The pilot solved 90% of my issues, the needle refined it, and I'm old and slow so I just assume the main is right . Reset idle to recommended settings and test ride motorcycle. Check as you wait for your new jet and see that you do not have the float set too low. Liked it? Wow. I use the smallest diameter screwdriver so I generate the least amount of torque.

A pilot air screw will be located on the air box side, while a fuel screw will be located on the engine side. The problem is it still has a bog, as if an acceleration pump is no good, which it dosen’t have. leave the jetting on the rich side. Re: Am I lean or rich on the pilot jet? The pilot jet is sized correctly if the fuel screw setting falls between 2.5-3 turns out. I complete grasp the concept although I think the human factor may introduce far too many variables to keep things accurate. 19 3 rings Of coarse I have a timing light. At least on 2 strokes... A combination of knowing how the books running and plug readings let me know what my bikes up to jetting wise. It never used to bog with the old carb. I had no idea just how far it would spread though, if you do a Google search on Spanky's Jetting this article is all over the net in multiple forums. Next a plug read (color). A rich pilot setting will result in hard starting, plug fouling at low RPM’s, sputtering as the throttle is cracked opened. This symptom of a lean or rich condition is quite common on any carburetor, however, those that have the new Amal Premier carburetors or Wassell Evolution carbs will have the liberty of fine tuning the pilot circuit by swapping out the "removable pilot jets" Back on the bike, with gas going to it, I found that the tickler would bearly move the float. How-To: Size Your Pilot Jet, Pilot Screw Explained, 8 MUST Have Modifications – Harbor Freight Blast Cabinet, How-To: Prevent flash rust on metal parts, How-To: WOOD DIY Vapor Blaster Plans 42×30, How-To: MRCOOL DIY Mini Split Installation, How-To: Honda CB750 Carburetor Rebuild 1969-1976. It idles strong now with the mixture screw out 1 1/2 turns out. After trying to get the carb to run right with its other apparent issues, I finnaly yanked the tickler out of this brand new amal premiere carb because it kept hanging up and I could see that it wasn’t going down enough. How are you guys dialing in air/fuel ratios off the butt dyno? I just use the 1 to 2.5 turn "rule" because it makes it easier to explain. Out of the box, I installed it and of course it ran like crap. Way quicker and way more accurate. In addition, if the fuel level is set too high in the float chamber, a rich mixture will result. I experimented with the needle hight. The pre-school pictures awesome too , This topic comes up so often that I sat down a long time ago and wrote this up do I could just copy/paste it in jetting threads. Of coarse I have a timing light. Some finess was required to make a new flare, but anything is better than the crap they passed at the factory.

Should you find yourself in this predicament I recommend that you keep reading our Tech Tip post.. A pilot jet is a circuit (or meter) that controls the flow rate of fuel that is drawn into your carburetor, Different size pilot jets can help you achieve a rich or lean condition. When the pilot jet is way too rich, you are forced to use the idle screw to open the slide so far in order to keep the engine running that the pilot circuit is partially bypassed, and the engine is actually starting to draw fuel through the needle jet. See below. What you are after when adjusting this screw, is too reach peak idle RPM and smoothness. How do you determine the size of the jet you have? If these change, you may have to change jetting to suit. Like my articles and How-To videos? Seems clear as day, but I'll be damned if can can tell the difference sometimes. 15 1 ring Leanest? By the time I was done setting and checking throttle response, I was only 1 turn out from seat. Now, adjust between these two settings to achieve highest RPM and smoothest running engine.

