bad vibrate over 45mph

[dave7]

Hi there, been riding bike over 25yrs this is my first scooter, should have got one years ago !! But i need help!! its got very bad vibration over 45 mph though seat, handlebars, pulls up to 75mph okay, but just fills unsafe but as i said its my first scooter, its done 24k miles its a 1999 an400 i know its not new but is this normal plaese help. thanks dave

[SH125Paul]

Check the usual..
F and R tyre pressures etc, maybe slackening and re-tightening the front wheel axle and any pinch bolts etc.
Is the suspension adjustable - maybe a notch up or down at the back
Proper Burger owner will be along soon to help...

[The Bern]

Hello & Welcome.

Check the tread blocks on both tyres for uneven wear across the pattern, particularly look for "feathering" from front to back

[michaelphillips]

hello and welcome lad as above

[dave7]

Hi there, thanks for the replys, all tyre pressures good, slight play at rear wheel !! might be it, vibrating at 50mph, someone said have a look at rollers and belt but would it vibrate at higher speed ? regards dave

[Deleted User 4154]

1999 an400 i know its not new but is this normal

I had the same scooter and it's very definitely not normal!

As Bern said check tyres for uneven wear, also check pressures and for play in wheel & steering head bearings (I see you've found some in the rear one?). Have a look at the tyres themselves - any bulges etc.? Make sure the wheels are true & that there's no signs of missing balance weights (square glue/tape marks on rim).

Very much doubt it's the suspension settings, I once rode one of these that had a completely shagged rear shock and it didn't vibrate at all. I also doubt that it's the belt, but it's easy enough to whip the belt case off and have a look. That's worth doing anyway if you don't know the history of the scooter.

[michaelphillips]

just thought as well,. engine mountings bolts are secure, try tightening them got to be laid down for this job

[victor]

if all else fails gets lots of lub sell it as vibrator