Carb
Road Master
Joined: Apr 2009
Posts: 1,123
Likes: 43
From: NJ
If your running your bike around the street at 5 grand+, you might feel a difference-(see the chart attached)-@6500rpms the Mikumi yields 2.5HP more...yippee.
An engine is an air machine, if both types of carbs are properly tuned then the only difference in power will be from the 2mm bigger bore of the Mikuni. Some say the Mikuni has better throttle responce, maybe it does but I never noticed a big difference. Poor throttle responce can be caused by a number of things, for example a too fat highspeed circuit will cause an engine to bog down under high throttle settings, no matter what carb you use.
I'm not knocking the Mik or S&S, I just don't see a compelling reason to throw money at them unless your CV is totally screwed up. You would be better served putting that 300 bucks into a new cam(s) and then doing a proper CV rejet, that would put some actual horses at the rear tire.
D
An engine is an air machine, if both types of carbs are properly tuned then the only difference in power will be from the 2mm bigger bore of the Mikuni. Some say the Mikuni has better throttle responce, maybe it does but I never noticed a big difference. Poor throttle responce can be caused by a number of things, for example a too fat highspeed circuit will cause an engine to bog down under high throttle settings, no matter what carb you use.
I'm not knocking the Mik or S&S, I just don't see a compelling reason to throw money at them unless your CV is totally screwed up. You would be better served putting that 300 bucks into a new cam(s) and then doing a proper CV rejet, that would put some actual horses at the rear tire.
D
Last edited by Doug S; May 15, 2011 at 11:55 AM.
Road Warrior
Joined: Mar 2007
Posts: 1,396
Likes: 146
From:
The CV is a great carb. Properly tuned it's hard to beat. A Mikuni HSR is a fantastic carb. Miks are way more adjustable than the CV, but do you need that on a stock Twin Cam? You won't gain much between the two, if both are set up right, until you start modding the engine. Then the Mikuni is "the only way to go."
Seasoned HDF Member
Joined: Nov 2007
Posts: 6,790
Likes: 10
From: Hawaii
I'm not tryig to start anything Doug and I see your point but I did notice a huge difference in performance and trottle response... may because its a flat-slide carb? I just know I'm really happy with running the Mikuni and through my experience it made a world of difference.
Road Captain
Joined: Mar 2008
Posts: 712
Likes: 55
From: Punta Gorda, Florida
If your running your bike around the street at 5 grand+, you might feel a difference-(see the chart attached)-@6500rpms the Mikumi yields 2.5HP more...yippee.
An engine is an air machine, if both types of carbs are properly tuned then the only difference in power will be from the 2mm bigger bore of the Mikuni. Some say the Mikuni has better throttle responce, maybe it does but I never noticed a big difference. Poor throttle responce can be caused by a number of things, for example a too fat highspeed circuit will cause an engine to bog down under high throttle settings, no matter what carb you use.
I'm not knocking the Mik or S&S, I just don't see a compelling reason to throw money at them unless your CV is totally screwed up. You would be better served putting that 300 bucks into a new cam(s) and then doing a proper CV rejet, that would put some actual horses at the rear tire.
D
An engine is an air machine, if both types of carbs are properly tuned then the only difference in power will be from the 2mm bigger bore of the Mikuni. Some say the Mikuni has better throttle responce, maybe it does but I never noticed a big difference. Poor throttle responce can be caused by a number of things, for example a too fat highspeed circuit will cause an engine to bog down under high throttle settings, no matter what carb you use.
I'm not knocking the Mik or S&S, I just don't see a compelling reason to throw money at them unless your CV is totally screwed up. You would be better served putting that 300 bucks into a new cam(s) and then doing a proper CV rejet, that would put some actual horses at the rear tire.
D
Road Master
Joined: May 2007
Posts: 899
Likes: 10
The Mikuni HSR 42 or 45 (depending on HP) are the best carbs out there, IMHO. S&S, for sure, makes great stuff but their carb tech is old, and you might as well run a CV. And I just find the Mikuni is easier to tune on the off chance it doesn't run perfect right out of the box, which 99% of them do . . .
Tourer
Joined: May 2010
Posts: 315
Likes: 0
From: Sierra Nevadas
Mikuni 42 on my 95". Better throttle response than I ever got out of a cv or S&S
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