Well it got cold a couple days there in December so I order a air filter and a cen clutch and changed crank thought it was going to stay cold.It got real nice yesterday so went to check it out and ride I got every thing running with the cen clutch and now no throttle,bogs down at about 5 mph and the more throttle you give it back fires and bogs down it was running alright when I started in December the only thing I did was swap air filter.any idea's