Bouncy bouncy?

**kravenmore** · 21st July 2009, 11:38

I've got what could possibly be a newbie question but here goes.
I've got a Hyosung GT250R and when doing over 60km/h I start to get a bit of bouncing of the front tyre. Its most noticeable at around 70km/h. I'm wondering why that would be? I've tried adjusting my seating to alter weight distribution but that doesn't seem to affect it at all, neither does hunkering down low on the bike.
I'm thinking it could possibly be an alignment issue?

Any help would be much appreciated

**vifferman** · 21st July 2009, 11:47

Welcome to KiwiBiker.

By "bouncing", do you mean the front tyre is physically bouncing off the road surface, or does it just seem rather bouncy?
Things you can check are the front tyre pressure - if it's too high, the front wheel will tend to skip over bumps, and the action of the front forks. I dunno much about your bike, but it may be that your model just has very poor suspension damping. Given that it's a 2009 model, does that mean it's still uder warranty? If so, go back to your dealer and tell them your concerns and make sure they check the suspension action. If the forks are a little twisted or otherwise binding, the suspension action won't be good and will seem bouncy. Otherwise it may just be that it's new and hasn't 'bedded in' yet.

**kravenmore** · 21st July 2009, 11:54

it doesn't seem to actually leave contact with the road, more the feeling of bouncing. I've checked the book for the tyre pressure and it's all setup as stock, even tried a few psi less in the front but didn't make any noticable difference...

**avgas** · 21st July 2009, 12:12

Back to shop to get them to check it out.
I had it happen on the back - right before my wheel bearing disintegrated.

**slofox** · 21st July 2009, 12:14

Check the front wheel balance as well...

**CookMySock** · 21st July 2009, 12:18

The front suspension on these bikes isn't their strong point.

You can run really low tyre pressures on this bike and not really notice it, so feel free to experiment with pressures.

Is it jumpy on smooth roads? If it's going nod-nod-nod-nod on smooth road then you have a wheel-balance problem or a stuffed tyre.
http://www.kiwibiker.co.nz/forums/sh...t=hinky+shinko

If you are going to keep the bike for some time, it costs about $350 for the parts plus labour to fit some cartridge emulators to it. This will make a massive difference, and the rear shock can be swapped for something better as well.

Steve