Mikuni 42mm or 45mm?
Thread Starter
|
Cruiser
Joined: Jul 2006
Posts: 102
Likes: 0
From: Tomball, Tx
Mikuni 42mm or 45mm?
I have an '05 Screamin Eagle 103B with a CV carb and the only upgrades so far are air (Heavy Breather) and V&H's. I have decided to make a change to a polished Mikuni. I can get a 45mm now, polished 42's are on back order with no projected availability date. I am having yet another round of carb issues and am ready to make the change asap.
I have read conflicting views...some saying 45 is great for this motor, some saying I will lose low-end, around town performance (mainly torque) and that the 42 would be better (would I really notice a difference?).
Any feedback would be appreciated.
I have read conflicting views...some saying 45 is great for this motor, some saying I will lose low-end, around town performance (mainly torque) and that the 42 would be better (would I really notice a difference?).
Any feedback would be appreciated.
Outstanding HDF Member
Joined: Jun 2014
Posts: 3,185
Likes: 189
From: 90210
I would do a 42. I'd only do a 45 if your valves and head were modified to support the larger flow, higher compression, bigger cams etc. Too big of a carb will indeed kill your performance and gas mileage. JMHO.
Outstanding HDF Member
Joined: Jun 2014
Posts: 3,185
Likes: 189
From: 90210
Member opinions aside, you should call Hillside Cycle and ask them- They are good guys and will typically help a brother out with a quick tech question. This would be a good "no questions" source of info.
Outstanding HDF Member
Joined: Jun 2014
Posts: 3,185
Likes: 189
From: 90210
BTW there are a lot of Mikuni HSR 42's on ebay right now (I just looked)- About $500 for a polished unit. Or buy one not-polished for a lot less and have a local polisher put a shine on it for $50.
http://www.ebay.com/sch/i.html?_odkw...ished&_sacat=0
http://www.ebay.com/sch/i.html?_odkw...ished&_sacat=0
Thread Starter
|
Cruiser
Joined: Jul 2006
Posts: 102
Likes: 0
From: Tomball, Tx
BTW there are a lot of Mikuni HSR 42's on ebay right now (I just looked)- About $500 for a polished unit. Or buy one not-polished for a lot less and have a local polisher put a shine on it for $50.
http://www.ebay.com/sch/i.html?_odkw...ished&_sacat=0
http://www.ebay.com/sch/i.html?_odkw...ished&_sacat=0
Road Master
Joined: Oct 2008
Posts: 970
Likes: 19
From: Philippines
The 42 with minor adjustments should be perfect. You may have to increase the idle jet one or two sizes. You can pick up Jets through JP Cycles. Additionally I recommend Not using the Harley CV Choke. Use the Mikuni choke also available from JP.
Tourer
Joined: Aug 2008
Posts: 282
Likes: 4
From: Vancouver, Wa
Have you thought about a Woods carb? On their website they claim better fuel mileage with increased hp. Just a thought.
Trending Topics
Cruiser
Joined: Jul 2013
Posts: 243
Likes: 6
From: Texas
I agree 100%. Tell woods what all has been done to your motor and get a woods cv carb made to your motor. By the way what carb troubles are you having?
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
6 Weirdest Harley-Davidsons Ever Sold to the Public
Verdad Gallardo
7 Times Harley-Davidson Chucked Tradition Out the Window
Verdad Gallardo
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Verdad Gallardo
8 Best Harley-Davidson Motorcycles Ever
Pouria Savadkouei
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Verdad Gallardo
Thread
Thread Starter
Forum
Replies
Last Post
parts eeter
Dyna Glide Models
41
Jul 30, 2014 01:27 PM