Hi all... been riding an '01 stock F4i for a few months now... and on the rare occasions where I've had to stop rather abruptly to a complete stop... (appying brakes 75% front and 25% rear) it "appears" that my bike gears down on itself? e.g. I'm in 2nd gear and try to stop, then I can hear a distinct "ka-chunk"...

Does this make sense (or some kind of feature or reaction)?

Mind you, it all happens rather fast and I'm just worried about getting to a stop in that exact instant, so just thought I'd post here to see if there's any substance here...

Comments?

Thanks...

i've heard something like that once.. i would think it's more likely a chain noise it makes when you try to shift quickly from accelerating to braking
in my case, it was probably because my chain had to much free play and needed to be tighten up

If you've taken MSF it may be the reaction drilled into you subconscious. Or panic reaction pressing down with both feet :-)

No noise here.

if you press hard enought to break loose the rear tire you will hear the slack in the chain making noise. try this as your riding to see if this is what your hearing.

ORIGINAL: ejohn

if you press hard enought to break loose the rear tire you will hear the slack in the chain making noise. try this as your riding to see if this is what your hearing.

I wouldn't do that if I were you. If the tire breaks traction you run the risk of a highside. Or if it grips at the wrong moment you at least cause extra wear/tear to chain and sprokets. I've heard some say that rough downshifting can even cause the engine to rotate backward for a split second, but that sounds fishy to me.

Oh I understand.

When the tire is breaking traction? As if is too cold, right? I've done that before. A slipper clutch would prob. solve that problem.

i dont even know if i understand the question lol. are you pulling in the clutch when your stoping abrutbly?

ORIGINAL: SkinnyJ

i dont even know if i understand the question lol. are you pulling in the clutch when your stoping abrutbly?


When the tires are not to operating temp and you quickly downshift into a lower gear and release the clutch or locking the rear tire. The whole rear subframe hops and makes a clunking sound.

ORIGINAL: mikem317

A slipper clutch would prob. solve that problem.

Too bad no one makes one for the F4i

ORIGINAL: mikem317

ORIGINAL: SkinnyJ

i dont even know if i understand the question lol. are you pulling in the clutch when your stoping abrutbly?


When the tires are not to operating temp and you quickly downshift into a lower gear and release the clutch or locking the rear tire. The whole rear subframe hops and makes a clunking sound.


o thanks for clearing that up. mine does not make this sound and i downshift all the time, if i downshift and let it out to quickly somtimes my end might get a lil squirly but thats about it

ORIGINAL: SkinnyJ


ORIGINAL: mikem317

ORIGINAL: SkinnyJ

i dont even know if i understand the question lol. are you pulling in the clutch when your stoping abrutbly?


When the tires are not to operating temp and you quickly downshift into a lower gear and release the clutch or locking the rear tire. The whole rear subframe hops and makes a clunking sound.


o thanks for clearing that up. mine does not make this sound and i downshift all the time, if i downshift and let it out to quickly somtimes my end might get a lil squirly but thats about it

Practice this technique (http://www.superbikeschool.com/bbs/index.php?s=b75c25ce8033b711cee7706f86aa43af&showtopic=258):

I heard KACHUNG when i locked my rear brake once
definitely the chain

ORIGINAL: Jaybird180

Practice this technique (http://www.superbikeschool.com/bbs/index.php?s=b75c25ce8033b711cee7706f86aa43af&showtopic=258):



Cliff notes version?

nice little write up.

MaverickPrince when you hit your brakes you hit the clutch too? Or you use engine breaking as well? If that is that case where you use engine braking than it could be the chain locking up because you are going to stall-out because your rear brake is locked in.

Dont' think anyone can say it better than Keith Code. If you don't know who he is I recommend you do some reading up on his site. (http://www.superbikeschool.com)

i am reading a lil on this site, and they seem to be doing alot of talking about downshifting in corners... can you please clarify as i was taught (msf) to not brake/downshift in the corner by the time you enter the corner you speed should already be matched and you should be accelerating through the corner

Your downshifting should be done by the time you hit the turning point. For safety reasons, your shouldn't shift in a turn it should be done even before you countersteer to start to tip the bike in. Any racers wanna comment on timing?

ORIGINAL: Jaybird180

Your downshifting should be done by the time you hit the turning point. For safety reasons, your shouldn't shift in a turn it should be done even before you countersteer to start to tip the bike in. Any racers wanna comment on timing?


And all your braking.

And you should actually be just enough on the gas to take the engine braking forces off the bike.