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Old 09-28-2005, 08:16 PM   #1
krazie680
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Does anyone know the stock jet sizes for a 91 indy 400. Thanks
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Old 09-29-2005, 04:10 PM   #2
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I looked up the stock jets for the mikuni vm34 carb and it uses 330 mains and 35 pilots is this right?
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Old 10-01-2005, 06:22 AM   #3
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My master repair manual says that the pilot jet is 30 but you are correct on the mains being 230.
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Old 10-01-2005, 08:28 AM   #4
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230 or 330
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Old 10-01-2005, 10:59 PM   #5
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1990-1991 Indy 400
Main Jet will change with temperature and elevation.. here's an example

1000-3000 feet elevation
-40 to -20 = 240
-20 to 0 = 230
0 to +20 = 220
+20 to +40 = 210
+40 to +60 = 200

VM34SS
Main- 230
Pilot- 30
Jet needle/clip position- 6DP17/3
Needle Jet- Q-2
Throttle Valve Cutaway- 2.0
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Old 10-03-2005, 07:37 AM   #6
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Ahh awesome, Thanks
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