Hookd..I believe because the 950 has an 850 base and a 750 main body! Never knew the 1000 only flows as much as the 850! Cab..I really can't test the carbs out at the track until next spring..when my neck has more time to heal from the surgery! If time's an issue,I can send the 850 back this week. If not,I'd like to test it out in the spring! Please let me know! The engine seems VERY responsive with the "borrowed" 950HP installed! Still waiting for some 50*+ weather to change the air bleeds(lean out)and take it down the road! I live out in the country..2-lane blacktop road,and can get er' rolling pretty good!