You don't need to, it is not Polaris....LOLDo the sled guys have to upgrade the rods for high boost? In other words how much power is this motor good for in stock form?
Pretty much as milousa has stated. If you ride at elevation (5,000 up) you can get way with 10 lbs of boost on 91 pump gas before dished pistons or thicker head gasket. These motors that Yammi puts out nowadays is pretty solid and holds up to boost very well.You don't need to, it is not Polaris....LOL
Seriously, up to 300 HP I was told this engine is good to go on internals , but for sure you will need to lower the compression by thicker head gasket, if going over 5-6 PSI boost ( 150 HP ) .IMO
Do you have one on order? What manufacturer are you looking at? I can't wait to see how the YXZ does with the hair dryer. I know the motor can handle the boost but it will be interesting to see how the SxS holds up. Yamaha usually overbuilds their toys but the kind of power this motor is able to produce on boost is staggering. Will be interesting to see what the week points end up being.I can't wait to put a turbo kit on mine.
Don't think you get any advantage to go with low compression piston on Yamaha where pistons are already forged. Main reason the people replace them on RZR's was to get forged piston in place of cast one Polaris engine use on NA engines. People I know who runs Yamaha Apex swap all use just thicker head gasket when run turbo. I know some say thicker head gasket could alter cams timing little bit, but I don't think make any big difference. Cometic even make thicker head gasket for Z1 Turbo engines, if you want to run bigger boost on pump gas, I run this gasket on my XP 900 swap. I think lower CR one point.Milos, what advantage would a piston swap have over a head gasket if any, considering the Yamaha has forged Pistons already ?
MPI kit looks good, but not sold on the placement of inter cooler above the engine....lot of heat there.Yes I have one on order white and blue. The only kit I have seen so far is the MPI kit. I really haven't researched the different kits yet.
Look at the cost difference between all the other rods and the YXZ version. That suggests a lot. I hope the bean counters aren't taking over!Here are the four different rods Yamaha uses in the various triple engines.
5JW-11650-01-00 $188 All Carbureted 973cc snowmobile engine, also FJR1300 motorcycle. Uses bolt w/ nut
8GL-11650-00-00 $160 All EFI 1049cc snowmobile engines up to 2015, possibly some 2016. Uses bolt w/ nut
8KH-11650-00-00 $118 Most EFI 1049cc 2016 and up snowmobile engines. Bolts that thread into rod
2HC-11650-00-00 $77 All YXZ 1000R 998cc 2016 and up. Bolts thread into rod