My girlfriend has a 2003 750 katana and lately she has told me that whenever she slows down from highway speeds she starts to feel as she describes a speed wobble though the handlebars. She says that it starts when she hits about 80km/h after beng at over 100 km/h. She says it does not happen when accelerating. Any ideas what this could be?
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Deceleration wobble?
- Thread starter medicdon
- Start date
It is caused by an instability in balance in the front end. Most likely tire or wheel related - out of balance wheel assembly, or out of round tire. Alternatively, it could be the head bearings at the tripple clamps being loose or badly worn with some free play or slop.
FriendlyFoe
Well-known member
what are the odds the front tire has 15lbs of air in it?
Odds are good that it is fine. First thing I checked. The stearing bearing was replaced as part of a safety that was done in April this year when she bought it. The front tire looks fine to me so I'm pretty stumped here.
Check the bearings again. "New" doesn't mean "Failproof"
Improperly adjusted bearings could do it. Or as stated above a tire with uneven wear (which may be very hard to see).
09SV650S
Well-known member
Did it being a Bridgestone matter? (worn or not) And bc you put on a Michelin it went away or was it just the fact it was a new tire not the brand?
Check steering head bearings by lifting the front end off the ground either by
(1) centre stand and somebody on the rear end as counter balance weight
(2) having somebody pull the bike up on the side stand and rear wheel
(3) using a rear stand and a bottle jack under the bike
(4) bringing it to a shop
Check the steering head bearings by (while front end is off the ground)
(1) turning the front end from steering stop to steering stop and feeling for grittiness or resistance
(2) grabbing the forks at the bottom and pull/push and check for play (looseness and movement), there should be none
(3) while the wheel is up in the air, give it a spin to check for wheel bearing problems and brake pad binding
*note all this is dangerous if you don't know what you're doing as the bike isn't very stable with one wheel off the ground by any of the methods I mentioned.
Cupping is when a tire wears unevenly. It's more so "scalloping" like a shallow concave dishing of the tread.
Allan
(1) centre stand and somebody on the rear end as counter balance weight
(2) having somebody pull the bike up on the side stand and rear wheel
(3) using a rear stand and a bottle jack under the bike
(4) bringing it to a shop
Check the steering head bearings by (while front end is off the ground)
(1) turning the front end from steering stop to steering stop and feeling for grittiness or resistance
(2) grabbing the forks at the bottom and pull/push and check for play (looseness and movement), there should be none
(3) while the wheel is up in the air, give it a spin to check for wheel bearing problems and brake pad binding
*note all this is dangerous if you don't know what you're doing as the bike isn't very stable with one wheel off the ground by any of the methods I mentioned.
Cupping is when a tire wears unevenly. It's more so "scalloping" like a shallow concave dishing of the tread.
Allan
I am with Brian likely a scalloped tire. Could be bearings but check the tire first.
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