌 That A65 you’re working on…. Blimey that looks like a nightmare and going to be an expensive one I’m sure 😌😌
The primary discharge ports, located on the floor of the venturi, clog up. The only way to clear them is to prick them clear. I use guitar string. It worked like a charm of the worked like a Charm on my 72 Trident..
That would probably work, although it is a bit of a juggling act getting something small enough in diameter, but strong enough for the job. I think the hole through the passageway is 0.015" diameter.
+Paul Henshaw a standard electric guitar first string gauge is 0.010 and gauges in increments of 0.001 from this are readily available for pence on the internet individually. PM me your address I'll send you a couple for nowt I've plenty spare kicking about. Be happy to, I've learned so much from watching your channel 😀
@@petergoddard1960 I use a G string from an electric guitar set.. they are 0.016" and can be purchased separately at any guitar shop for less than a quid.
Hi Paul I am Kumar I have just fitted new carb ( Amal mk1 concentric 26mm) and pod filter looks same as one that picture above on my bike ( 1984 Royal Enfield 350cc ) I have few questions to ask if you don’t mind and I guess as you are using Amal carb you would be able to clarify my doubt my questions are followe 1 I don’t find any difference of using Amal carb as I was using mikarb before or Am I tuning is not right way? 2 I feel the throttle cable is just a bit hard to throttle after changed to Amal carb ( have been told by mech just because of the spring in the Amal carb is high tensed one than one was on mikarb 3 after changing the airfilter from the Indian made box type to Amal pod one which gives me ‘kisk’ ‘ kisk’ noise or is that normal with that sort of filter as I never used that before replies will be much appreciated thanks
Hi Paul, thank you for making this video, I have a 67 tiger and it's hard starting, it only stays running when I'm working the tickler and the throttle at the same time. Do you think this is my issue a blocked passageway. Thanks if you could please respond.
@@paulhenshaw4514 thedischarge ports r even smaller. The heat soak on the middle carb's pot metal causes the most clogging. That's why the middlecylender looks hotter, it'S just leaner. Most of these carbs have been around since the 70's. The deposits were hard crystalized crud I have'nt seen since.
@@paulhenshaw4514 hey Paul , has anyone drilled these out larger? If so, what happened or what do you think would happen? Are they not controlled by a tapered screw anyway? At least it would make it easier to clean.
@@pauliebots a fair point, but the hole controls the amount of fuel allowed through and the air screw, being what it is called only adjusts the amount of air mixed with that pre determined amount of fuel, so enlarging the hole would create a much over rich setting, much like having the choke on.
@@pauliebots Yes, especially as I seem to have a serial 'disliker' - many of my videos seem to have just one dislike and I think it may be the same sad individual.
Oh dear, another prime bodger. pokeing steel through a jet not a good idea at all ! Much easier to buy a 78 wire guage drill (16 thou) and use it to clear and resize the jet. Easy to remove and replace the welsh plug, this will give access to all jet and discharge holes.
'Oh dear' my ar*e! I know about the 16 thou, thank you very much. I think you had better watch some of my other videos before you call me a 'prime bodger', you aloof, judgemental tw*t!!!!!!!!! Who TF do people like you think you are?????
Thanks for making this tutorial , I'm having some real problems just like you have described. Spitting back through the air filter and putting the engine out and continuous stalling at lower revs .😫..
My friends and I use the smallest guitar string; I think it is .009”, very strong and stiff. Worked on my ‘69 Bonnie nicely.
Possible to drill and tap the opposite side and use it for access on the close side and plug it after clearing. Appreciate your site !!
Thank you Paul. Have exactly those symptoms, spitting back through the carburettor and very poor idle. Will have a go at cleaning out my carb.
what a great video . very clearly presented , I have exactly the problem with the poor tick over you describe. Will now attempt to correct it as shown.
Many thanks .
Thanks and hope this helps!
Paul remember the two holes in the center on the bottom of the throttle tube on either side of the back of the slide. The tickover fuel and air has to have somewhere to go after they have been mixed. Those two holes must be clear as well.
I pull a wire from a wire brush for this kind of job, very stiff and works well.
my 1967 trophy was only running on one cylinder and wouldn’t idle tried your trick used the wire out of a mig welder now she runs perfectly thanks
Great and thanks for letting me know, glad my video helped you!
Cleaned my 72 a65 thunderbolt carb pilot jet like this tick over like a watch thanks
Guitar string (thinnest) worked a treat for me. Pilot jet clear, now off to buy new set of strings!
I have since found a long, slim sewing needle also works.
air from a g-string?
Great Video - Thanks Paul
Very useful video. Thanks for posting.
thank you, I cleaned mine a couple weeks ago, will have to do it again. starts but no idle. Initially i didnt have the right wire and thought it was good enough.. not so.
They clog up quick if the bike sits. Pain in the butt.
thank you. I think that the blocked pilots are the problem on my T140v will strip them tomorow
The hole from there into carb throat gets blocked as well, you can just drill out the jet with a 2.0mm drill taking care down the pilot screw hole taking care not not to damage the air screw seat you then put a new jet into the threaded boss in the top of the carb body float chamber usually used for 2 strokes
I think a man named Brian Stratton made a video on what you're talking about. If you find it let me know if that is what you were saying.
Thanks Paul, good advice
Would squirting a big of carb cleaner in the holes help things along?
Probably not, this stuff sets like concrete, in very small passageways and ususually collects at a 90 degree turn.
