Viper crankcase and srx cylinders and heads

kirk700 srx

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labrador city n.l
I recently installed a viper crankcase and crank with srx cylinders and heads. I know the porting is different on the viper crankcase so should I upsize my jetting?
 

The 2000 + up SRXs share the same crankcases with the 2003 + up Vipers. I am running a Viper crank in my 2002 SRX. The 1998/99 SRXs use a different crankshaft, stator. flywheel, and cases then the later ones.
Bob
 
kirk700 srx said:
I recently installed a viper crankcase and crank with srx cylinders and heads. I know the porting is different on the viper crankcase so should I upsize my jetting?
there is no difference in the shape of the crankcases in reguards to porting only the pickup location and pto bearing bore is different,if this is your 98 your talking about.how did ya make out with the water pump?
 
I made sure everything was spotless not even a piece of lint and the drip went away Thankfully! Im good to go I guess! John at Yamaha told me that the viper crankcase had diff porting? I figured that all the porting was in the cylinders! I dont know why he said that or is he right? Maybe he was thinking I was gonna use the viper cylinders
 
I hope its all done right man! if not I guess I will have some more parts for the other srx! Im trying to convince the wife to let me buy a new nytro turbo. I guess she loves me,cause I have almost a million in life insurance and she says NO... LOL
 


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