New Carb Suggestions?
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Tourer
Joined: Jun 2012
Posts: 365
Likes: 18
From: Cheyenne, WY
New Carb Suggestions?
I am planning on getting a new carb for my 90 softail
currently running a weber 45 dcoe 152 setup
engine is built
running domed pistons and a pretty aggressive cam
(sorry for the lack of description on the motor, just stating what the owner told me, wish i knew more but dont feel like cracking into the block as of just yet)
from what ive read the s&s have a noticable flat spot in the mid range
so i am looking at a mikuni
with the size of carb i am running now and the motor build
i am looking at a hsr 45 or 48
any suggestions?
thanks!
currently running a weber 45 dcoe 152 setup
engine is built
running domed pistons and a pretty aggressive cam
(sorry for the lack of description on the motor, just stating what the owner told me, wish i knew more but dont feel like cracking into the block as of just yet)
from what ive read the s&s have a noticable flat spot in the mid range
so i am looking at a mikuni
with the size of carb i am running now and the motor build
i am looking at a hsr 45 or 48
any suggestions?
thanks!
Not sure what bore is going to properly suit your cfm requirments,but ive worked on every config mikuni for snowmobiles over the last 30 years from 250cc to 1200 turbo 'd applications.
I prefer a direct slide lift over vacuum any day.
far more responsive in my estimation unless you want to go to efi.
Incredibly simple to setup.
And if it came to efi, running a dimsport rapid bike unit has the ultimate in controllability.
I prefer a direct slide lift over vacuum any day.
far more responsive in my estimation unless you want to go to efi.
Incredibly simple to setup.
And if it came to efi, running a dimsport rapid bike unit has the ultimate in controllability.
Road Warrior
Joined: Jun 2009
Posts: 1,687
Likes: 9
From: SoCal & West TN
When I wanted a new carburetor on my 1989, the CV was the best.
The Harley CV Carburetor can't be beat.
You can re-jet it for any size you want.
Harley also has a Screaming Eagle Big Bore CV.
The CV will adjust to changes in elevation.
The Harley CV Carburetor can't be beat.
You can re-jet it for any size you want.
Harley also has a Screaming Eagle Big Bore CV.
The CV will adjust to changes in elevation.
Stellar HDF Member
Joined: Apr 2009
Posts: 3,039
Likes: 11
From: Northern Ontario
I totally agree cv all the way, then again I'll be honest and say I have no direct knowledge of the S&S or mikuni. I got excellent results with Dales Killer Carb and even after tweaking what he gave me I'm going back to his innitial setup.
Seasoned HDF Member
Joined: Aug 2008
Posts: 5,070
Likes: 2,114
From: Ohio
CV is rock solid and overall a great carb, recently ran a modded CV for 2 years and no problems on a above average running engine but installed a Mikuni 45 and give the nod to the Mikuni. Go with the 42 because the 45 needs a Super E type spigot manifold and expensive plus harder to find, the bigger manifold also will be larger than your intake ports and will have a step for the flow to go thru. The 42 will fit on a standard CV spigot manifold and a dime a dozen as a Twinkee intake will fit on your Evo, just need to block off the map sensor hole.
Will need the air filter backing adapter to get a Screamin Eagle or other style air filter assembly on that Mikuni but don't shy away from a smokin deal on a CV as you can't go wrong with either but for performance, the Mikuni.
PS The larger S&S flange type manifold for the 45 with the spigot adapter creates alot of clearance problems so buy a correct manifold if you do decide to try a 45, trust me on this one.
Will need the air filter backing adapter to get a Screamin Eagle or other style air filter assembly on that Mikuni but don't shy away from a smokin deal on a CV as you can't go wrong with either but for performance, the Mikuni.
PS The larger S&S flange type manifold for the 45 with the spigot adapter creates alot of clearance problems so buy a correct manifold if you do decide to try a 45, trust me on this one.
Last edited by 1997bagger; Jun 4, 2012 at 10:03 PM. Reason: 3rd grade education
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The idle circuit is static,relying on the pilot jet size and a given amount of air,and not the atmospheric activity the thinner air has on raising or lowering the slide (which also raises the needle in the main jet).
The thinner atmosphere raises the slide less which is what helps the cv work better in lower air density.
The pilot jet works independently.
The thinner atmosphere raises the slide less which is what helps the cv work better in lower air density.
The pilot jet works independently.
Last edited by vincentostapowich; Jun 4, 2012 at 11:55 PM.