Lean: A "lean" condition is what occurs when you have insufficient fuel in your mixture creating an over abundance of oxygen. A dyno run is only on the main jet, just like the dedicated plug choppers. I was thinking the bike was rich and adding to the air screw. That leaves massive amounts of needle tuning which can really only be done by the person whose bike it is. I’ve seen the pilot air screw on the engine side on most Amal carburetors. I look forward to it tho. The engine was overhauled 10 years ago and still has great compression. This condition is primarily caused by dirty air filters, but it could also result from the incorrect fitting of after-market accessories such as exhaust systems, air filter systems, or replacement carburetors of a different type or size. I put a .019 idle jet in it, up from the stock .017, skipping the .018 because it was idling very lean. I bought my first bike 6 months ago, and a member on here was kind enough to PM me and walk me through the process. A few years ago I put in Boyer ignition. It will also cause a lean condition on the stand. It's not as hard as it sounds, and jetting can be changed in 30 minutes. I’ve had this bike over thirty years and have put plenty of point sets in it. These images are from my YZ250 OSM. Required fields are marked *. Tickeling is immediate now and the float is dead on. If you're satisfied with how it's running, that's all that really matters. Not necessarily. Your email address will not be published. The problem is it still has a bog, as if an acceleration pump is no good, which it dosen’t have. This is borderline needing to jet down, correct? The first step is to determine if you have an AIR screw that meters air, or a FUEL screw that meters fuel. It's probably backwards, but efi seems so much easier and far more accurate. I now I replaced the coils some tme in the past wih stock new ones. Copyright© ThumperTalk, Inc. - All rights reserved.ThumperTalk® is a registered trademark. Anyway, once it’s past the bog it’s on it’s way to doing 100mph with no problem. Please note, comments must be approved before they are published, Triumph Motorcycle Inspired Shirts - Choose Shirt Style / Color / Size, 1950 BSA A10 Goldenflash Motorcycle T-Shirt, BSA Vintage Empire Star Motorcycle T-Shirt, ALL ORDERS SHIP SAME DAY BEFORE 12PM (PST) - DUE TO COVID-19 EXPECT DELAYS ON ALL DOMESTIC & INTERNATIONAL DELIVERY DATES, Create Account or Log In (No Account Needed To Order), Runs better when air screw is screwed all the way out, Should you have a lean condition, you must install a larger pilot jet, Should you have a rich condition, you must install a smaller pilot jet. At least on a 4 stroke dyno tuning is the most accurate method. Do this for every 1/8th of a turn of the throttle. …… Any more? The new carb was obviously running too lean at idle. I put a .021 idle jet in it, up from the stock .017, skipping the .019 because it was idling very lean. To remedy, clean your air filter, have your mechanic check the exhaust and … Symptoms of a rich condition can be a rough running engine (sputtering), a black spark plug, a wet plug or excessive plug fouling. If you can’t find the screw, it may be hiding under a welch plug. Moving the clip and or different straight diameters will change the time it takes, at the same throttle position to 'make the run'. Need chart showing Premier Pilot Jet sizes and Number of rings for each size and lean to richness for the full spectrum of jets. This video walks you through removing them. Hopefully you don't run it this way for long, terminal for engines. Even though it ran fine in the middle possition, it runs throatyer it the richer position. If your air screw is out further than 2.5 turns, you need a leaner pilot. It has straight pipe hollow mufflers with one of those old time cheap little baffels stuck in the end.

I am thinking now, maybe the coils arn’t liking the compression load with the new carb. For example # 19 has 3 rings, does a #17 have 2 rings or 5 rings? A few years ago I put in Boyer ignition. I was thinking the bike was rich and adding to the air screw. This is the engine telling you it is happy, and it runs best at this mixture. How to "feel" when running too rich/lean? If the bike is running too rich it feels boggy on top and fouls plugs. I now am completely hooked on jetting software that allows me to figure out the correct needle height.

The pilot solved 90% of my issues, the needle refined it, and I'm old and slow so I just assume the main is right . Reset idle to recommended settings and test ride motorcycle. Check as you wait for your new jet and see that you do not have the float set too low. Liked it? Wow. I use the smallest diameter screwdriver so I generate the least amount of torque.

A pilot air screw will be located on the air box side, while a fuel screw will be located on the engine side. The problem is it still has a bog, as if an acceleration pump is no good, which it dosen’t have. leave the jetting on the rich side. Re: Am I lean or rich on the pilot jet? The pilot jet is sized correctly if the fuel screw setting falls between 2.5-3 turns out. I complete grasp the concept although I think the human factor may introduce far too many variables to keep things accurate. 19 3 rings Of coarse I have a timing light. At least on 2 strokes... A combination of knowing how the books running and plug readings let me know what my bikes up to jetting wise. It never used to bog with the old carb. I had no idea just how far it would spread though, if you do a Google search on Spanky's Jetting this article is all over the net in multiple forums. Next a plug read (color). A rich pilot setting will result in hard starting, plug fouling at low RPM’s, sputtering as the throttle is cracked opened. This symptom of a lean or rich condition is quite common on any carburetor, however, those that have the new Amal Premier carburetors or Wassell Evolution carbs will have the liberty of fine tuning the pilot circuit by swapping out the "removable pilot jets" Back on the bike, with gas going to it, I found that the tickler would bearly move the float. How-To: Size Your Pilot Jet, Pilot Screw Explained, 8 MUST Have Modifications – Harbor Freight Blast Cabinet, How-To: Prevent flash rust on metal parts, How-To: WOOD DIY Vapor Blaster Plans 42×30, How-To: MRCOOL DIY Mini Split Installation, How-To: Honda CB750 Carburetor Rebuild 1969-1976. It idles strong now with the mixture screw out 1 1/2 turns out. After trying to get the carb to run right with its other apparent issues, I finnaly yanked the tickler out of this brand new amal premiere carb because it kept hanging up and I could see that it wasn’t going down enough. How are you guys dialing in air/fuel ratios off the butt dyno? I just use the 1 to 2.5 turn "rule" because it makes it easier to explain. Out of the box, I installed it and of course it ran like crap. Way quicker and way more accurate. In addition, if the fuel level is set too high in the float chamber, a rich mixture will result. I experimented with the needle hight. The pre-school pictures awesome too , This topic comes up so often that I sat down a long time ago and wrote this up do I could just copy/paste it in jetting threads. Of coarse I have a timing light. Some finess was required to make a new flare, but anything is better than the crap they passed at the factory.

