F4i, strange noise on decel
Hey guys I need help. I posted this in the CBR forums but am going to try here. OK I'm gonna try to describe this the best I can to get some help. Bike is a 01 Honda CBR600F4i, 15K miles on the clock. I'm the original owner so I know everything thats been done to it. It is definately a gently ridden bike. No track time, 1/4 mile or otherwise. I just recently did the following: new plugs, APE manual cam chain tensioner (CCT), new filter, adjusted freeplay of throttle, changed oil filter and coolant.
The problem:: I noticed this tonight. Goodthing it was my second trip out. The first time I didnt notice probably because I had a head liner under my helmet which muffled my hearing. Upon closed throttle deceleration, I hear a chuff chuff sound that is RPM dependant. I can hear it in 1st gear probably from around 8K rpm - 3K RPM. If I open the throttle even a little, the sound seems to go away. It also seems to be OK if the engine has no load (i.e., revving in neutral).
If I clutch in and let the RPM's drop, the sound goes away so it has to be motor related. I can also get it to do a similar sound if I'm hard on the throttle then close throttle quickly, it will make the sound for a split second.
I think it might be the CCT. I tried my best to adjust it using the listening method, but I'm not sure if this is an indication that the tension is too loose or too tight. The bike's got great power, good throttle response, doesnt feel like any excess engine braking. If it is the damn CCT maybe I'll just go for the J22 part and sell the APE. For those who dont know this bike is notorious for a noisy auto CCT OEM. THe part has been updated to the J22, but others have used the manual adjuster.
I just parked my bike incase its something serious so I dont do any damage. Help!