okay we are starting on our 350 project based on the 2008 wr250r. I have come up with what I think is the optimum bore stroke to get the little 250 out to 350. Based on our ktm development mule (250 to 350 35hp 18tq to 46hp and 26tq) my goals are 42hp and 24tq with pump gas in mind and durability same as stock. This will be the first stage with potential to develop out to 48hp and 27tq. I will post our results as we go. The plan is to develop this as a build and offer them to the public as new bikes or build yours. If your interested you can also follow our progress through facebook or twitter under pinit motorsports