At about 150 to 160 kmp/h my iron realy gets a wobble up so much i are scard to try and ride through it. i only notised it after putting drag bars on has any one got the same thing going on thanks

thanks i think that is the  case the bike is new only 2000 km on it . but the wobble is full on at  85 kg i shouldent be to heavy i might harden up the rear shocks and se what happens

sounds to me like you need your wheels balanced, although whether there's any equipment that can pick out a wobble at that speed is another question. I also thought the alloy casting would be pretty flawless, but maybe the tyres aren't on properly?

Ah, what would I know.

my 48 is generally steady as a rock at 180 but I stiffened up the rear shocks coz I got sick of bottoming out (im only 70 kgs) and now it gets a little wobbly over bumps ,theres no way Id take it over 140 the way it is

(NOTE all speeds over the limit, checked on the track )

Had mine at 160 and it was steady as a rock, I am 100kg+ so that might have something to do with it, also it wouldn't go 1 km faster, not sure if it limited or the anchor holding onto the bars......:-)

do yourself a favor get a good back Tyre and upgrade the shocks and keep an eye on tyre pressure

the 48 comes stock with a fork brace I am guessing it is necessary

 If its to do with wheels being out of balanced, I noticed on another bike I had it was doing it in at 180, 120 and 60 to some degree, seemed to be when resonant frequency kicked in.  Turned out to be a slight flatening on the alloy rim, from riding up a kerb or something.  Can't see your handlebars being the issue, but if they are narrower and takes the leverage away will make it more noticeable.  I'd start with wheel balance and pressure check, a tank slapper wouldn't be fun.

Interesting reading but nothing to do with my point.

I was saying that offering a high range product doesn't prove your base model is shit. Even if it is shit.

Besides, if anyone on this forum truly cared about their bike being the latest technology and having superior performance they would ride a rice-rocket. They do everything better than a Harley, yet we ride Harleys anyway.

I sold a CBR600RR and bought a 48 because riding is about more than having a bike that can MotoGP between traffic lights.

I can't understand why self confessed Harley enthusiasts like yourself come to a Harley forum and then rag on Harleys.

Or you just like em, like me.

Did ya know Drag Specialties make a steering damper kit that bolts straight on to the Sporty?

 16 " has more chance of a speed tank slapper than a 19' or 21", make sure the rear tyre is not squared off  , you realy have too punt harleys thru the corners to stop the tyres for squareing out ,  even a little bit square   that will make  it wobble . the harder rear suspension will make it worse ,            try stiffing up the forks there too soft , i don't know why they put a 16" on the front on the sporties with out giving them more trail in the steering ,       by lowering the rear you will give her more rake & trail that will give more straight line stable, i knew when i 1st seen them that whey would wobble ,  a steering damper will only hide a bad handing bike , it's like putting a band-aid on a cut that need stiches,  good handling bike's go fast thats why they have a damper because they quick steer = min trail  + tankslaper . not a harley 

160 , 180, YOUR ALL GOING TO JAIL

daddyracer

 thanks sounds like you know exactly what i mean..... only started after a burnout, come to think of it!

 i use too roadrace sporties in the no longer 883 twin sport class  ( ROARING SPORTIES ), we use to put up to 15" or 16" long rear ohlins etc too get ground clearance  but well also had the longer fork's model  with gold valve's  set-up etc   but even with a ohlins steering damper on board  i use too tankslap a lot,  flatout in top gear  down the main straight esp @ Phillip island  & Lakeside  the 2 fastest straight's in Aus,  the later has a kink in her  that you do not back off for  thats flatout ,  on the street  i hold the bike over for as log as i dare  in the middle of a corner  & pull on the throttle  as much as i dare too keep the tyre  radial as they tend to square off  once a tyre is 1/2  way worn the halding goe's out the window  just about  esp if it's squared off   ; i try not too use the rear brake  too much run the bike deep into the turn on the front brake  . the more you use the rear brake the more you wear her the tyre that is   because the back becames light  better off burring the front into the road for more grip + the more you use the front brake the more you wear the front tyre out so you can buy a new 1 & keep it fresh & newer , because a lot of people leave there front tyre on for too-long & they go off ( HARD ) then it's danger esp on a winter's wet nit'e  around a round about if you know what i mean,   tyre presure's play abig part allways check  2 weeks max,               good riding 

 Dead on daddyracer