Should you find yourself in this predicament I recommend that you keep reading our Tech Tip post.. A pilot jet is a circuit (or meter) that controls the flow rate of fuel that is drawn into your carburetor, Different size pilot jets can help you achieve a rich or lean condition. When the pilot jet is way too rich, you are forced to use the idle screw to open the slide so far in order to keep the engine running that the pilot circuit is partially bypassed, and the engine is actually starting to draw fuel through the needle jet. See below. What you are after when adjusting this screw, is too reach peak idle RPM and smoothness. How do you determine the size of the jet you have? If these change, you may have to change jetting to suit. Like my articles and How-To videos? Seems clear as day, but I'll be damned if can can tell the difference sometimes. 15 1 ring Leanest? By the time I was done setting and checking throttle response, I was only 1 turn out from seat. Now, adjust between these two settings to achieve highest RPM and smoothest running engine.

Lean: A "lean" condition is what occurs when you have insufficient fuel in your mixture creating an over abundance of oxygen. A dyno run is only on the main jet, just like the dedicated plug choppers. I was thinking the bike was rich and adding to the air screw. That leaves massive amounts of needle tuning which can really only be done by the person whose bike it is. I’ve seen the pilot air screw on the engine side on most Amal carburetors. I look forward to it tho. The engine was overhauled 10 years ago and still has great compression. This condition is primarily caused by dirty air filters, but it could also result from the incorrect fitting of after-market accessories such as exhaust systems, air filter systems, or replacement carburetors of a different type or size. I put a .019 idle jet in it, up from the stock .017, skipping the .018 because it was idling very lean. I bought my first bike 6 months ago, and a member on here was kind enough to PM me and walk me through the process. A few years ago I put in Boyer ignition. It will also cause a lean condition on the stand. It's not as hard as it sounds, and jetting can be changed in 30 minutes. I’ve had this bike over thirty years and have put plenty of point sets in it. These images are from my YZ250 OSM. Required fields are marked *. Tickeling is immediate now and the float is dead on. If you're satisfied with how it's running, that's all that really matters. Not necessarily. Your email address will not be published. The problem is it still has a bog, as if an acceleration pump is no good, which it dosen’t have. This is borderline needing to jet down, correct? The first step is to determine if you have an AIR screw that meters air, or a FUEL screw that meters fuel. It's probably backwards, but efi seems so much easier and far more accurate. I now I replaced the coils some tme in the past wih stock new ones. Copyright© ThumperTalk, Inc. - All rights reserved.ThumperTalk® is a registered trademark. Anyway, once it’s past the bog it’s on it’s way to doing 100mph with no problem. Please note, comments must be approved before they are published, Triumph Motorcycle Inspired Shirts - Choose Shirt Style / Color / Size, 1950 BSA A10 Goldenflash Motorcycle T-Shirt, BSA Vintage Empire Star Motorcycle T-Shirt, ALL ORDERS SHIP SAME DAY BEFORE 12PM (PST) - DUE TO COVID-19 EXPECT DELAYS ON ALL DOMESTIC & INTERNATIONAL DELIVERY DATES, Create Account or Log In (No Account Needed To Order), Runs better when air screw is screwed all the way out, Should you have a lean condition, you must install a larger pilot jet, Should you have a rich condition, you must install a smaller pilot jet. At least on a 4 stroke dyno tuning is the most accurate method. Do this for every 1/8th of a turn of the throttle. …… Any more? The new carb was obviously running too lean at idle. I put a .021 idle jet in it, up from the stock .017, skipping the .019 because it was idling very lean. To remedy, clean your air filter, have your mechanic check the exhaust and … Symptoms of a rich condition can be a rough running engine (sputtering), a black spark plug, a wet plug or excessive plug fouling. If you can’t find the screw, it may be hiding under a welch plug. Moving the clip and or different straight diameters will change the time it takes, at the same throttle position to 'make the run'. Need chart showing Premier Pilot Jet sizes and Number of rings for each size and lean to richness for the full spectrum of jets. This video walks you through removing them. Hopefully you don't run it this way for long, terminal for engines. Even though it ran fine in the middle possition, it runs throatyer it the richer position. If your air screw is out further than 2.5 turns, you need a leaner pilot. It has straight pipe hollow mufflers with one of those old time cheap little baffels stuck in the end.

