I just put a new piston in my 2008 Husky TE510, and was checking the valve clearances before closing up the engine. (I bought the bike used, it has 4,000 miles on it, and this is my first valve check.) Both exhaust are in spec at 0.20mm (range is 0.15 to 0.20). Both intake are at 0.66mm -- and range is 0.10 to 0.15! That means that if I put in the thickest shim Husky uses (2.6mm), my clearance is still too large by 0.26mm. That's equivalent to over five shim sizes! The intake cam is not worn; the bearings are fine; the shims I removed (2.30 and 2.35) are not squished; there is no carbon buildup holding the valves open, as this is the intake side; and it can't be a bent valve stem, since both valves are out of spec almost exactly the same amount. My only remaining theory is this: could the first owner have installed a different cam than stock, one that uses different clearances? I know Husky sells power-up kits that include cams. And since the bike has the Arrow exhaust, lambda probe removed--and accelerates like crazy--I know the previous owner did something "power-up-ish" to it. Any ideas? Install the fat shims, ignore the ticking, and assume the clearances will slowly decrease as the valves wear?