On my stock 06 cr125, I changed the fork springs myself and added 2.5 suringes of oil in each fork leg,not sure if you can do that without special tools like my bike. Factory Connection did my mod bike, the forks are much stiffer valving, Setup VET top 3 expert, top 5 250a for 2 laps,haha then fade, setup for clay whoops that,s the hardest valving to do and they did a great job. The owner,s kid rides a CR125 also, so I,m sure that helps.