I took my engine apart because it desperately needed some new rings. Found that 2sd and 3rd gears were worn/pitted. Split the cases and replaced second and third gears on both the main shaft and the countershaft. Got my bike together Sunday morning and did a break in and test ride at Gorman Sunday afternoon. Everything went pretty much OK. At idle the engine is much quieter than it was before. Those new rings really helped the low RPM torque. Wow!! However, I noticed a new noise. It only happens in second gear when applying power to maintain speed or accelerating. If I hold in the clutch, or let off the gas it goes away. It's not too loud, so I can't hear it if I give it lots of gas. It's a whirring kind of sound. No sound like it in any other gear. Is this just the sound of some new straight cut gears? Should I be worried, or am I just being paranoid? If it's the new gears, why don't I hear in in third?