Definately do the 39PWK. I did on my 2001 2x4 Scrambler, took off the oil injection mixing Amsoil 80:1 and the thing CAME ALIVE.

I may try the gearing too, cuz this quad runs so responsive and hits hard. In fact, knowing the port is an improvement but I decided to hold off cuz it is SO rare I get beat in drags.

The 39PWK with the Ritter Stage 1 kit (HPD Trail pipe, air box mod, clutch improvement) is all I want. Now it is time for suspension.

BTW, I saw you were looking at Honda 250R, my riding buddy has one and I scholl him badly in drags, in the trails but not in moto X. 250R loses by 3-5 quad links (has a FMF pipe and carb), doesn't have reverse so he is stuck ALL THE TIME in tight trails and is smaller than the Scrambler so in depp creeks, going over big logs, etc... we have to help him.

But the 250R is quite good on the MX track. Otherwise do the Ritter Stage 1 with a 39PWK on the Scrambler. It makes it a really good all around sport quad.

Chunky

 

i want a 250r for hard riding,my scrambler just seems to keep breaking when i ride hard..i think im still going to keep the scrambler for trail riding,ill end up trail porting it someday,but for now i have a pipe,k&n filter directly on the carb,v-force reeds it's pretty fast but way to heavy..