S&S jet suggestions
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Cruiser
Joined: Jun 2011
Posts: 138
Likes: 1
From: Juneau, AK
S&S jet suggestions
Alright a quick questions for you carb gurus out there. I'm currently running a Super E with jet sizes:
Main .072
Intermediate .0295
I have a lot of popping under deceleration, but not when at an idle and snapping throttle. I have an EV27 cam, stock heads, stock bore. My exhaust is Paughco upswept drag 1 3/4" with torque cones. What would you suggest I change my jets too to help with my popping and get the best performance out of my set up? Another bit of info is I am at sea level.
Main .072
Intermediate .0295
I have a lot of popping under deceleration, but not when at an idle and snapping throttle. I have an EV27 cam, stock heads, stock bore. My exhaust is Paughco upswept drag 1 3/4" with torque cones. What would you suggest I change my jets too to help with my popping and get the best performance out of my set up? Another bit of info is I am at sea level.
Ultimate HDF Member
Joined: Jun 2007
Posts: 9,193
Likes: 494
From: Richmond, VA
I agree with grbrown. The jetting you have sounds just about dead on, or exactly what I would run on that setup. To me it sounds like either an intake or exhaust gasket leak. With the bike running, have you shot a bit of WD40, or carb cleaner at the intake manifold? If you rev it up, and look closely where the pipes meet the heads, do you see little wisps of smoke that might be coming from the exhaust ports? Thats where I would start first. Then of course the dumb stuff like is the carb just plain loose, the air filter black and clogged, ect... but those jets seem pretty darn close.
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Cruiser
Joined: Jun 2011
Posts: 138
Likes: 1
From: Juneau, AK
I'll recheck for leaks while I'm at work today. The carb has been on my bike since August 2011, but my bike has been torn down and parked while I was rebuilding this winter so honestly probably only has about 200 miles with carb on it. I'll recheck the bolts and what not, I just put new intake seals, and exhaust gaskets on as well, I'll double check those and post an update
Cruiser
Joined: Dec 2008
Posts: 214
Likes: 0
From: Peterborough, Canada
I have the same carb, jets, and cam, with 9:5 to 1 pistons and V&H big radius 2 into 2, with the strait thru baffles. If I have the baffles in, all is well on the de-cel, with them removed, I get a lot of reverberation and poping on the de-cel, so it could be what grbrown said, or it could be your pipes, need a little something, something to calm your deceleration down.
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Cruiser
Joined: Jun 2011
Posts: 138
Likes: 1
From: Juneau, AK
Update: I hooked it up to my smoke machine at my work (I'm a auto mechanic) and no leaks out the exhaust or the intake. I took it on another ride and I think I might just be paranoid. There is the occasional pop but mostly just exhaust noise on deceleration. Occasionally I hear a cough out the carb. An I just being to paranoid, after all this is my pride and joy
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Cruiser
Joined: Jun 2011
Posts: 138
Likes: 1
From: Juneau, AK
Sorry one more thing... I pulled the air cleaner to gain access to my vacuum port on the intake and a small amount (very small) of oil was hanging out in housing, is this okay? I know in cars a small amount is acceptable
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Cruiser
Joined: Dec 2008
Posts: 214
Likes: 0
From: Peterborough, Canada
That's probably all it is, I love the sound my pipe make on the de-cell with the baffles out, but it's just a little to loud for daily driving around here
And yes, the oil is normal, I run a hose from the vent tubes in the head; down to the bottom of the bike, instead of to the air cleaner, because my air cleaner housing was always dripping oil after a long ride.
And yes, the oil is normal, I run a hose from the vent tubes in the head; down to the bottom of the bike, instead of to the air cleaner, because my air cleaner housing was always dripping oil after a long ride.
Last edited by Silver Ghost; Feb 16, 2012 at 08:01 PM.
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