Hello, Please can anyone help me..... I have a 2006 Multistrada 1000 S Ds with only 13,000 miles on the clock. I've recently replaced the timing belts and I replaced all the bearings as well. The problem I have is that the belts do not run true on the pulleys when the engine is running. They come off the pulleys by 5mm. I've set the belts to the correct tension and even loosened them off a bit to to see if this makes a difference, which it doesn't. Both pulleys are in line with each other as I've put a straight edge across both of them. Any help with this would be much appreciated. Thanks...
I will send you a direct message in a minute, but first of all, was it running okay before you changed the belts and other things? Did you get a chance to see that the belts were running "true" is what I'm saying.
Hi Chris, good question... the bike was running ok but the answer is I can't remember plus I didn't pay much attention to the position of the belts on the pulleys before I took them off...
so I think there's a good chance we can say that it's something that you've done and that is a good start, because you can retrace how you've reattached the belt tensioner fixings etc and compare this with pictures on the Internet, and even hopefully find a procedure on YouTube for comparison, to Try and find out what has happened here. You are absolutely happy that those are the correct width belts?
Are the idler rollers "barrel shaped"? Some rollers have a high spot in the middle to assist tracking of the belt. If they wear flat tracking can drift.
I changed the belts on a 900SS for somebody where the outside edge of the Horizontal belt was being shredded by the flange on the Cam Pulley. The belt was being forced outward off the Pulley because the plain replacement Rollers fitted, which in that case were simply bearings, were too narrow and the edge of the belt was hanging off the side of them.
I don't understand your second paragraph, it was a case of the wrong bearings being fitted? I have used "Simply bearings" several times in the past, and they supplied the correct bearings.
Chris Hi Yes, I know you know this, but for the benefit of others the plain Pulleys are a pair of bearings side by side, and the plain side of the belt runs directly on their outer race. The bearings fitted were too narrow, so the belt overhung them by possibly 5-6mm and that was enough to force the belt sideways so it was constantly being corrected by the toothed Pulley Flanges which shredded the outer edge. Strangely the Vertical cylinder bearings were the right width, only those on the Horizontal Cylinder were too narrow which should have been obvious to whoever fitted them.
Thanks Chris The Plain rollers are not in the images, but in all the images there does look to be a witness mark on the plain side of the belts a few mm in, which looks like the plain side could be running on an edge. Particularly in image 2 and 4. That's either a result of them running off the toothed pulleys, or causing them to run off the toothed pulleys.
The flanges on the bottom pulleys should keep the belts in line. If they are running off something is out of true. The tensioner pulleys is where I'd be looking.
Thanks everyone for all your help today... I'll take a look at the tensioner pulleys tonight and let you what I find. To be continued..................
Judging by pics there appears to be belt rubbing on the outer edge? Still looking like a tracking problem. If not rollers a pissed shaft? I would check your rollers again Livelife008.