I am thinking now, maybe the coils arn’t liking the compression load with the new carb. For example # 19 has 3 rings, does a #17 have 2 rings or 5 rings? A few years ago I put in Boyer ignition. I was thinking the bike was rich and adding to the air screw. This is the engine telling you it is happy, and it runs best at this mixture. How to "feel" when running too rich/lean? If the bike is running too rich it feels boggy on top and fouls plugs. I now am completely hooked on jetting software that allows me to figure out the correct needle height.

The pilot solved 90% of my issues, the needle refined it, and I'm old and slow so I just assume the main is right . Reset idle to recommended settings and test ride motorcycle. Check as you wait for your new jet and see that you do not have the float set too low. Liked it? Wow. I use the smallest diameter screwdriver so I generate the least amount of torque.

A pilot air screw will be located on the air box side, while a fuel screw will be located on the engine side. The problem is it still has a bog, as if an acceleration pump is no good, which it dosen’t have. leave the jetting on the rich side. Re: Am I lean or rich on the pilot jet? The pilot jet is sized correctly if the fuel screw setting falls between 2.5-3 turns out. I complete grasp the concept although I think the human factor may introduce far too many variables to keep things accurate. 19 3 rings Of coarse I have a timing light. At least on 2 strokes... A combination of knowing how the books running and plug readings let me know what my bikes up to jetting wise. It never used to bog with the old carb. I had no idea just how far it would spread though, if you do a Google search on Spanky's Jetting this article is all over the net in multiple forums. Next a plug read (color). A rich pilot setting will result in hard starting, plug fouling at low RPM’s, sputtering as the throttle is cracked opened. This symptom of a lean or rich condition is quite common on any carburetor, however, those that have the new Amal Premier carburetors or Wassell Evolution carbs will have the liberty of fine tuning the pilot circuit by swapping out the "removable pilot jets" Back on the bike, with gas going to it, I found that the tickler would bearly move the float. How-To: Size Your Pilot Jet, Pilot Screw Explained, 8 MUST Have Modifications – Harbor Freight Blast Cabinet, How-To: Prevent flash rust on metal parts, How-To: WOOD DIY Vapor Blaster Plans 42×30, How-To: MRCOOL DIY Mini Split Installation, How-To: Honda CB750 Carburetor Rebuild 1969-1976. It idles strong now with the mixture screw out 1 1/2 turns out. After trying to get the carb to run right with its other apparent issues, I finnaly yanked the tickler out of this brand new amal premiere carb because it kept hanging up and I could see that it wasn’t going down enough. How are you guys dialing in air/fuel ratios off the butt dyno? I just use the 1 to 2.5 turn "rule" because it makes it easier to explain. Out of the box, I installed it and of course it ran like crap. Way quicker and way more accurate. In addition, if the fuel level is set too high in the float chamber, a rich mixture will result. I experimented with the needle hight. The pre-school pictures awesome too , This topic comes up so often that I sat down a long time ago and wrote this up do I could just copy/paste it in jetting threads. Of coarse I have a timing light. Some finess was required to make a new flare, but anything is better than the crap they passed at the factory.

