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03-08-2006, 09:53 PM #16Junior Member
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Do the finger ports help to get the intake air in motion, or is it to get anouther place to pull more fuel in?
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03-09-2006, 04:06 AM #177000 RPM
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pulls more air fuel mix,
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03-10-2006, 07:34 PM #18Junior Member
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Thanks everyone!
Are wisco pistons the way to go?
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05-26-2020, 11:39 AM #19New Member
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I have a 70 Yamaha 2 stroke , I put 90 carbs , hydrotec head , 155 main jets , I still have 2.33 gears , what are my options to run taller gears ? Thanks for any input
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12-12-2020, 07:45 PM #20Junior Member
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Yes, I heard the 2.0:1 gears from the 90hp will fit in the 70hp case. Not 100% sure though.
Also, there are the small lowers like the one that came with the 70CES and some other Yamaha motors.