that green writing just gave me a mean headache! lol

the 2.5 is a slide carb. the os is a rotary but is available with a slide you will have to use the old e z start and khb adapter.

slide carbs are the best you can get. on or off road. slides are smoother and offer more top end. all, ALL .21 and above use slide carbs. and they are used off road quite regularly if you have not noticed.

bubbafien