R reg sporty vibration trough the steering wheel at 60 mph then goes and back again at 70mph

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hello all thanks for looking and i hope u can help. i have just bought a sporty on a r plate but it seems to have a vibration i can feel thourg the steering wheel at 60 mph it goes at 65 then comes back again at 70 mph and goes at 75 can anyone help cos its quite extreame vibrathion but otherwise the car drives well and i love it once again cheers for any help..

best guess

check the rear prop shaft for play, other than that go through the whole steering linkage looking for play, bulges in tyres or unbalanced wheels, the list to check is big but its a process of elimination really, or drive at 50 lol

Full of ideas but no time to do them!!

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cheers

cheers mate thanks a lot im gonna have a busy weekend
lol

I'd be looking at prop UJs,

I'd be looking at prop UJs, front and rear.
Take off the front prop, then try it for a short drive

cheers

Rob

Prop but before that ..............

If you remove the prop, mark clearly the matching universal joint. They must be attached in same pairing or you will have even more wobbles!

Before starting any prop removal have you:
1. Checked if the wheel bearing is loose.
2. Had the wheels balanced - usual indication of a thrown weight is wheel wobble/steering vibration.
3. Check for top and bottom ball joint play
4. Check for steering linkage security and steering ball joint wear.