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Originally Posted by MadMax  I've set up a few CV40's with great results as follows .. First thing, fit a Sportster needle which is part no 27094-88. You should be fine with a 195 main using the 37's, maybe a bit too rich on the pilot though. The stock 45 will be ok or maybe a 46. I'm assuming you've taken out the little plug under the carb which covers the idle mixture screw? Wind the screw in until it bottoms lightly then back it out about 2 1/2 turns then when the motor's warm you can adjust your idle speed. These settings should get you crisp throttle response & good mileage. I've never used any of the kits available so can't say how to use them .. |
+1 All good advise there, chances are its iffy low down with that 48 in it.
Like the man says 45 or 46 should be fine.
Turn the mixture screw both ways from the two turns until it starts to run rough and set it in the middle of the two and your good to go.