Hey, i am new to this forum, i have been using it frequently and now that i am stumped, i decided to make an account and see if you guys can help. You’ve helped alot so far… never dealt with ATV before really, lol.

So i have a 99 kodiak 400, and the Exhaust Valve, is $%*#ED
, so i will be going out to my local shop today to grab a shim kit, because i need to fix the slack.
But heres my question… I know you have to add shims to get rid of the slack. but i remember when i did it on a diesel pickup, the valves had to have a Certain GAP. still, now how do i find the desired Gap that HAS to be there,

i am aware of " Using the Feeler Gauges to find the left over Gap that needs to be filled, " But if i were to put a "Bigger one" in and it fit… Do i just keep adding shims, until no matter what the value does not move?