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Post by fusion900 on Jan 29, 2009 10:44:14 GMT -6
Hello, I am currently converting my 1976 Skiroule Laser from single to dual carbs. I understand the 1975 Nytro II has the same Kohler 440 2AS motor. Could any one provide me with the carb specs, especially the jet needle, needle jet and slide cut-away. Thanks.
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Post by Sticks on Jan 29, 2009 20:34:46 GMT -6
I think I have a set of those carbs at my shop. I'll look tomorrow and get back to you! Sticks
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Post by fusion900 on Jan 30, 2009 8:25:46 GMT -6
Thanks, races in 1 week.
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Post by rog929 on Feb 2, 2009 11:50:36 GMT -6
I have the carbs and intake flanges if you still need some. If I was you I would use trail twister intakes and 36mms. Makes a difference.
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Post by fusion900 on Feb 2, 2009 14:12:40 GMT -6
I have a set of 34's already but thanks, I have the main jet fairly close, just need the other specs. I can't find any info on the net. Races in 5 days. Please help.
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Post by daren007 on Feb 2, 2009 18:32:51 GMT -6
Slide 3.0, Pilot 35, Jet Needle 6DP1, Needle Jet P2, Main 340/270, 440/290, These jets will wake up the Nitro but keep in mind this is with the air box and tube stack in place. As for your application start with 310/320 and work down from there. dc
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Post by fusion900 on Feb 3, 2009 8:39:43 GMT -6
Thanks for the great info. You make a good point, I am not running an air box. I have 190 main jets and they seem perfect. I have a bit of a bog off the line. This is what I am trying to cure.
I also have my needle at the top clip (lean). Going to be warm for the races so I need to try lean up the bottom end a bit becaus I cannot adjust my needles any further.
My current set up with 34 mm carbs is
Main - 190
Pilot - 45
Jet Needle - 6DH7
Needle Jet - O8
Throttle Valve - 2.0
Comparing your set-up, think I will try:
Main - as above
Pilot - 35
Jet Needle - 6DP1
Needle Jet - O2
Throttle Valve - 2.5
Comments?
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Post by daren007 on Feb 3, 2009 10:26:20 GMT -6
No gurantees but this works really nice on the Nitro II dc
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Post by fusion900 on Feb 3, 2009 10:52:59 GMT -6
I have been looking for info for over a year, so any suggestions help. My sled currently runs good but it was -20 C the last day I tested it. Our forcast is for -5 C on race day. Plan on doing more testing in a couple days.
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Post by rog929 on Feb 3, 2009 14:40:03 GMT -6
Weird, all of my nitro 2 carbs and even the twister have 270 mains
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Post by daren007 on Feb 3, 2009 15:16:58 GMT -6
My notes say 290 for the K442AS but i have run 270 with success, I am always reluctant to give out jetting advise. I do not want to be held responsable for a burn down. dc
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Post by Sticks on Feb 3, 2009 18:30:13 GMT -6
I pulled my carbs today on my 75 340 nitro, and they are jetted exactly as daren007 described. I think it runs a little rich when its warm out, but it spot on when the tempitcure drops.
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Post by rog929 on Feb 5, 2009 9:15:15 GMT -6
I've run 260's in mine and held it wide open for over a half a mile at sea level. no problems, wash looked ok
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