Hey all...haven't been on here since my FJR became my primary ride, but I still have the VFR and its kind of my dedicated hoon-mobile now. So recently I noticed something odd with the radiator. Basically I opened the radiator cap one day (cold) and saw that the radiator fluid was at about 3/4 full. This was odd because my bike runs great, I do coolant swap every 30/40k, and I have no weeping from my (3rd..lol) water pump. Turns out most of the extra seemed to be in the overflow bottle. I'm figuring that the engine was running nice and hot the last time I rode it (Atlanta summer weather), it overflowed some into the bottle but since the cap rubber is starting to shred a bit in the seal area (75k miles on bike), the suction wasn't quite enough to pull the overflow back into the rad as it cooled down. Do this times a few rides and you've got a under filled radiator. So I'm ordering a cap, which brings me to my real issue. I feel like my bike at idle is a little "knockier" than in the old days when it had less miles. I don't know if this is real, or if its because the FJR has a massive inline 4....which as we know have a totally smooth, even idle character...which makes the VFR sound chunky by comparison. I'm aware of my clutch basket noise....as well as my starter clutch is original...so theres that, but I feel like when I pull in the clutch...it doesn't make this noise go away. Its very subtle...and its not a "tick" sound like the videos of valves, its a "clocky" or "tocky" sort of sound and it seems to be biased toward the rear (hotter) cylinders. Im paranoid that maybe I overheated the rear bank by having low coolant levels I was unaware of? But heres the rub.....it runs fine.... Accelerates great...sounds great on the throttle....just a leeeetle bit louder at hot idle vs how it used to be 30k miles ago. Freak out, or just ride it till it dies and do normal maintenance as usual?