i just ordered the mr. HP end cap and i dont know the first thing about jetting. I have a 2003 ds650. all stock. I read that an end cap is a very good mod to do. Its gives you quite a bit more horsepower for the money. the question is i know i will need to rejet for this but what jet on the carb do i change? also what size is the stock jet on my machine. i dont know the first thing about jetting so go easy on me. im in massachusetts. about 15 miles from the coast. i dont know what elevation i am from sea level. what i

 

If you got the MrHP end cap from MrHP it should come with jets or jetting instructions. Contact MrHP if you have any questions.