Yamaha Octane build

lamey went with the 86mm because its a readily available piston with a couple of overbores, he doesn't like to go over 88 because he has had piston failure with stroker cranks. I bought some gp1200r riva heads on ebay for cheap and had them flycut to fit this motor, i now have .045 squish and 210lb of compression. The powervalves are adjusted and installed, just have to set up the msd and this will be ready to try next week. I've always wanted to run a 66e that has been setup specifically for freestyle powerband. Dan lamey helped design the 66e motor with yamaha and of course the lamey cylinder so I'm thinking this might be a good motor
 
lamey went with the 86mm because its a readily available piston with a couple of overbores, he doesn't like to go over 88 because he has had piston failure with stroker cranks. I bought some gp1200r riva heads on ebay for cheap and had them flycut to fit this motor, i now have .045 squish and 210lb of compression. The powervalves are adjusted and installed, just have to set up the msd and this will be ready to try next week. I've always wanted to run a 66e that has been setup specifically for freestyle powerband. Dan lamey helped design the 66e motor with yamaha and of course the lamey cylinder so I'm thinking this might be a good motor

That is sweet!.... I dont think there will be any question on how much raw power that motor is gona have! :fing02:.... Its one of those things were there is no guess work involved, it is all done with a Calculator, and a shiet load of formulas I know nothing about. :headbang:
 
motor ran very very well for about 5 mins....... then it broke a piston in half. The reason i liked it so well is it rev'd much faster than my other 66e motor. I can blame the failure to several reasons, but the biggest factor was the cast pro-x piston. Cast pistons weren't up to the new stresses of the super stroked crank and they had been modified to take a larger piston pin, leaving the piston pin bosses too thin.. I have some more pistons coming and will try again. Luckily it did minimal damage to the rest of the motor. I'd love to have this motor back in my ski
 

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I've been working on putting my rev back together so I removed the wdk pole to put back on the rev and put a rrp pole on my octane.
 

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This build never stops, finally fixed the cart tank problem. I hated that cart tank from the first day, 15min run times, not enough fittings, and cant keep it from flopping around on backflip attempts. Jeff sent me an unassembled wdk chamber, Chad and i rotated the pieces until they fit around an oem superjet tank, and then spot welded it for fitting. I then took it to a kick butt welder who made some custom brackets and welded it together. My next step is ceramic coating.
 

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chad

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Looks good!! he did a great job on the mount . that will be so much easier to get in and out.
 
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