View Full Version : going to get a os 91, what will i need to get for hard 3d?
locostuntguy
09-07-2006, 06:24 PM
I"ve got a raptor 60, upgraded to a 80. With 700 blades and 90 boom and ttube. I want to get rid of the ys 80, and go with a os 91 setup. Overheard people talkin bout what the cspec needs to tune the best. Could someone give me list of what is needed? I'll be buying new motor pipe and all. how bout the 91 hyper?
LInks would be appreciated!
locostuntguy
09-07-2006, 06:52 PM
after reading the post about the cspec and viper head, I see i need a cspec, viper head with 24thou shims.
NOw the other questions, what carb? and do the shims come with the new head? Do i want to get the cspec without the pump?
WayneBrown
09-07-2006, 07:13 PM
OMI mod is required.
James' mod makes this motor sing, especially when coupled with an sb18 hatori muffler.