Pilot jet?
Extreme HDF Member
Joined: Sep 2010
Posts: 14,744
Likes: 402
From: Phoenix '53, '88, '09 Big Twins
a more open intake may let you hear the pulses in the exhaust tract moving up and through the cylinders during the period when both valves are open...
what I'm saying is maybe you don;t have a problem.
use you leg to block between the ear and intake...any change?
cam chest- use a stethoscope or even a stick or rod from cam chest to earbone- what do you hear
cam choice- make SURE that the cam you choose works with and complements the exhaust you have chosen...not all performance parts work well together.
no use buying a $600 pipe and $400 cam job if you end up running like crap
tuning the cv carb is pretty easy-but you have to understand the function of each circuit- see post #2
Mike
Cruiser
Joined: Aug 2015
Posts: 164
Likes: 9
From: Houston
some riders are thrown off by intake noise after removing the muffled stock intake.
a more open intake may let you hear the pulses in the exhaust tract moving up and through the cylinders during the period when both valves are open...
what I'm saying is maybe you don;t have a problem.
use you leg to block between the ear and intake...any change?
cam chest- use a stethoscope or even a stick or rod from cam chest to earbone- what do you hear
cam choice- make SURE that the cam you choose works with and complements the exhaust you have chosen...not all performance parts work well together.
no use buying a $600 pipe and $400 cam job if you end up running like crap
tuning the cv carb is pretty easy-but you have to understand the function of each circuit- see post #2
Mike
a more open intake may let you hear the pulses in the exhaust tract moving up and through the cylinders during the period when both valves are open...
what I'm saying is maybe you don;t have a problem.
use you leg to block between the ear and intake...any change?
cam chest- use a stethoscope or even a stick or rod from cam chest to earbone- what do you hear
cam choice- make SURE that the cam you choose works with and complements the exhaust you have chosen...not all performance parts work well together.
no use buying a $600 pipe and $400 cam job if you end up running like crap
tuning the cv carb is pretty easy-but you have to understand the function of each circuit- see post #2
Mike
will allow it. I am open to suggestions. Taking it to the shop tomorrow.
Seasoned HDF Member
Joined: Apr 2012
Posts: 9,984
Likes: 5,222
From: Michigan
I had an '87 Softail Custom with the EVO carbed engine and I soon discovered that I had an intake (seal) leak. Mostly a rough idle.
New seals are relatively cheap but with a few tools you can change them yourself fairly easy and it's worth the effort.
The earlier EVO's were prone to leaky gaskets and it wasn't long before my base gaskets started leaking. I changed the high speed jet to compensate for the leaner AFR and it did run better but it used a little more fuel too.
If I had kept the bike I would have had the base gaskets but it was time for a new bike.
New seals are relatively cheap but with a few tools you can change them yourself fairly easy and it's worth the effort.
The earlier EVO's were prone to leaky gaskets and it wasn't long before my base gaskets started leaking. I changed the high speed jet to compensate for the leaner AFR and it did run better but it used a little more fuel too.
If I had kept the bike I would have had the base gaskets but it was time for a new bike.
Seasoned HDF Member
Joined: Dec 2005
Posts: 19,944
Likes: 8,039
From: poway
That bike with that pipe will likely need a little more juice down low.. Might even want to go up on the main 1. I'd pull the pilot and check it's size.. if it's a 45 or 46 go up one size (46/48). Also you can toss a washer under the slide needle.. I like to use aluminum pop rivet washers that are about 0.030 to 0.040 thick.. One or both of these changes will help with that pipe.
BTW 46 is a non standard HD pilot size so you may have to try the 48 if you got the 45.
BTW 46 is a non standard HD pilot size so you may have to try the 48 if you got the 45.
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