Marc1100xx Posted September 28, 2008 Share Posted September 28, 2008 After i've changed the tires to MPR2 en placed tapered bearings i've got a weave in the bike Until 140 km/h the bike is stable and beyond this speed the bike goes light on the wheels and starts waeving Like this picture Last week with passenger the bike felt not strange at 170 km/h and also with the topcase on. Thursday i noticed it realy good on the autobahn, i could not exceed speeds over 140-155 km/h but on the nurburgring the bike felt great in corners. Very stable but hell no if i went over 140-155 km/h. Friday 500 km/h through the eifel with hairpins it felt great, so on low speeds it is fine. In the old situation a few weeks ago i went over 245km/h and no problem for me. (old steeringhead bearing with deadpoint and 11000 km old roadtec z6) What i did so far: New tires MPR2 changed with old ones. steeringhead tighter and loser New steeringhead bearings Felt for freeplay in wheels, suspension and swingarm forks don't leak. no sounds or clicking when suspension is pressed With cases and no cases (givi) With more weight on the bike it is less noticeable and comes in later. So I do not know it anymore Quote Link to comment Share on other sites More sharing options...
EVLXX Posted September 28, 2008 Share Posted September 28, 2008 It's your suspension ride heights, and spring preloads that are giving you fits. I'll go see if I can find the thread you need to read. Edited: Here it is... read this thread.. http://www.cbr1100xx.org/forums/index.php?...p;hl=suspension Quote Link to comment Share on other sites More sharing options...
Marc1100xx Posted September 28, 2008 Author Share Posted September 28, 2008 It's your suspension ride heights, and spring preloads that are giving you fits. I'll go see if I can find the thread you need to read. Edited: Here it is... read this thread.. http://www.cbr1100xx.org/forums/index.php?...p;hl=suspension Ok but why was the bike stable before the new tires and steeringheadbearings with the same suspension setup. I have now changed it but there is no progression in stability. Quote Link to comment Share on other sites More sharing options...
tomek Posted September 28, 2008 Share Posted September 28, 2008 Check STN forum,I`m too lazy to repost it here.Your new bearings are most likely too tight. Quote Link to comment Share on other sites More sharing options...
runner Posted September 29, 2008 Share Posted September 29, 2008 75% chance bearings or tires are the cause... Quote Link to comment Share on other sites More sharing options...
LogoMan Posted September 30, 2008 Share Posted September 30, 2008 I was talking to Rick at Cogent Dynamics about weave today and he mentioned that if Michelins aren't seated properly they can produce weave. Also, that steering head bearings are the prime culprit most of the time. Quote Link to comment Share on other sites More sharing options...
bigblock Posted October 1, 2008 Share Posted October 1, 2008 I was talking to Rick at Cogent Dynamics about weave today and he mentioned that if Michelins aren't seated properly they can produce weave. Also, that steering head bearings are the prime culprit most of the time. I have Michelin Pilot Powers and they weave (especially at lower and freeway speeds 45-70 mph, the grooved concrete highways here in North Florida are a bitch) perhaps they were seated wrong? 2+2=??? I've been mucking about with tire pressure and did not want to get into suspension stuffs, perhaps that's the answer..... anyone else find this? Quote Link to comment Share on other sites More sharing options...
Marc1100xx Posted October 1, 2008 Author Share Posted October 1, 2008 Today i went to Hyperpro and they said that the front suspension is very weak. They are going to reshim them and have a look at the stearingheadbearings. The bearings have a strange spot, maybe a faulty installation. Hyperpro also will place a spacer on the rear shock for better handling. The rear shock is still good, so i do not replace this now but when the bike hits 70000 km i wil place a new one. I hope to have a bike that rides like new this friday. Quote Link to comment Share on other sites More sharing options...
Helvet Posted October 3, 2008 Share Posted October 3, 2008 I hope to have a bike that rides like new this friday. And the verdict is????? (Friday has ended here in Holland) Quote Link to comment Share on other sites More sharing options...
Marc1100xx Posted October 3, 2008 Author Share Posted October 3, 2008 I hope to have a bike that rides like new this friday. And the verdict is????? (Friday has ended here in Holland) Not yet Frank, still 57 minutes to go I've got new front springs and reshimed teh front suspension. The oil was 6 years old and needs to be replaced about 2 years or 20000 km. New steeringheadbearings, i've maybe installed them not good. There was also a spot on the frame so the bearings did not fit right. They have to remove it first. The rear shock has been adjusted and for the short ride home it felt like a new bike. SO now i'm saving money for a new rear shock. Quote Link to comment Share on other sites More sharing options...
OMG Posted October 4, 2008 Share Posted October 4, 2008 What they all said - and my bike does the same thing every time I've had more than six shots of Tequila. Quote Link to comment Share on other sites More sharing options...
bartonmd Posted October 6, 2008 Share Posted October 6, 2008 It's your steering head bearings being too tight... Been there, done that... loosened them up a little bit, and GTG... Mike Quote Link to comment Share on other sites More sharing options...
Para045 Posted October 9, 2008 Share Posted October 9, 2008 It's your suspension ride heights, and spring preloads that are giving you fits. I'll go see if I can find the thread you need to read. Edited: Here it is... read this thread.. http://www.cbr1100xx.org/forums/index.php?...p;hl=suspension As in that thread I have had problems with weaving as well and haven't got rid of it totally I did loosen the SHB's but it still did it, the trouble for me is I changed a lot in one go So trying to pinpoint the cause isn't easy I have a PPf and PR2r, 6mm shim and newer front forks with heavier springs My sags are within normal ranges and mine seems to do it mostly around 180-200 kmh Quote Link to comment Share on other sites More sharing options...
cbrxxquad Posted October 9, 2008 Share Posted October 9, 2008 Do you still have the center stand? I am thinking that "the Numbers" have something to do with this. I was able to make it happen with the ZXXX by reducing the preload adjustments. Check the distance on the centerstand from the gound to the front lip of the bodywork. And how far from the ground is the rear tire, if at all. Did you go with stock bearings in the steering or tapered. Check the alignment of the rear to the front, I found that when the front dim got to 6 inch with the rear touching the ground but able to spin would do the slow weave. Went away at 6.25. Quote Link to comment Share on other sites More sharing options...
Marc1100xx Posted October 9, 2008 Author Share Posted October 9, 2008 It's your suspension ride heights, and spring preloads that are giving you fits. I'll go see if I can find the thread you need to read. Edited: Here it is... read this thread.. http://www.cbr1100xx.org/forums/index.php?...p;hl=suspension As in that thread I have had problems with weaving as well and haven't got rid of it totally I did loosen the SHB's but it still did it, the trouble for me is I changed a lot in one go So trying to pinpoint the cause isn't easy I have a PPf and PR2r, 6mm shim and newer front forks with heavier springs My sags are within normal ranges and mine seems to do it mostly around 180-200 kmh The guy at Hyperpro said that it could be the Pilot Road tires, he had a other biker who got also a weave at higher speeds and also changed to MPR's. I have a small weave at 180+ so i can live with that for now, but will change the tires back to Roadec Z6. I have not felt a single weave with that tire, and i know that my previous VFR8 also felt light with Michelins. ( maybe it's not my tire) Quote Link to comment Share on other sites More sharing options...
Obby Posted October 9, 2008 Share Posted October 9, 2008 I had the same problem (only under hard acceleration), I just needed to dial in the suspension and tire pressure. Quote Link to comment Share on other sites More sharing options...
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