Mikuni vs Stocker CV
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Road Captain
Joined: Jun 2014
Posts: 508
Likes: 31
From: California
Mikuni vs Stocker CV
Thoughts on swapping CV for a Mikuni 42mm? So far the only engine work I have is an S&S ez start cam, intake + pipe.
I know my MPG may take a hit but what sort of actual performance gains can I expect?
I know my MPG may take a hit but what sort of actual performance gains can I expect?
Road Captain
Joined: Mar 2010
Posts: 676
Likes: 2
From: Glendale, AZ
This is my opinion, since I have not done it, but you are going to gain little to nothing. The main difference will be the adjustability you will gain when you DO make more significant modifications. YOu would have to go with some performance cams / head work / big bore kit, to justify the change. If you LIKE to make meticulous changes in tuning...go for it. If you are a casual user...keep the CV.
Advanced
Joined: Oct 2009
Posts: 85
Likes: 5
From: Vancouver B.C.
I had one on my EVO and the difference is like night and day.
One drawback is slide rattle at idle which got worse over time...but that doesn't effect performance.
It's a quality carb. Go for it.
Ultimate HDF Member
Joined: Apr 2008
Posts: 5,384
Likes: 12
From: Out on Deranged
I have never heard anything bad about mikuni from cars to motorcycles, nothing but good. Will you experience added performance on a stage one bike "not much if any- just as DesertDyna said. My example is " you can't stuff extra hay in a horse's mouth and expect him to run faster or pull more weight ".
Outstanding HDF Member
Joined: Aug 2010
Posts: 2,386
Likes: 15
From: The City Of New York
Had a 2001 FLHT with the stock CV carb. Spent countless hours, weeks, trying to get it dialed in. I came across a sale for the Mikuni EZ42 kit. Well, I set the idle and that was it! The slide rattle never bothered me. The performance and throttle response was night and day.
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Grand HDF Member
Joined: May 2007
Posts: 3,870
Likes: 499
From: Alberta
Let me be the dissenting opinion. Night and day may be a slight exaggeration...I've had 5 engines built with CV's and was happy with the smooth response on all of 'em. Bro had a Mik42 "sold" to him and it's back in the box heading for ebay. It leaked gas from a stuck float needle and frankly did not provide any big-deal improvement. I'd like to see a dyno slip or a time slip with no other changes to the bike...haven't found anything statistcally proving the claims made by the owners. I do know indy's can't sell SE stuff; so far more margin for them on a Mik swap...just saying
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Cruiser
Joined: Apr 2013
Posts: 175
Likes: 1
From: parma, Ohio
I just put one on my bike. Only stage one stuff, and not tuned yet. Droppin later this week to get tuned.
I didn't plan on puttin it on until later after engine work. But then my 14yr old carb needed a rebuild and instead of paying for that on something i didnt plan on keepin in the long run, i decided to get the mikuni.
Everything i have read is that everyone noticed better throttle response. Thats the main thing. It's not like you are gonna bolt it on and gain 15hp.... if you plan on engine work later, it will pay off in the long run.
I didn't plan on puttin it on until later after engine work. But then my 14yr old carb needed a rebuild and instead of paying for that on something i didnt plan on keepin in the long run, i decided to get the mikuni.
Everything i have read is that everyone noticed better throttle response. Thats the main thing. It's not like you are gonna bolt it on and gain 15hp.... if you plan on engine work later, it will pay off in the long run.
It's amazing how many people comment without knowing a damn thing they're talking about.
as stated, the flat slide mikuni is a preferred carb for everything from dirt bikes to harleys. it's a great carb.
will you snap your head back just on the carb swap? no. but overall performance and rideability will improve
as stated, the flat slide mikuni is a preferred carb for everything from dirt bikes to harleys. it's a great carb.
will you snap your head back just on the carb swap? no. but overall performance and rideability will improve