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Old 09-14-2018, 01:33 PM   #1
Seb2112
 
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Bandit 1250 wobbling ''low speed''

Ok...here's the situation...Bandit 1250 '08 with 142000km (88000mi). Wobbling occurring between 65 and 75 km/h (40 - 50 mph).

What has been checked:

- front wheel balancing and alignement (front wheel not crooked)
- steering bearing - ok
- fork oil changed - ok
- fork lowering - ok
- rear shock changed (used but with low mileage and not leaking) - ok
- swingarm bearing and bushing - ok
- rear tire alignement - ok

Both tires (Michelin PR4) have only 10000km (6000mi) on it...a small bit of cupping in the front...so no issue with that...

Still wobbling with luggage on...so weight in back, front lifting up a bit...

Any clues???

Still figuring out what could cause this situation...

Any help or thoughts would be greatly appreciated...

Thanks!
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Old 09-14-2018, 01:41 PM   #2
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Re: Bandit 1250 wobbling ''low speed''

Front tire pressure

Engine mounting bolts
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Old 09-14-2018, 02:25 PM   #3
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Re: Bandit 1250 wobbling ''low speed''

My front PR4 was already behaving badly at 7750mi. I think the aggressive sipes/grooves made for faster dry wear, and it was badly cupped. When I finally replaced it at 8300mi, it could have gone another 1000mi, but it had become a complete buzzkill. Went back to a PR2 and have been happy ever since.

So I think it's your front tire, and the affect is magnified by the luggage.
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Old 09-14-2018, 03:56 PM   #4
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Re: Bandit 1250 wobbling ''low speed''

Quote:
Originally Posted by DancesWithCurves View Post
So I think it's your front tire, and the affect is magnified by the luggage.
This. My VFR 800s, used to do the same thing. A new front tire solved it every time. Tire pressure did not seem to have much impact on it.
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Old 09-14-2018, 04:39 PM   #5
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Re: Bandit 1250 wobbling ''low speed''

front tire x3
although there was a friend of mine had a similar experience on a bike that had been heavily 'wheelied'. It's not very likely at all but check the stem head/neck for cracks.
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Old 09-16-2018, 06:55 AM   #6
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Re: Bandit 1250 wobbling ''low speed''

Hi Guy!

Thanks for the infos! I’ve re-checked everything and we finally found a barely perceptible «*click*» on the steering stem and some movement...seems that the lower bearing needs to be changed...might as well change both bearings...
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Old 09-18-2018, 06:30 PM   #7
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Re: Bandit 1250 wobbling ''low speed''

Tire..My FJR wobbles when it's time for a front tire. I never need to check
thread depth, wobble-new front tire time.
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Old 09-19-2018, 04:38 PM   #8
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Re: Bandit 1250 wobbling ''low speed''

Quote:
Originally Posted by Seb2112 View Post
Hi Guy!

Thanks for the infos! I’ve re-checked everything and we finally found a barely perceptible «*click*» on the steering stem and some movement...seems that the lower bearing needs to be changed...might as well change both bearings...
Glad you got it sorted out. Well done.
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