This is very informative, thank you. It's very hard to figure out these carbs when you start. But do you know if it's possible to replace the brass insert? After one hell of a game, clearing & re-blocking several times, I finally got the bike running okay, but too rich. Air screw is out over4 turns now, still black plugs so I fear I've over-done it
*Stretton
Thanks for sharing your knowledge its very much appreciated, my 68 A65 had rust particles in bottom of the float bowl and now wont start, I think these passage ways must be blocked I will have a go at clearing them 👍
The tank must be rusty so suppose I will have to coat it inside as well
Thanks Mark, glad it helped. An inline filter in the fuel line will probably do the trick.
Good advice. Method to re-seal drilled blank would be good to know.
If you decide to go in from that side, a blob of Araldite or similar will close it up afterwards.
The hard way is threading the hole and installing a plug.
Hi Paul great video question
My bsa a65 concentric is pretty new ran great last year now it’s well blocked
Do you know the max size drill I can use it says #78 drill equals to .40mm
If I use a 0.6mm drill would this do any damage to the pilot system
Thanks a lot phil
Hi Phil, 0.016" rings a bell for the pilot passageway diameter.
@@paulhenshaw4514
Cheers Paul
Yes, I rang Amal today and actually ordered a new carb and will be using my blocked one for my other bike which requires one and will be having a poke about but won’t be using anything bigger than .0016 and won’t be drilling only poking 👌👌
That A65 you’re working on…. Blimey that looks like a nightmare and going to be an expensive one I’m sure 😌😌
pure gold
Thanks!
The primary discharge ports, located on the floor of the venturi, clog up. The only way to clear them is to prick them clear. I use guitar string. It worked like a charm of the worked like a Charm on my 72 Trident..
Great info, thanks
How did you seal up the hole you drilled?
I didn't drill a hole, although some people do.
Just an idea, but a fine gauge guitar or banjo string might be fine enough. Thanks for the clear info on that.
That would probably work, although it is a bit of a juggling act getting something small enough in diameter, but strong enough for the job. I think the hole through the passageway is 0.015" diameter.
+Paul Henshaw a standard electric guitar first string gauge is 0.010 and gauges in increments of 0.001 from this are readily available for pence on the internet individually. PM me your address I'll send you a couple for nowt I've plenty spare kicking about. Be happy to, I've learned so much from watching your channel 😀
@@petergoddard1960 I use a G string from an electric guitar set.. they are 0.016" and can be purchased separately at any guitar shop for less than a quid.
@@farric1 he said "g string".
Lol.
Hi Paul
I am Kumar I have just fitted new carb ( Amal mk1 concentric 26mm) and pod filter looks same as one that picture above on my bike ( 1984 Royal Enfield 350cc ) I have few questions to ask if you don’t mind and I guess as you are using Amal carb you would be able to clarify my doubt my questions are followe
1 I don’t find any difference of using Amal carb as I was using mikarb before or Am I tuning is not right way?
2 I feel the throttle cable is just a bit hard to throttle after changed to Amal carb ( have been told by mech just because of the spring in the Amal carb is high tensed one than one was on mikarb
3 after changing the airfilter from the Indian made box type to Amal pod one which gives me ‘kisk’ ‘ kisk’ noise or is that normal with that sort of filter as I never used that before
replies will be much appreciated
thanks
Hi Paul, thank you for making this video, I have a 67 tiger and it's hard starting, it only stays running when I'm working the tickler and the throttle at the same time. Do you think this is my issue a blocked passageway. Thanks if you could please respond.
Hi Nick, it sounds like this could well be your problem.
@@paulhenshaw4514 thanks Paul, it only stays running, when I'm working the tickler and the throttle at the same time
16 thou is the hole size.which is just over 0.4 mm
16 thou or 0.4 mm drill bit,once dunked some for 48 hours in white vinegar,
The old gasoline formula probably caused this . See Uncle Tony's Garage on ethanol gas.
The pilot drillings / jets in these carbs are so small, they are at risk whatever the fuel.
@@paulhenshaw4514 thedischarge ports r even smaller. The heat soak on the middle carb's pot metal causes the most clogging. That's why the middlecylender looks hotter, it'S just leaner. Most of these carbs have been around since the 70's. The deposits were hard crystalized crud I have'nt seen since.
@@paulhenshaw4514 hey Paul , has anyone drilled these out larger? If so, what happened or what do you think would happen? Are they not controlled by a tapered screw anyway? At least it would make it easier to clean.
@@pauliebots a fair point, but the hole controls the amount of fuel allowed through and the air screw, being what it is called only adjusts the amount of air mixed with that pre determined amount of fuel, so enlarging the hole would create a much over rich setting, much like having the choke on.
@@paulhenshaw4514 figured there was a reason hole was tiny. Thank you.
camera on tripod would had been a good idea i feel drunk after watching the vid
I don't have a tripod and no one else has complained. Don't forget to dislike my video, although it's a cheap way of feeling drunk for you.
@@paulhenshaw4514 hey zero dislikes very unusual.
@@pauliebots Yes, especially as I seem to have a serial 'disliker' - many of my videos seem to have just one dislike and I think it may be the same sad individual.
Oh dear, another prime bodger. pokeing steel through a jet not a good idea at all ! Much easier to buy a 78 wire guage drill (16 thou) and use it to clear and resize the jet. Easy to remove and replace the welsh plug, this will give access to all jet and discharge holes.
'Oh dear' my ar*e! I know about the 16 thou, thank you very much. I think you had better watch some of my other videos before you call me a 'prime bodger', you aloof, judgemental tw*t!!!!!!!!! Who TF do people like you think you are?????