Installing Intake Manifold
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Stage III
Joined: May 2007
Posts: 3
Likes: 0
RE: Installing Intake Manifold
Hey thanks for the help guys!
It's great to have a place to go where we can find help or advice. The local HD dealer is not much help and too freakin' expensive anyway. I have a local independant shop (NH Motorcycle Wharehouse, in Portsmouth, NH) that works on pre-evo Harley's and a few friends w/ shovels but there aren't any other Ironheads around.
Thanks
It's great to have a place to go where we can find help or advice. The local HD dealer is not much help and too freakin' expensive anyway. I have a local independant shop (NH Motorcycle Wharehouse, in Portsmouth, NH) that works on pre-evo Harley's and a few friends w/ shovels but there aren't any other Ironheads around.
Thanks
Stage I
Joined: Jun 2023
Posts: 1
Likes: 0
From: Florida
Nobody can't be expert to all years and models [&:] You PG are true expert when we are talking about older IH [sm=icon_cheers.gif] I personally know only little about 72-79 IH's 
but I think it's important that whole "group" support each other. This because there is very few workshops that really are willing to work with IH or older models, they don't care theese "old scoots"
-sepixlh-
but I think it's important that whole "group" support each other. This because there is very few workshops that really are willing to work with IH or older models, they don't care theese "old scoots"-sepixlh-
Last edited by BrianKayne; Jun 30, 2023 at 04:13 PM.
Advanced
Joined: Aug 2022
Posts: 80
Likes: 50
From: FL
207XL,
Personally, I wouldn't even think about loosening the heads or cylinders for a manifold alignment. I would lubricate the INSIDES of the bands before installing with just a coating of lithium grease. By the way there has to be a gap between the manifold and the head or you would not be able to install the manifold and bands. This is the reason of course why the bands are as wide as they are. Don't be in a hurry when tightening the bands. Make sure you have a good seal ALL AROUND even if you use a small mirror and a bright flashlight. Make sure when you finish tightening ( don't overtighten ) the clamps that they are facing in such a way that they are not hitting anything and are accessible to snug after the carb is installed. I did all of this when I installed the original carb on by '82. All came out great the first time. Good Luck.
Personally, I wouldn't even think about loosening the heads or cylinders for a manifold alignment. I would lubricate the INSIDES of the bands before installing with just a coating of lithium grease. By the way there has to be a gap between the manifold and the head or you would not be able to install the manifold and bands. This is the reason of course why the bands are as wide as they are. Don't be in a hurry when tightening the bands. Make sure you have a good seal ALL AROUND even if you use a small mirror and a bright flashlight. Make sure when you finish tightening ( don't overtighten ) the clamps that they are facing in such a way that they are not hitting anything and are accessible to snug after the carb is installed. I did all of this when I installed the original carb on by '82. All came out great the first time. Good Luck.
Tourer
Joined: May 2011
Posts: 469
Likes: 158
From: Alberta
The biggest issue is getting the parts of the intake that attach to the head at the right angle. I've found, at least for a HD CV40 or Mikuni 42 carb, is to grease the rubber that mates to the heads, install the intake loosely to the head ( there is a front and rear orientation of the flanges ), install the rubber donut for the carb to slide into, then mount the carb and hold it in place by bolting the backing plate to the heads. This aligns everything and then you just tighten up the flange bolts on the intake. Once you've got them tight you can remove the backing plate and carb to hook up cables etc. Once you do it once, it becomes pretty simple.
Advanced
Joined: Aug 2022
Posts: 80
Likes: 50
From: FL
207XL,
Forgot to mention that once your satisfied that the manifold and seals are correctly installed with the clamps, do not tighten until the carb is installed with the bracket that goes to the tranny case. There is a certain amount of movement with the manifold and you obviously want the best alignment of carb and manifold before final tightening.
Forgot to mention that once your satisfied that the manifold and seals are correctly installed with the clamps, do not tighten until the carb is installed with the bracket that goes to the tranny case. There is a certain amount of movement with the manifold and you obviously want the best alignment of carb and manifold before final tightening.
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