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Blown Motor On My Nytro

:face-icon-small-hapTOOK OUT MY BOOSTED NYTRO TODAY WAS KICKING *** AT 18 LBS ON THE SIXTH POKE LOST POWER OND MOTOR WAS DONE DEALER SAID LENGTH OF ROD WAS TO SHORT SO BEWARE KIT IS MCX MY DEALER IS REPAIRING AT HIS COST WHAT GREAT DEALER. IF ANYBODY OUT THERE IS LOOKING FOR A DEALER TO INSTALL ROCKY MONTAIN YAMAHA IS THE PLACE TO GO IN PINCHER CREEK AB CANADA
 
What kind of fuel were you using? And did you make consec. runs without letting it cool down???I have the same kit @ 14 lbs so far so great:D
 
Hmmmm, being so vague let me have a crack at this.

1) Connecting rod ?

or

2) Wastegate rod was shortened, which add's boost and you were not running the proper fuel for 18lbs ?

The later is my guess.
 
Hmmmm, being so vague let me have a crack at this.

1) Connecting rod ?

or

2) Wastegate rod was shortened, which add's boost and you were not running the proper fuel for 18lbs ?

The later is my guess.

thats my quess too, I have seen 22lbs on mine with good fuel no problems, I have turned it down now.
 
So many ???S but no answers...What would you think the safest boost with good fuel for the mcx nytro?????:confused:
 
with the head shim and good fuel I have made several hard pulls at 18 lbs. I wouldn,t want to go anymore than that for any length. I think I will keep it down around 14-16 to be safe.
 
blown motor nytro

waste gate rod was set to short dealersaid premium was ok for some reason the motor got to lean not afuel prbolem. will be ready for weekend and we will try again
 
waste gate rod was set to short dealersaid premium was ok for some reason the motor got to lean not afuel prbolem. will be ready for weekend and we will try again

The dealer may have said premium was OK to run but not at 18lbs!!!!! What were you thinking? Don't blame them for the overboost. Fault of the rider for sure. Let me guess........didn't believe the gauge or some other excuse.
 
you threw a rod on Tuesday, and your dealer is going to fix it, at his cost, and have it ready by Saturday? !! WOW, I'm impressed. :) :beer;
 
wow

not sure if i understand this, you were aware of 18lbs boost and knew you had premium pump gas in the tank? i feel kinda sorry for your dealer for putting together such a sled for someone who doesn't understand anything about boosted sleds. you were over 300 hp with an engine the size of a lunch kit on pump gas. i just bought my nitro 2 months ago with stage 2 sc, and within the first day of owning it i researched all i could about running this class of sled. here are some tips for the future, correct me if im wrong guys, but this is what i understand. 8lbs of boost (175hp) safe on pump fuel at 3000 ft. 10lbs boost should run 50/50 race fuel, 10-12 lbs boost fine to run at elevation with head-shim which drops your compression a bit so pump gas is ok. 15lbs boost, 50/50 race fuel......after 16lbs boost, carillo rods and aftermarket pistons should be added (some guys have luck over 15, but most agree thats pushin it for stock rods and pistons), 18lbs of boost, should be straight race fuel, maybe headshim allows 50/50 at this point, but the nitro cannot supply fuel with factory fuel system at 18lbs boost so fuel system upgrade including fuel regulator, fuel pump, and in some cases changing injectors are a must. who would spend over 20,000 on a sled and not do some research, but i guess it shows that in the wrong hands, even a bullet proof machine doesn't stand a chance. and if you have 20,000+ to spend on a sled whats the problem running some race-fuel. im running straight race fuel just caus im too lazy to mix, but its a small price to pay. i used to burn premium + $30 worth of synthetic 2-stroke oil in a day, now no fancy oil to burn so i put the money into better fuel. good insurance. maybe i misunderstood whats going on here, but its my .02
 
blown motor on nytro

i have been on turbo for 3 years now on apex 13 lbs on premium no problems. first ride on nytro boosted was dynoed for your info premium is ok and does not make 300 hp it is around 240 dyno does not lie. it did not throw a rod top of piston indicates lean not detonation
 
waste gate rod was set to short dealersaid premium was ok for some reason the motor got to lean not afuel prbolem. will be ready for weekend and we will try again


BAHAHAHAHAHAHAHAHAHAHA "ok for some reason the motor got to lean not afuel prbolem" LMAO ------ For some reason ? Not a fuel problem ?

Im sorry, but ive got zero sympathy for "this problem". If your dumb enough to think you can run a turbo'd nytro at 18lbs of boost on pump fuel, you should'nt own one. Period. As said many times before, a turbo isnt for everyone and clearly this point is still valid.
 
On a side note I bought my Nytro from Myles at Rocky Mountain and he was great to deal with. I'd say consider yourself lucky you bought where you did.

M5
 
i have been on turbo for 3 years now on apex 13 lbs on premium no problems. first ride on nytro boosted was dynoed for your info premium is ok and does not make 300 hp it is around 240 dyno does not lie. it did not throw a rod top of piston indicates lean not detonation

You may have gotten away with 13 lbs on premium on your Apex (which is pushing it if it was an MCX with a head shim), so what made you think the Nytro would stand up to 18?!!! If I were your dealer I would not be covering you.
 
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