Free tuning tweak
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Seasoned HDF Member
Joined: Dec 2010
Posts: 7,736
Likes: 1,524
From: Coromandel Peninsula New Zealand
Free tuning tweak
I posted this in the Dyna forum but I know some of y'all don't go there so I reproduced it here for you.
All mass produced vehicles have stuff that works against the efficient running of the motor.
On a Harley the most obvious of these is the inlet manifold. If you hold the throttle open and push up the slide you can shine a light down the carby throat and see if any of the manifold is obstructing the airflow.....if you can see aluminium shining back at you around the join between carby and manifold then it is causing a hinderance to good flow.
Take the carby off and stuff the manifold with rags. Get a big blob of grease and smear it all over the rags where they sit in the manifold near to the material you need to remove.
Get a good, sharp half round file and take out the excess material. Keep checking at intervals by fitting the carby loosely back on and shining the light down the hole.
When its done, wipe the area where the filings are stuck to the grease, then pull the rags out and wipe the whole area clean.
Refit carby and go for a ride, I guarrantee you will feel a difference in the response to the throttle.
Costs nothing, makes you smile....won't give you 100HP but hey, its free!
__________________
All mass produced vehicles have stuff that works against the efficient running of the motor.
On a Harley the most obvious of these is the inlet manifold. If you hold the throttle open and push up the slide you can shine a light down the carby throat and see if any of the manifold is obstructing the airflow.....if you can see aluminium shining back at you around the join between carby and manifold then it is causing a hinderance to good flow.
Take the carby off and stuff the manifold with rags. Get a big blob of grease and smear it all over the rags where they sit in the manifold near to the material you need to remove.
Get a good, sharp half round file and take out the excess material. Keep checking at intervals by fitting the carby loosely back on and shining the light down the hole.
When its done, wipe the area where the filings are stuck to the grease, then pull the rags out and wipe the whole area clean.
Refit carby and go for a ride, I guarrantee you will feel a difference in the response to the throttle.
Costs nothing, makes you smile....won't give you 100HP but hey, its free!
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Seasoned HDF Member
Joined: Aug 2007
Posts: 8,205
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From: NW AR
If the carb is off, take the manifold off too. It's only a couple more bolts and you don't have to mess with rags and grease. I have found those ball end allen wrenches to be serious time savers for the intake bolts (cap screws).
My S&S intake needed some cleaning up too. The Screaming Eagle intake I had before that was pretty good.
My S&S intake needed some cleaning up too. The Screaming Eagle intake I had before that was pretty good.
Thread Starter
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Seasoned HDF Member
Joined: Dec 2010
Posts: 7,736
Likes: 1,524
From: Coromandel Peninsula New Zealand
If the carb is off, take the manifold off too. It's only a couple more bolts and you don't have to mess with rags and grease. I have found those ball end allen wrenches to be serious time savers for the intake bolts (cap screws).
My S&S intake needed some cleaning up too. The Screaming Eagle intake I had before that was pretty good.
My S&S intake needed some cleaning up too. The Screaming Eagle intake I had before that was pretty good.
we do things different down in the Southern Hemisphere...so many sheep, so little time 
Seasoned HDF Member
Joined: Aug 2007
Posts: 8,205
Likes: 3,091
From: NW AR
Don't have to take the tank off on my bike. Just got to get in there with the wrenches, and the ball end things are a great invention. And my way, you can use the Dremel brand Moto-Tool and clean up the casting marks on the inside too.
Have Phun with them sheep.
Have Phun with them sheep.
Seasoned HDF Member
Joined: Aug 2008
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From: Ohio
The rednecks in the states don't kiss the sheep, you might be able to cover more ground if your not so passionate with your ladies
Road Master
Joined: Jun 2009
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From: Beautiful SW Missouri Ozark Mountain Country
The rednecks might not, but the hillbillies do. Wait...... maybe it's sisters they're kissin'.
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