Jetting troubles!
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Stage III
Joined: Apr 2020
Posts: 3
Likes: 2
From: Illinois
Jetting troubles!
Hey everyone. I'm new to Harleys and absolutely suck with carburetors. I just got a 96 883 with a 1200 conversion.
I'm getting ready to put on a spiked air cleaner with a K&N filter and a 2" straight down drag pipe setup. Does anyone have just a place to start with jetting to cope with that setup? baffles for the exhaust system that don't kill the sound but won't shake windows a mile away? Any help is greatly appreciated!
I'm getting ready to put on a spiked air cleaner with a K&N filter and a 2" straight down drag pipe setup. Does anyone have just a place to start with jetting to cope with that setup? baffles for the exhaust system that don't kill the sound but won't shake windows a mile away? Any help is greatly appreciated!
Thread Starter
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Stage III
Joined: Apr 2020
Posts: 3
Likes: 2
From: Illinois
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Well I've had a good look online and I did find one or two references to a Fuel Rail but no pictures . Perhaps you would be kind enough to enlighten both myself and the OP as to what this thing is and what it does . Thanks in advance .
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HDF Community Team
Joined: Dec 2011
Posts: 8,589
Likes: 4,019
From: San Diego, CA
I think madnss is being a bit mischievous today.
Fuel rails are part of FI systems, delivering fuel to the injectors. This virus is affecting us not only physically, but mentally as well.
+1 on a 45/175 or 180 to start.
John
Fuel rails are part of FI systems, delivering fuel to the injectors. This virus is affecting us not only physically, but mentally as well.
+1 on a 45/175 or 180 to start.
John
Last edited by John Harper; Apr 15, 2020 at 04:54 PM.
Stellar HDF Member
Joined: Mar 2006
Posts: 2,395
Likes: 153
From: Utah
I think there is a lot of myth building on rejetting... the best way, IMHO, is to:
Install an idle thumb screw and an air/fuel jet thumb screw from CV Performance plus some new plugs. Adjust the air/fuel mix to 2 or maybe 2-1/2 turns out. If it idles reasonably well and starts with the choke on, you've got that right. You can go as high as 3 turns out and as low as 1-1/2 (you won't do the lesser I don't think).
Ride the bike until it is well warm and then pull the plugs and look at them. If they are whitish (not tan) take the >set< of main and lowspeed jets that you next bought and start going up on lowspeed (until it takes off ok) and main jet until the spark plugs are tan. I don't remember the lowspeed increments but the mains go up by 5. Some people say you don't need to adjust low speed sizes if you have the air/fuel mix properly done. As someone else said, indirectly, straight through pipes don't necessarily perform as well as when they have performance baffles unless you are drag racing with a bunch of other improvements.
Or, get an older mech with experience on CV carbs and have him/her do it. It's easy to get a pig in a poke when it comes to used CV carbs, also. If you like to work on your bike then mastering a CV carb is a good thing... many hours of er... fun.
Install an idle thumb screw and an air/fuel jet thumb screw from CV Performance plus some new plugs. Adjust the air/fuel mix to 2 or maybe 2-1/2 turns out. If it idles reasonably well and starts with the choke on, you've got that right. You can go as high as 3 turns out and as low as 1-1/2 (you won't do the lesser I don't think).
Ride the bike until it is well warm and then pull the plugs and look at them. If they are whitish (not tan) take the >set< of main and lowspeed jets that you next bought and start going up on lowspeed (until it takes off ok) and main jet until the spark plugs are tan. I don't remember the lowspeed increments but the mains go up by 5. Some people say you don't need to adjust low speed sizes if you have the air/fuel mix properly done. As someone else said, indirectly, straight through pipes don't necessarily perform as well as when they have performance baffles unless you are drag racing with a bunch of other improvements.
Or, get an older mech with experience on CV carbs and have him/her do it. It's easy to get a pig in a poke when it comes to used CV carbs, also. If you like to work on your bike then mastering a CV carb is a good thing... many hours of er... fun.
Last edited by cwsharp; Apr 15, 2020 at 06:29 PM.