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A pic of what I discovered when I removed the head

Apex2006

TY 4 Stroke Guru
Joined
Oct 26, 2009
Messages
910
Location
McHenry, IL
Country
USA
Snowmobile
Yamaha Sidewinder SRX-LE 2019
Yamaha Sidewinder XTX 141 2017
Yamaha Viper XTX 2015
Yamaha Sno Scoot 2018
Ski-Doo Renegade XRS 850 2020
Looks like a blown motor to me, anyone know if this can be repaired? Otherwise I am parting the sled and shopping for next year. Only had 3000 miles and finally got it dialed in this year, one of my fastest sleds, even smoked my Apex......

photo13.jpg
 

Apex2006 said:
Looks like a blown motor to me, anyone know if this can be repaired? Otherwise I am parting the sled and shopping for next year. Only had 3000 miles and finally got it dialed in this year, one of my fastest sleds, even smoked my Apex......

photo13.jpg

To much boost not enough fuel looks like
 
Yep, I agree, anyone know if it can be filled and milled down or is it shot?
 
8-9 lbs which is too much without head studs and upgraded gasket. Decided I am going to part the entire sled out including the turbo and put my money towards the new SR Viper! Turbo has less than 300 miles on it.
 
Apex2006 said:
8-9 lbs which is too much without head studs and upgraded gasket. Decided I am going to part the entire sled out including the turbo and put my money towards the new SR Viper! Turbo has less than 300 miles on it.

No its not, the stock nytro motor can handle up to 16lbs of boost with the right fuel (i.e 116)... I believe you were running to low of octane fuel, bad fuel or tunning too lean... You know the saying "to lean - to bad"

Sorry for your luck, hopefully a learning experience....
 


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