Should you find yourself in this predicament I recommend that you keep reading our Tech Tip post.. A pilot jet is a circuit (or meter) that controls the flow rate of fuel that is drawn into your carburetor, Different size pilot jets can help you achieve a rich or lean condition. When the pilot jet is way too rich, you are forced to use the idle screw to open the slide so far in order to keep the engine running that the pilot circuit is partially bypassed, and the engine is actually starting to draw fuel through the needle jet. See below. What you are after when adjusting this screw, is too reach peak idle RPM and smoothness. How do you determine the size of the jet you have? If these change, you may have to change jetting to suit. Like my articles and How-To videos? Seems clear as day, but I'll be damned if can can tell the difference sometimes. 15 1 ring Leanest? By the time I was done setting and checking throttle response, I was only 1 turn out from seat. Now, adjust between these two settings to achieve highest RPM and smoothest running engine.

Lean: A "lean" condition is what occurs when you have insufficient fuel in your mixture creating an over abundance of oxygen. A dyno run is only on the main jet, just like the dedicated plug choppers. I was thinking the bike was rich and adding to the air screw. That leaves massive amounts of needle tuning which can really only be done by the person whose bike it is. I’ve seen the pilot air screw on the engine side on most Amal carburetors. I look forward to it tho. The engine was overhauled 10 years ago and still has great compression. This condition is primarily caused by dirty air filters, but it could also result from the incorrect fitting of after-market accessories such as exhaust systems, air filter systems, or replacement carburetors of a different type or size. I put a .019 idle jet in it, up from the stock .017, skipping the .018 because it was idling very lean. I bought my first bike 6 months ago, and a member on here was kind enough to PM me and walk me through the process. A few years ago I put in Boyer ignition. It will also cause a lean condition on the stand. It's not as hard as it sounds, and jetting can be changed in 30 minutes. I’ve had this bike over thirty years and have put plenty of point sets in it. These images are from my YZ250 OSM. Required fields are marked *. Tickeling is immediate now and the float is dead on. If you're satisfied with how it's running, that's all that really matters. Not necessarily. Your email address will not be published. The problem is it still has a bog, as if an acceleration pump is no good, which it dosen’t have. This is borderline needing to jet down, correct? The first step is to determine if you have an AIR screw that meters air, or a FUEL screw that meters fuel. It's probably backwards, but efi seems so much easier and far more accurate. I now I replaced the coils some tme in the past wih stock new ones. Copyright© ThumperTalk, Inc. - All rights reserved.ThumperTalk® is a registered trademark. Anyway, once it’s past the bog it’s on it’s way to doing 100mph with no problem. Please note, comments must be approved before they are published, Triumph Motorcycle Inspired Shirts - Choose Shirt Style / Color / Size, 1950 BSA A10 Goldenflash Motorcycle T-Shirt, BSA Vintage Empire Star Motorcycle T-Shirt, ALL ORDERS SHIP SAME DAY BEFORE 12PM (PST) - DUE TO COVID-19 EXPECT DELAYS ON ALL DOMESTIC & INTERNATIONAL DELIVERY DATES, Create Account or Log In (No Account Needed To Order), Runs better when air screw is screwed all the way out, Should you have a lean condition, you must install a larger pilot jet, Should you have a rich condition, you must install a smaller pilot jet. At least on a 4 stroke dyno tuning is the most accurate method. Do this for every 1/8th of a turn of the throttle. …… Any more? The new carb was obviously running too lean at idle. I put a .021 idle jet in it, up from the stock .017, skipping the .019 because it was idling very lean. To remedy, clean your air filter, have your mechanic check the exhaust and … Symptoms of a rich condition can be a rough running engine (sputtering), a black spark plug, a wet plug or excessive plug fouling. If you can’t find the screw, it may be hiding under a welch plug. Moving the clip and or different straight diameters will change the time it takes, at the same throttle position to 'make the run'. Need chart showing Premier Pilot Jet sizes and Number of rings for each size and lean to richness for the full spectrum of jets. This video walks you through removing them. Hopefully you don't run it this way for long, terminal for engines. Even though it ran fine in the middle possition, it runs throatyer it the richer position. If your air screw is out further than 2.5 turns, you need a leaner pilot. It has straight pipe hollow mufflers with one of those old time cheap little baffels stuck in the end.

I am thinking now, maybe the coils arn’t liking the compression load with the new carb. For example # 19 has 3 rings, does a #17 have 2 rings or 5 rings? A few years ago I put in Boyer ignition. I was thinking the bike was rich and adding to the air screw. This is the engine telling you it is happy, and it runs best at this mixture. How to "feel" when running too rich/lean? If the bike is running too rich it feels boggy on top and fouls plugs. I now am completely hooked on jetting software that allows me to figure out the correct needle height.

שעות פעילות: א-ה: 8:00-17:00 ו: 8:00-14:00

Menu

Menu