hey rude if there's someone that could answer your question the best being that you are coming off a 90's DR350 is me !!! i am coming off of a 97 dr350 with the big bore 435 kit in it.the differences are like night and day. the WR450 is so much better in everyway.It handle's like a dream and the suspension
is so much better than the mushy DR suspension. the throttle response
with the WR is great unlike the DR where it has a slight delay in power.the WR feels like it's 20 pounds lighter than the DR. the only thing i had to get used to on the WR was the seat height. it's 3 inches taller than the DR.that will be fixed once Kouba comes out with there stuff.if it's power you are looking for than i don't think you will be happy with the 250. that's my take on it,but since you are coming off a DR i thought you might like the info !! if you have any other questions PM me.