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Old 25-07-2013, 11:17 PM   #1
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Join Date: Jun 2010
Posts: 16
Yam 20hp tuning advice

Hi there thanks for reading I have a yamaha 2cyl 20hp 2 stroke engine, it's the 20d model
I know it's the same block as the 25n only differences from the parts lists are the carbs and exhaust extension, though the main jet remains the same

The engine is on a 3m zapcat so sticking a heavier 3cyl motor on isnt an option

The carbs are 250 each and the exhaust 79

Was just wondering what I could do to increase the hp cheaper can I up jet it and fit the 25 exhaust?

Opinions ideas other than pay 500 for a pair of carbs?

It's already propped correctly running a power tech sea worked prop at the correct wot for the motor

Many thanks
Supremesoundz is offline   Reply With Quote

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