SU carb adjustment!!
Thread Starter
|
2nd Gear
Joined: Apr 2008
Posts: 6
Likes: 0
SU carb adjustment!!
Hi all, i'm newbie here it's my first post. I rebuild my FXB 1981 and i buy a brand new SU carb. I want to know where i can find information for calibrate this carb on my shovel. Thks to all!!
$tef
$tef
Road Warrior
Joined: Dec 2007
Posts: 1,638
Likes: 0
From:
RE: SU carb adjustment!!
What do you want to know? Used to be an M.G. wrench so I understand them somewhat. I have always wanted to put one on my shovel but got convinced to try the S&S because of the way I rode [pre sidecar].
Intermediate
Joined: Mar 2008
Posts: 37
Likes: 2
RE: SU carb adjustment!!
OK ,,,first of all it it a constant velocity carb....the best design goin!!!the carb should have come pretty much set up from factory
1st,,,install as directed
2nd,,,take up the road for a ride,,,,if too lean you will notice when hard on throtle in 2nd gear...back fire thru carb,,,plugs are white
3rd...there is an main jet adjustment on the right side of carb when lookin directly at it...clockwise in is to richen it up.....counter to lean out
these are the basics.......BUT,,make sure there are no air leaks at manifold to heads...this is the biggest concern(won't be able to dial in)
next item is I find that the recomened needle size from the chart is too lean...if using chart for a starting point,,,you will have to richen it and it will be hard starting until dialed in...
I have 2 bikes running the SU,,a 93" shovel and a 88" pan...they are great carbs,,,,,,also have spares and many parts avail......I'm the local SU guy.......hope this helps
Dave
1st,,,install as directed
2nd,,,take up the road for a ride,,,,if too lean you will notice when hard on throtle in 2nd gear...back fire thru carb,,,plugs are white
3rd...there is an main jet adjustment on the right side of carb when lookin directly at it...clockwise in is to richen it up.....counter to lean out
these are the basics.......BUT,,make sure there are no air leaks at manifold to heads...this is the biggest concern(won't be able to dial in)
next item is I find that the recomened needle size from the chart is too lean...if using chart for a starting point,,,you will have to richen it and it will be hard starting until dialed in...
I have 2 bikes running the SU,,a 93" shovel and a 88" pan...they are great carbs,,,,,,also have spares and many parts avail......I'm the local SU guy.......hope this helps
Dave
Road Warrior
Joined: Dec 2007
Posts: 1,638
Likes: 0
From:
RE: SU carb adjustment!!
Got anything to replace my S&S? 9.5to1 wiescos,andrews BH,84", Alphabets exhaust and with a sidecar. If so how much and what. Thank you silvergoldsmith@yahoo.com put hdforums in subject line please.
[IMG]local://upfiles/49569/68DAF22A7E6F4A32B7E46F4C2204017E.jpg[/IMG]
[IMG]local://upfiles/49569/68DAF22A7E6F4A32B7E46F4C2204017E.jpg[/IMG]
Trending Topics
Thread Starter
|
2nd Gear
Joined: Apr 2008
Posts: 6
Likes: 0
RE: SU carb adjustment!!
Thks guy for your info. I will begin with your experience and will see how bike works...this weekend bike will be finished to mount and i will make a test road. I will keep you informed about that. Here we have a record snowfall but street is on asphalt 
See u later...
$tef
See u later...$tef
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
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
10 Motorcycles You Should Never Buy
Joe Kucinski
10 Things Harley-Davidson Needs to Fix in 2026
Verdad Gallardo
Southpaw Super Glide: A Left-Hand-Drive 1979 Harley FXE Built to Fit the Rider
Verdad Gallardo
Intermediate
Joined: Apr 2008
Posts: 35
Likes: 0
RE: SU carb adjustment!!
bikes i have --- 2006 117ci big dog-- changed the cam from a S&S 520 to a lienweber E7 575 l 298 duration-- 1979 FXE 80 ci with a REAL sifton 468S and a S&S B carb with single fire ign.. and my newest its a 1979 sportster with a set of ROBINSON THUNDERHEADS--- geezzee what a difference those heads make--- and it has a SU carb on it--- i'll have a pic of it on here soon and the sporty will be taken apart to put it back to the 1979 specs.. still with the thunderheads-- it will be up for sale--- also have this --- http://presto49.tripod.com -- for the thrill seekers FB