High-G FJR Junkie!
Join Date: Jan 2013
Location: Millgrove, ON, CA
The root beer ones are way the fastest for sure.
Done many valve checks over the years and while I only have a data base in my head, I would generally say valve clearances change only .001 smaller over time. My latest philosophy based on all that experience is do that first valve check at the recommended mileage or even an extended mileage out to say 35k-ish. However, take the opportunity to re-shim everything to 70% of max, and you'll likely never need another valve check... but the anal in me says do one at 100k. Worst case, valve clearances should only "wear" back to nominal.
Also take the opportunity to do a good throttle body sync, as changing valve clearances will affect the sync (moreso prior to Gen3). Now all cylinders have identical valve clearances and TB sync. Using only the butt dyno, the bike does seem to run better too.
Of course, it helps that I have a fully stocked shim kit, but if you don't, do the check at some downtime (most of us call that winter) when you can take the time to order the shims you need. I get mine from RockyMountainATV, as they are available in quarter sizes so you can be fairly precise.
Keep yer stick on the ice....
2014 FJR1300A - Root Beer (sold)
2009 CBF1000A - Sienna Red