I have a 02 RM 250 and am wondering how heavy of a flywheel weight I should put on it? I ride MX but it hits hard and has little traction, I'm looking to see what would I need to make it have as much traction as my 05 YZ250. I ride this sand track alot which has a lot of hills and I'm faster on my 05 because its so smooth and torquey and tractable. Would a Boyseen Rad Valve and a 9oz flywheel help smooth it out and have less wheel spin? I already have a FMF Fatty/Shorty and it was more broad but not enough.