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21st April 2006
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Biker
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Join Date: Feb 2006
Posts: 50 Sportster/Buell Model: 1200R Sportster/Buell Year: 2006 Other Motorcycle Model: Yamaha RD400 Other Motorcycle Year: 1977
Reputation: 10
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taking carb off bike?
is it necessary to take the carb off the bike just to change to 42 jet to a 45?
thanks in advance - rico
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the nogs - purveyors of fine donkey rock since 2001
nogturnal.com
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21st April 2006
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Assistant Administrator
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Join Date: Nov 2004
Location: South Shore, Massachusetts
Posts: 10,220 Sportster/Buell Model: 1212 conversion/497 cams Sportster/Buell Year: 2004
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nope. you can do it on the bike. Lots of folks here have. I'm sure some of them will chime in.
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21st April 2006
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Senior Master Custom Bike Builder
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Join Date: Feb 2005
Location: WA State
Posts: 5,763 Sportster/Buell Model: XL1200R Sportster/Buell Year: 2007
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Sportster Girl had a real good pic of how to do that.
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21st April 2006
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Senior Chief Master Mechanic 1st Class
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Join Date: Feb 2006
Location: NorCal
Posts: 1,258 Sportster/Buell Model: XLH1200 Sportster/Buell Year: '99 Other Motorcycle Model: Not yet!
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It's alot easier just to take the carb off of the bike. Most people think its a big chore, but its really not that bad. With the carb off of the bike you get a better look at everything, and you can do a better job of cleaning. It's just a couple of vacuum hoses, some throttle cables, a fuel line, and a couple other small things. Its really not that bad, but I suggest that you go buy a HD service manual if you dont already have one! 
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Nick
1999 XLH1200, Vivid Black....Trimmed cam cover, Thunderheader, Ram Flo 400, Pingel petcock, forward controls, black drag bars w/4.5" pullback risers, relocated front turn signals, Progressive fork springs, 4-piston HD front caliper, and a bunch of black powdercoated stuff!
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21st April 2006
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Senior Master Custom Bike Builder
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Join Date: May 2005
Location: Western NC
Posts: 4,980
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Quote:
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Originally Posted by ricodelfuego
is it necessary to take the carb off the bike just to change to 42 jet to a 45?
thanks in advance - rico
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Hey rico, you can leave it on. You will need a 90degree #2 Phillips screwdriver to get the bowl screws off. I would replace them with socket head allens when you replace the bowl. The stock screws are junk.
Here's a pic with the bowl off:
You will also need to drill and pull the SILVER colored mixture screw cap. NOT the brass plug. You can drill a small hole with a drill (like a stubby bit in a dremel motor) then screw a small sheet metal screw in the plug and twist it out. This will give you access to adjustment your mixture. |
21st April 2006
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Luvs me an artsy chick...
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Join Date: Nov 2004
Location: Chautauqua County, NY
Posts: 11,837 Sportster/Buell Model: 883>1200 XLH Sportster/Buell Year: 97
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All it takes is a tap on the float to give you more problems than you bargained for...
Take it off...clean it while you're at it.....
Getting to the mixture screw is the tough part...
I've had my carb off DOZENS of times, but I STILL don't work on it, on the bike...
For JUST a pilot jet change...I might....but not the first time I ever did anything to it....
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~Chuck
"entia non sunt multiplicanda praeter necessitatem"
Occam's Razor...
in English: "entities must not be multiplied beyond necessity."
My definition: "The simplest answers are the most likely"
~NRHS machined 1200 conversion, shittin and gettin...
XLF Tuning Stickies
Charging system troubleshooting
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22nd April 2006
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Senior Master Custom Bike Builder
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Join Date: Nov 2004
Location: the tropical north of Australia
Posts: 6,535 Sportster/Buell Model: 11 second 1200S Sportster/Buell Year: '98 Other Motorcycle Model: about a dozen others.....
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Quote:
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Originally Posted by ricodelfuego
is it necessary to take the carb off the bike just to change to 42 jet to a 45?
thanks in advance - rico
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no ... I don't remove the carb for jet changes... and prefert o remove the tank to do needle adjustment...
As the rubber ring that the carb sits at the inlet manifold tends to get a set in it and if it's over 6 months old will often require changing.....
To keep removing and replacing the carb without changing the rubber ring is a recipe for problems...
HOWEVER...... it's a good idea to remove it the first time to give you a better view of where everything is.... just replace the rubber if it's over 6 months old or feels hard or shows an indent from where the carb sits .. and use a bit of silicon grease on it when ya put the carb back in....
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Havin a few beers in the shed with my mates.
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22nd April 2006
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Rider Of The Iron Steed
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Join Date: Dec 2003
Location: London, ON Canada
Posts: 31,491 Sportster/Buell Model: XLH Sportster/Buell Year: 1978
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IMO it is a bad idea for a carb newbie to work the carb in the bike. It is an easy job to remove it. There is the float system which can easily be disturbed. There are the jets etc that are made of brass == soft. There are bolts and jets which may be very difficult to remove. This all calls for working on the bench.
To repeat: IMO it is a bad idea for a carb newbie to work the carb in the bike. It is an easy job to remove it.
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