Chuck Posted December 2, 2016 Posted December 2, 2016 Shamelessly stolen from WG.. http://wildguzzi.com/forum/index.php?topic=87377.0 4
BigBlock Posted December 2, 2016 Posted December 2, 2016 Interesting! Now I know why the drive shaft is marked or should be before dismantling.
Scud Posted December 3, 2016 Posted December 3, 2016 I recently noticed that I had misaligned my driveshaft on reassembly (just by one tooth). The video made me feel much better about the effort required to correct it. I knew there was a reason for the alignment, but never understood the reason before.
Baldini Posted December 13, 2016 Posted December 13, 2016 Don't rely on the paint marks Guzzi put on - mine was out even tho lined up w paint marks.
Chuck Posted December 13, 2016 Author Posted December 13, 2016 Don't rely on the paint marks Guzzi put on - mine was out even tho lined up w paint marks. True, Rosie's paint marks were off one tooth.
czakky Posted December 14, 2016 Posted December 14, 2016 How does a guy tell? Sight down the drive shaft like a 2x4? Take it to some u-joint wizard in rural WI?.... 1
docc Posted December 14, 2016 Posted December 14, 2016 How does a guy tell? Sight down the drive shaft like a 2x4? Take it to some u-joint wizard in rural WI?.... Truly - I've always trusted my marks and thought the yokes looked "okay." But, after looking at the variation in drive speeds on the video, one tooth out would make the bike a tire eater! ( In my case, that could still be the loose nut attached to the throttle cable . . . )
docc Posted December 15, 2016 Posted December 15, 2016 Okay, so, again, how to tell if the factory marks are (one tooth) off?
Baldini Posted December 15, 2016 Posted December 15, 2016 The UJ's should sit in the same plane - so if you look at drive shaft end to end, UJ surfaces are parallel. I'd post a pic but I dunno how anymore (does the pic have to be already on line?) Does this help? (Driveshaft w UJ either end viewed from above) > XXXXXX XXXXXX XXXX _________________________________ XXXX XXXX O_________________________________O XXXX XXXX XXXX XXXXXX XXXXXX
docc Posted December 15, 2016 Posted December 15, 2016 Pretty hard to see on the bike, yeah? I'll add a link to the Wheels Off Maintenance Checklist.
bbolesaz Posted December 16, 2016 Posted December 16, 2016 Is it just me, or is the driveshaft out of phase at the beginning and end of the video? It only looks correct just before they move it to make it incorrect. To be in phase, the yokes of the U joint are on the same plane, yes?
stewgnu Posted December 16, 2016 Posted December 16, 2016 Is it just me, or is the driveshaft out of phase at the beginning and end of the video? It only looks correct just before they move it to make it incorrect. To be in phase, the yokes of the U joint are on the same plane, yes? Hey, you're onto something there... i see it too. If the shaft is misaligned on the bike would there be weird handling when changing speeds? How is it manifested?
pete roper Posted December 17, 2016 Posted December 17, 2016 If misaligned the driveshaft will wind up and down like a big torsion spring puting high loads on the splines and pinions in the transmission but also loading and unloading the reaction rod making the suspension incapable of working correctly! The forces are quite high. I've seen the splined part of a bevelbox pinion twisted off by them after a long period of misalignment! Pete 1
stewgnu Posted December 18, 2016 Posted December 18, 2016 Are you saying it will ride, albeit not perfectly? Or that no sane human could tame it?
pete roper Posted December 18, 2016 Posted December 18, 2016 It'll ride like a three legged rhinoceros with a spear up its chuff. 1
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