rpm with a big bore kit

[TRENCHER]

hi i plan big boring my snowmobile from a 900 to 1000 cc, and i plan on running the stock pipe with the the big bore kit. my current rpm is 7400 stock will it lower my stock operating rpm or will i have to port it to run 7400 rpm. thanks!

[flotek]

well your going to gain some decent torque mostly noticable in low-midrange but I dont think it would be worth it$$$ for the gain ,id get custom porting instead youll have power everywhere especially on top rpms where the sleds really shine