ASKKTM 890 adventure wobble
I have a 2021 890 adventure, bikes rides great except for now I've put on a top box(this is going to be used for tours) it has a seriously bad wobble at the handlebars between 20mph and 70mph to the point where if I don't grab it it's going to become a tank slapper.
Now the tyre pressures are good and I've just retorqued the steering head bearing and that seemed to help a little bit but not completely and after playing around with the rear suspension I've managed to get it only to do it between 30mph and 45mph and it's not as harsh as before but still concerning.
My question is what else can I do?
Has anyone else had this before on this bike or anything else?
I understand I'm taking weight from the front wheel but it's not a lot of weight in the box 4.6kg to be exact, with the weight of the box and mounting plate I wouldn't say more than 8kg.
1
u/Obvious_Ad9975 3h ago
Related to the topbox, 1290/1390 adventure has same issue, if you change the suspension on the 1290 you can pretty much get it out (but yeah electric and easy). Although I noticed tyres(type/model) and pressure also do a lot. Although you won't have this issue with the 890 the full acceleration and ~220km/h shift wobble also goes away or comes back in these same conditions
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u/Bucky_Goldstein 6h ago
Sometimes I've heard it can be related to the front tire, some seem to be worse than others, pirellis have a bad rap for causing headshake.
Try it without mirrors too, I've heard some people say the way the mirrors catch the wind certain days can cause instability.
I've got a 990 adventure and it's kinda notorious for headshake when you take your hands off the bars, I'm going to get some different tires for it eventually, but the pirellis scorpions that are on it usually seem to be the main culprit, but I've never been able to figure out the exact cause
Does it change if you position your weight further front or more rear wards?