Grady 275 with Yamaha 425 - anyone do it?

mr_mbuna

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The Grady 275 was equipped with a single Yamaha F350 as standard power for several years. I'm wondering if anyone has repowered with a single F425 and what the performance results were. I'm not due for a repower but just curious about twin 200s vs. a single 425 vs. twin 250s if I ever have to.
 

lyncha00

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I'd be curious too as I have the single F350. How about upgrading the F350 to 425 with the Nizpro tune? If I didn't have a warranty...