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zsno Member
Joined: 03 Aug 2008 Posts: 16 Location: Richmond, VA BlackJack
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Posted: Sun Jul 25, 2010 12:34 am Post subject: 171 Kit, Big Valve Head, Cam, and Uni installed |
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Just got finished doing some major upgrades on my bike, figured I would post so any questions could be answered for you guys. Went with the NCY 61mm cylinder kit(cast iron), the 61mm head, and the NCY camshaft. All on a Blackjack. Also went ahead and removed the stock airbox and stuck a large uni filter directly on the carb. Jetted up from a stock 92 to 115, haven't had a lot of time with it yet. You will have to cut the second generic head cover mounting hole off of the head to make the stock cooling shroud fit, that or cut the shroud.
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Mr Miller Member
 Joined: 22 Jul 2009 Posts: 233 Location: Roseburg Oregon '09 "Voodoo Jack" 171.3cc ............... Hyosung GT250
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Posted: Sun Jul 25, 2010 4:33 am Post subject: |
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I have the same setup on my black jack, minus the NCY cam shaft. I just dropped down to a 115 jet and am finding it quite lean. I am going to try a 120 and then a 125 if it is still too lean. I started with a 130ish after I did the UNI and it was way rich:-/ let me know how the 115 works for you:)
Oh yeah what altitude are you at? I am at about 650' _________________ • 171.3cc NCY Big Bore kit
& bunch of other stuff...
http://www.facebook.com/inerseshen for graphic design, advertising, signs, decals...
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zsno Member
Joined: 03 Aug 2008 Posts: 16 Location: Richmond, VA BlackJack
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Posted: Sun Jul 25, 2010 6:02 am Post subject: |
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Im only about 75 miles from the Atlantic, don't know the exact altitiude but it's close to sea level. Put about thirty miles on it just now. Seems good so far. More to come
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zsno Member
Joined: 03 Aug 2008 Posts: 16 Location: Richmond, VA BlackJack
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Posted: Sun Jul 25, 2010 6:07 am Post subject: |
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Ok the elevation here is 166ft.
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