Handlebar wobble, what do you reckon?

[donniemateno]

After seeking advice ive been told id get lots of opinions if I post in the workshop

I picked up a CBR600 and its all good but have come across a small issue. When I ride the bike above 40 MPG roughly I get a SMALL amount of handle bar wobble. as I speed up you can feel in in the bars. below 40 its fine

After research I have found it can be :
a unevenly worn tyre
unbalanced wheel
warped disc
or a seized caliper

what do you think it could be? as I would of thought a disc or caliper I would feel at all speeds not just high, Im leaning towards a unbalanced wheel ( as this is the cheapest to get check out too) . however I do have a weight on the wall but this does not mean its balanced

Its also just had an MOT yesterday before I picked it up, so im guessing things such as alignment and seized caliper etc should of been picked up and advised?

any advice appreciated.
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Current bike: Honda CBR 600 F3
Previous bikes: Honda XR 125L5 , BMW 800 ST, Honda CB500

[Sako]

Parkinson's.

[Wafer_Thin_Ham]

Steering head bearings.
Could also be a rear bearing issue too.
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My Flickr

[J.M.]

Checked your tyre pressures?

Incorrect pressures produces notable bar wobble.
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2004 R1 & 2018 XSR900

[Islander]

Start with the simple stuff. Tyre pressures and tyre wear. Is the rear wheel correctly aligned?

[ginny]

If its got a topbox, it's that.

[donniemateno]

Thanks to those with helpful replies

i have checkd pressures front eas low only 20 psi i have pumped up still have the issue

the rear tyre is new and fited only wednesday morning
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Current bike: Honda CBR 600 F3
Previous bikes: Honda XR 125L5 , BMW 800 ST, Honda CB500

[Fizzer Thou]

I would be thinking headrace bearings as well.These are easily checked.

Did you buy the bike from a dealer/shop that also did the MoT?

If so I would be taking the bike back to the place.

If private purchase did you get a receipt stating 'Sold as seen'?
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Just talk bikes.What else is there?

Always have a 'Plan B'

[mysterious_rider]

To test the headstock bearings, sit on the bike and hold the front brake, push forwards, hard. If you feel clicking this is a bad sign.

Also, put the bike on it's side stand, go to the left of it, pop your foot behind the stand, pull on the frame and get the front end to lift up (so it's weight is on the sidestand) then turn the bars right, and let them drop left of their own accord (gravity) if the movement is notchy, or they stick. You need new bearings.
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KAWASAKIIIII

[R1stu]

[mysterious_rider]

[Fizzer Thou]

I recollect a motorcycle magazine showing how easy it was to have stability problems with overloaded top boxes and the problem of weight distribution.They placed house bricks in the box and performed a series of acceleration tests.I thought at the time that the rider was crazy,but it was all done under controlled circumstances.

The magazine also did a test with handlebar fairings and showed how they could cause instability problems.
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Just talk bikes.What else is there?

Always have a 'Plan B'

[mentalboy]

Doesn't seem to give the Zed any problems with a top box and all the junk I've stacked in it in the past.

Would incorrect bar ends have this effect - Mine have always had the right ones on but I should imagine that if you removed the stock ones and replaced with lighter/left them off that you'd get some grief.
I'd be surprised if steering head gave that kind of noticeable problem at 40, unless it's proper mullered.
Does sound as though you need to have a quick bearing check on steering/ suspension problems, I'd be starting at the hubs and working inboard if it were me.
+1 for alignment.

Warped discs will pulse through the lever when you use them.
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Make mine a Corona.

[donniemateno]

I bought from a dealer sold as seen but it had the mot with no advisories.

Hope theyve not given me a dodgy one!
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Current bike: Honda CBR 600 F3
Previous bikes: Honda XR 125L5 , BMW 800 ST, Honda CB500

[Islander]

[donniemateno]

Btw i dont have a topbox
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Current bike: Honda CBR 600 F3
Previous bikes: Honda XR 125L5 , BMW 800 ST, Honda CB500

[donniemateno]

I emailed garage and got this as a reply

The bike rode fine and was road tested The rear tyre can effect handling until its bed in Also check the front and rear tyre pressure this will effect handling 30 PSI front and 36 PSI rear other than that check rear wheel alinement through the chain adjusters also could be worth getting the front tyre balanced
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Current bike: Honda CBR 600 F3
Previous bikes: Honda XR 125L5 , BMW 800 ST, Honda CB500

[mentalboy]

When you buy 'sold as seen' most garages will have had a quick look over the machine and decided that putting any issues right/ blinging up paint etc will strip the profit from their sale. ie the bike's not worth ( to them) spending time/ parts on it.

If they are hinting at wheel issues I'd be inclined to have a good look at the wheel bearings once you've done what they suggest if that hasn't solved the problem.

I'm always very careful when buying 'sold as seen' as there is usually a good reason why they don't want to sell bike with a warranty, etc. If you find that there is something dangerous on the machine then most places I've dealt with do attend to the parts but I don't know where you stand legally with regards their obligations.
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Make mine a Corona.

[mudcow007]

if the bike has been stood for a while on a side stand could that make the front tyre deform causing it to wobble?

im guessing though?!?

[ginny]

[ginny]

[donniemateno]

well im going to take to my local garage tomorrow and have the tyres checked for balance tomoz as I tried the suggested apply the brake on the bike and really push on the bike and turning the handle bars no obvious knocks etc

the bike had been sat at the garage for a few months apars and the ownder before hand had only done 1000 miles in 3 years
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Current bike: Honda CBR 600 F3
Previous bikes: Honda XR 125L5 , BMW 800 ST, Honda CB500

[Fizzer Thou]

If you are not happy with the bike you can take it back and demand your money be returned,whether they gave you a warranty or not.

Just mention Trading Standards and the Sale of Goods Act
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Just talk bikes.What else is there?

Always have a 'Plan B'

[donniemateno]

took to a garage this morning, brakes and bearing ok, from looking at it he says the rear tyre hasnt been fitted properly as the yellow dot? on the ttyre is the lightest bit of the tyre and should be by the valve not randomly fitted as it is on mine

the front tyre he said he doesnt understand why I have 3 sets of weights on it, so that will need balancing too
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Current bike: Honda CBR 600 F3
Previous bikes: Honda XR 125L5 , BMW 800 ST, Honda CB500

[P.addy]

I have heard that yellow dot/ red dot a few times before but every car that was at the old dealership I worked at ignored this, no one died... So i'm kinda guessing its a load of turd