Buzz.....

[Louatlvc]

Greetings, 

Just purchased a 2015 FJ09 with 6k miles. Ive had Yamahas (FJR and Super Tenere) but this is my first triple. I’m experiencing an engine “buzz” and wondering if it’s a fuel delivery issue or simply a characteristic of the triple. When I’m accelerating through gears engine is very smooth. But, when I maintain a steady speed with throttle barely open (1/10th throttle) the engine becomes very buzzy which can be felt in grips and foot pegs. Normal?

thanks much. LL

 

[Toddtr]

Sync your throttle bodies, it’s a 30 minute task, borrow a digi sync if you can

[nhchris]

I'd say very normal, especially if the former owner installed an undamped front sprocket.

Pop off the primary cover and inspect the front sprocket. If it does not have a rubber isolation ring between the inner and outer gear teeth. It is  undamped.

The FJ is a buzzy bike compared to your previous rides.  Nature of the CP3 beast.

Edited November 9, 2020 by nhchris

[Louatlvc]

Thanks guys. Just checked and I DO have the rubber insulated front sprocket. I don’t think PO ever had throttle sync done. I have a sync tool but only for twin. Just ordered one and I’ll sync this weekend. See what happens. The buzzyness is not a problem. Just foreign to what I’m used to coming from  parallel twins or in line fours.

[roy826]

Mine is pretty buzzy as well above 6k rpms. New 2020 only 400 miles on it.

[riding_tall]

Sync'n the throttle body's, run the chain a little loser than factory spec and some bar end weights all helped on mine. Now I don't notice.

[Toddtr]

7 hours ago, Louatlvc said:

Thanks guys. Just checked and I DO have the rubber insulated front sprocket. I don’t think PO ever had throttle sync done. I have a sync tool but only for twin. Just ordered one and I’ll sync this weekend. See what happens. The buzzyness is not a problem. Just foreign to what I’m used to coming from  parallel twins or in line fours.

Can’t you sync the 1 and 2 together them take hose 2 to 3 and sync to 1? Just axing

[knyte]

8 hours ago, nhchris said:

rubber isolation ring

OGNIBENE (#21607-7180) 525 Pitch Rubber Dampened Front Sprocket - YAMAHA - FJ-09 2015-2018 - Yamaha - STREET

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Fits the YAMAHA FZ/FJ 900/700/800 , R-1 models - OEM-Style...

Like this ?  Dang, that explains a few things...

[nhchris]

That’s it.  When I installed my 17 front I checked them out and they only did 15 and 16 tooth offerings.

My undamped 17 is noisier than my old damped 16.

[knyte]

Thanks.  Although I don't have the buzzing - at least, not that I'm aware of - I do notice the occasional 'sharp' shift if I'm not carefully smooth with the clutch...this should help a bit, hopefully.