the RIS bike is light no doubt, but your not going to save but a few pounds by removing the front brakes. now ti hubs and front brakes, and some lightweight arms, like the RIS bike then yeah.

 

right if you are running basicly stock weight front end stuff i think the 6" or 8" is over kill to much weight on the front end. if you are going to the light front end then think about going longer than 4" on a built YFZ. with all the weight out front & a arm that is to long you will just spin to much out of the hole.

 

exactly.

 

Yeah but I want to jump alot but not wheelie too much where I would lose in a drag or at quad wars.

 

my question stand firm, a 505yfz is going to make a ton of power, and it pretty much a race motor, not a casual duner for jumping with the ocasionall hill shooting.a +6 or +8 will not hold up for jumping and a well built +4 is still not recommended. call the swingarm company and ask them tell set you straight.