ok so i bought my son a 2018 kx85 last September because he out grew his 65. over the winter the kid must have grew a foot because he's to big for the 85 now. i have all the clickers turned in and hes still bottoming out. he's 12 years old 5'5 125lbs. My question is should i do a big wheel conversion and get a taller seat or get him a kx100? Is it worth the time and money to do the suspension and all the work on an 85 or just get him the 100? The only thing is he's not using all the motor of the 85 yet, its just hes to big for it. Not sure how much more power the 100 has.He's getting faster and faster but the suspension is holding him back. hes not comfortable landing long jumps but he knows he can make them. just wondering if anyone has run through this. any advice would be greatly appreciated. thank you