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XR Sportster Motorcycle Talk - XR750, XR1000, XR1200 For XR Sportsters: XR750, XR1000, XR1200

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  #1  
Old 28th January 2018
LiquidGold LiquidGold is offline
Biker
 
Join Date: Jan 2018
Posts: 5
Sportster/Buell Model: XR1000
Sportster/Buell Year: 1983
Other Motorcycle Model: 2008 Dyna Superglide
Reputation: 10
LiquidGold is an unknown quantity at this point
Default I got a free XR1000. Looking for Jetting info for Mikuni VM38 ROUND SLIDE

Good evening Gentlemen,
I'm brand new to this forum. Spent the last week reading as many threads as I could on the XR and any Mikuni Carb threads.
I buy,improve and sell houses for a living. My most recent purchase came with 3 motor cycles. A 1985 Yamaha VMAX (first year with the VMAX), 2008 HD Dyna Superglide 3,200 Miles, 1983 XR1000 4,100 miles all stock except the carbs.

I'm selling the other but thinking of keeping the XR. I don't know how long the XR sat. Mikuni VM38-9 round slide carbs. One of the slides was stuck and I freed it with a heat gun. Removed all carbs parts and socked in gallon of carb cleaner. Used rebuild kit to put carbs back together and struggled to start the bike without giving it throttle. Choke would not start bike without throttle.
Spoke with a harley repair man and he said to get 2 new carbs because the old gas had probably eaten away the current carbs.
Just ordered two new Mikuni VM38 Round Slide carbs.

THE BIG QUESTION! Does anyone have advice on the jetting/needle I should start with?

The VM 38 carbs that came with the non starting bike were jetted:
Needle - 6DH3
Slide - 2.0
Air Jet - 1.0
Main Jet 290
Pilot Jet - 20
Needle Jet - P5

The jetting that comes installed with the newly ordered VM38:
Air Jet - .5
Main Jet - 330
Pilot Jet - 30
Needle Jet - Q2


Would you start with the factory jets or the current owners jets? Current owner is deceased and I never met or spoke with him (Zero info on Bike)
I know I'm new here and don't know 1/100 of the stuff this board knows. Any help is much appreciated. Thank you
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  #2  
Old 28th January 2018
CT XR rider CT XR rider is offline
Master Mechanic
 
Join Date: Nov 2009
Posts: 288
Sportster/Buell Model: XR 1200
Sportster/Buell Year: 2009
Sportster/Buell Model #2: XR 1000
Sportster/Buell Year #2: 1983
Reputation: 14897
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Default

Wow...congrats on getting a XR1000, quite a rare animal, only about 1700 units produced in 1983 and half of 1984.
I'm sorry I can't help with the mikuni jetting, I might attempt to use the jets from the old mikunis and see if there is any difference.
Would love to see some pictures, once you get it sorted out, not much activity in this section of the forum, hopefully someone with some carb tuning experience will stop in and offer some solutions.
Regards
Roy
Edit*** there is also a Sportster intake and exhaust section of the forum, where you might get more responses, might be worth a try!

Sent from my iPad using Tapatalk HD
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  #3  
Old 28th January 2018
Bob F's Avatar
Bob F Bob F is offline
XLF LIFEMEMBER Im retired
 
Join Date: Feb 2007
Location: Pittsburgh, PA
Posts: 14,408
Sportster/Buell Model: XL50 0596 Black
Sportster/Buell Year: 2007
Other Motorcycle Model: E-Glide
Other Motorcycle Year: 2003
Reputation: 886328
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Default

Welcome to the XLForum.

Quote:
Spent the last week reading as many threads as I could on the XR and any Mikuni Carb threads.
Have you found this stick yet? This is the sum total of everything there is to know about a Sporty carb.

http://xlforum.net/forums/s...d.php?t=642408
__________________
Bob, a glutton and a winebibber, a friend of bartenders and sinners!
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  #4  
Old 28th January 2018
CT XR rider CT XR rider is offline
Master Mechanic
 
Join Date: Nov 2009
Posts: 288
Sportster/Buell Model: XR 1200
Sportster/Buell Year: 2009
Sportster/Buell Model #2: XR 1000
Sportster/Buell Year #2: 1983
Reputation: 14897
CT XR rider is a glorious beacon of lightCT XR rider is a glorious beacon of lightCT XR rider is a glorious beacon of lightCT XR rider is a glorious beacon of lightCT XR rider is a glorious beacon of lightCT XR rider is a glorious beacon of lightCT XR rider is a glorious beacon of lightCT XR rider is a glorious beacon of lightCT XR rider is a glorious beacon of lightCT XR rider is a glorious beacon of lightCT XR rider is a glorious beacon of light
Default

We're there any other parts, in boxes or anything, near the bike?
The stock carburetors were Delorto's
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  #5  
Old 29th January 2018
LiquidGold LiquidGold is offline
Biker
 
Join Date: Jan 2018
Posts: 5
Sportster/Buell Model: XR1000
Sportster/Buell Year: 1983
Other Motorcycle Model: 2008 Dyna Superglide
Reputation: 10
LiquidGold is an unknown quantity at this point
Default

BoB F thanks a lot I will comb through and read that stick.

CTXR rider - Someone cleaned out everything except the bikes and some very interesting bullet making equipment. Basically they left the heavy stuff. I have 0 information. The one thing I do know is the front carb was partially dissembled when I arrived.
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  #6  
Old 6th February 2018
LiquidGold LiquidGold is offline
Biker
 
Join Date: Jan 2018
Posts: 5
Sportster/Buell Model: XR1000
Sportster/Buell Year: 1983
Other Motorcycle Model: 2008 Dyna Superglide
Reputation: 10
LiquidGold is an unknown quantity at this point
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