I used to get a front end shimmy at high speeds on my old Yamaha. I eventually traced it down to the REAR wheel being out of balance and creating an oscillation through the frame.

 

I stopped here. Ride safer and **** like this won't happen.

 

Barf. Pow pow power wheelies all day long. No skill, just crack the throttle and hold on. Do not mistake stuff like this for skill, and definitely don't aspire to be like them. You've been riding for a few months tops, and you're talking about cracking wheelies and snapping brake levers. Grow up and learn to ride properly so you can spare yourself from a hospital visit in the near future.

 

you have something mechanically wrong with the bike and changeing oil or tighting your chain type maintenance will not fix it. your riding style or learning to grip the bike less or more has nothing to do with what you have described, or getting a stearing stabilizer wont help with what your describing either.

some thing is wrong with the suspension set up, wheel bearings, head bearings or brake calipers hanging up...something of that nature. if your gonna be doing triple digit stunts and stuff before you get it fixed then make sure you video tape it. so your friends can put it on the faces of death movie or best gore . com. ........

you guys ever see the biker who hit the semi in the back at triple digit speeds on best gore? lol, head went through the back door of the semi and the driver drugg the biker like ten miles before he pulled over. he said he didnt know he was back there. dead dead...prolly had a tank slapper, lol

i make sure my bike is in perfect order before riding it like that, its just common sense. i ive ripped it open at triple digit speeds a couple times for fun. it would be plain stupid to do it when my bike is malfunctioning though. i laugh at people when they do stupid **** on bikes and get hurt....seriously. stunting on a well maintained bike is different than riding a bike when a bike is f'ed up....just plain stupid.

o, yeah, get a shop manual, look into the trouble shooting portion of the book and do a lot of praying. lol

 

Plus, rule #5 in the CBRF guidelines says: "The use of the CBRForum to promote or engage in any illegal activity is strictly forbidden". 120 mph might be legal on the autobahn but nowhere I know of in the U.S on a public road.

 

He was giving us background info on how the problem occured.

 

yeah right ,lol... with all respect to everyone. correct me if im wrong but, from what read it says he did a fresh oil change got new levers and tightened the chain, then went to do wheelies and the wobble / tank slapper problem seemed to have gone away? ~so fresh~ like those things have anything to do with the problem. ok. lol. we got a dude in our group, he had the same problems and handled it about the same way. he rides an rr. we all say it stands for "road rash".

i put cash money on it being the suspesion set up or head bearing. specifically in the rebound damping, or loose/ damaged head stem bearing, or all three. happy riding everyone.

 

jesus christ that is an eye opener, that and the taco bell crash is a wake up call, OP you should google motorcycle vs taco bell but the trailer is on the forums here https://cbrforum.com/forum/sights-n-...graphic-44930/

 

lol, yup thats the one.

 

Uh, yeah thats some pretty sick **** Chubs. Was that dude in the last pic holding a foot, or a giant taco?

On topic, to reiterate whats already been said, the F4i does not need any kind of steering stabilizer. I'd get that bike in for a full safety check ASAP.