Hi - I had some new vibrations appearing from 4000 rpm upwards and could feel them through the bars & footpegs. Initially I thought they were engine related and possibly main bearings on the way out. Anyway after some investigation I tracked the vibration down to a failing rear wheel bearing on the brake disc side. I have replaced all four bearings (two in the wheel hub & two in the sprocket carrier) and my vibration is gone. I will fit a new chain & sprockets next as these were also showing signs of wear. Here are some pics that may be of use, including the SKF bearing reference numbers Wheel bearing is 25mm ID x 47mm OD x 12mm Wide Carrier bearing is 30mm ID x 55mm OD x 13mm Wide ( see pics for reference numbers ) HAPPY RIDING
Wheel Bearings I forgot to mention - The bearings came from 'simmplybearings.co.uk' - excellent service and only 35 quid for all four. Recommend this company - very efficient service.
Yeah, I find it necessary to keep an eye on the wheel bearing as there are no dust seals protecting these bearings. New bearings every second tyre change appears about right. I had minor vibrations, mostly in the mirrors. I found the swing-arm spindle/shaft worn and rusted. I replaced these, along with the front sprocket, and found the bike much smoother. Always grease the swing-arm pivot during normal maintenance. The arm does not need to be removed, just push the spindle to one side and then the other side. The seal on the drive side is very important to be in good condition. As the chain rotates in wet conditions it power washes the area around the drive sprocket with water from the rear tyre, and will infiltrate the swing-arm needle bearings ruining them. Ask me how I know! Pat
A digression, but ....... I notice that you have quite a lot of balance weight on your rear wheel .....looks like at least 60g. I recently rebalanced my rear wheel, which is shod with a 6000m old Michelin PR2 that still looks good for another couple of thousand miles. The original balance weight fitted from new was 10g, but I found that I needed at least 70g to rebalance the wheel, despite refitting the tyre with its (measured) heavy point coincident with the light spot on the bare wheel. I was surprised at how much the balance had changed. ...and my wheel bearings are fine so that wasn't the cause (though I guess it could be in your case). So I was wondering whether your large cluster of balance weights were fitted when the tyre was new, or whether the wheel has since been rebalanced....?
The balance weights have been on since the tyre was fitted. I just had a new front tyre, but the rear still has some life left in it yet. I will get the rear wheel rebalanced when I change the tyre. Thanks for the reply.
