Thanks bob so much for taking the time to make these two videos so informative im changing a chain on my new gsa in two weeks and will be laying on thr floor with this playing while i swear and take knuckles off and will have you along for the ride 👍 thanks again
Super! Glad it was a good prep for ya. Good luck with the change. Nothing terribly tricky aside from that strange circlip and visualizing that thing in the bottom / hole part.
Great video. Allot of people think that the jt logo on the rear sprocket face out. But it good to measure up. I change my s1000xr gen2 2020 rear sprocket was jtr10.45 and the lip side faces to the inside and the flatside faces out.
Yeah I try real hard to look for asymmetric things and take care to lay them down in a particular way or right next to the new one in the same manner etc.
Well, I always love others checking my accuracy! So I went back to the repair manual and I show 125 Nm - not 115 and not 100. I suppose they could have changed it to a lower figure. Any chance you mean 100 ft-lbs ? That'd be pretty close to 125 Nm
Interesting! I just downloaded the 2019 rider manual and it ALSO shows 100Nm as you say. BMW has a discrepancy! :) And my 110 was wrong but apparently a COMPROMISE. Ha.
Two minor omissions: The front sprocket is not symmetrical and you don’t note that the wider side goes inside, and The bike I worked on had antiseize on the gearbox output shaft splines which would be a vary good idea on two close fitting steel parts.
At 4:30 I note the large shoulder and it should face outward. Are you noting something different than that? Anti-seize sounds like a good idea. I didn't note any on mine so I didn't consider it in re-assembly. Good call.
Any issues at all with more noise (a whine) from the chain/sprockets after replacement? I used the same chain and rear sprocket, but opted for the standard front sprocket and not the cushioned one on my '20 850GSA. There was really no noise at all from the driveline until replacing the chain and sprockets, which was very simple. Sprocket orientation, chain alignment, and tension are correct. BTW, great videos. I find them to be an excellent resource.
No noises from my drive train. My first guess is probably yours as well - take a very critical look at alignment of the front sprocket as it relates to the inbound/outbound chain. Also the orientation of the front sprocket flipped or not - it would lead to the same misalignment, ultimately. Good luck finding it and please report back what you find. Curious. Oh - I'd also suggest going link by link by link and feel how easy or hard it is to pivot each link's joint. If you find one that's extra stiff, that could be a cause. Last thought would be to re-install your old chain or sprocket one by one to validate who the culprit is.
@@bobwolff68 I totally agree with the importance of the chainline alignment and checked it several times. Sprockets are installed properly too. I put the original BMW sprocket and chain back on, leaving the new JT rear sprocket in place. The bike was quiet again, so I sprung for a new BMW front sprocket ($$$, ouch!) thinking the front JT was the culprit. Nope, the whining is back. Next I pulled off the new DID chain and tried a JT chain...same thing..whining. Super frustrating for what is typically straight forward and easy maintenance.
Wow! Well I'm so glad you did all the troubleshooting on this, but not having a good REASON is frustrating and maybe a bit concerning? Please check in when you find out more - I'd be happy to know where you land on this as would others. GOOD LUCK.
Thanks it is a amazing video and very useful. Where I can found the torque specs of each bolt? I have a F900XR and I was thinking of use the same torque that you use.
Glad it's useful! I'd say there are likely some online resources / boards where you would find a lot of torque specs for the XR. Or purchase the repair manual from BMW for about $100. But I'd also say that your instinct is probably pretty right on. BMW tries to be pretty consistent in engineering so I'd expect similar specs for similar functions. YMMV.
Thanks for your video I'll use it. Just a thought though, when you re tighten the T60 center guard bolt to 200 nM; wouldn't you want your torque wrench handle pointing toward the front axle, allowing you to press down and driving the force towards the rear to preclude dumping the bike off the center stand? Totally fear that bike coming off that center stand when re tightening the rear axle bolt.
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this video is worth gold. Thanks!
Wow - thanks! Love to hear that. :)
Thanks bob so much for taking the time to make these two videos so informative im changing a chain on my new gsa in two weeks and will be laying on thr floor with this playing while i swear and take knuckles off and will have you along for the ride 👍 thanks again
Awesome - love hearing this kinda stuff. Makes my day. You'll do great on the chain change. It's not an awful deal.
Thanks for this video. I have a 2020 F850GS I need to change the chain and sprockets on. This was definitely helpful.
Super! Glad it was a good prep for ya. Good luck with the change. Nothing terribly tricky aside from that strange circlip and visualizing that thing in the bottom / hole part.
Great video. Allot of people think that the jt logo on the rear sprocket face out. But it good to measure up. I change my s1000xr gen2 2020 rear sprocket was jtr10.45 and the lip side faces to the inside and the flatside faces out.
Yeah I try real hard to look for asymmetric things and take care to lay them down in a particular way or right next to the new one in the same manner etc.
Thanks a lot for those two videos full of details. Great job. On my F850GS from 2020 torque of the rear axle nut is 100 Nm.
Well, I always love others checking my accuracy! So I went back to the repair manual and I show 125 Nm - not 115 and not 100. I suppose they could have changed it to a lower figure. Any chance you mean 100 ft-lbs ? That'd be pretty close to 125 Nm
I mean 100 Nm.
Page 182 shown (188 on the pdf) "F_0B09_RM_0520_01.pdf" Rider's Manual.
Anyway thanks a lot for your job.
Interesting! I just downloaded the 2019 rider manual and it ALSO shows 100Nm as you say. BMW has a discrepancy! :) And my 110 was wrong but apparently a COMPROMISE. Ha.
My manual says 100nm...the tensioners are marked with 125nm though!
Two minor omissions:
The front sprocket is not symmetrical and you don’t note that the wider side goes inside, and
The bike I worked on had antiseize on the gearbox output shaft splines which would be a vary good idea on two close fitting steel parts.
At 4:30 I note the large shoulder and it should face outward. Are you noting something different than that? Anti-seize sounds like a good idea. I didn't note any on mine so I didn't consider it in re-assembly. Good call.
Great video as always! Thanks for sharing!
Thanks!
Brilliant vid and so informative!
Super glad to hear it!
Any issues at all with more noise (a whine) from the chain/sprockets after replacement? I used the same chain and rear sprocket, but opted for the standard front sprocket and not the cushioned one on my '20 850GSA. There was really no noise at all from the driveline until replacing the chain and sprockets, which was very simple. Sprocket orientation, chain alignment, and tension are correct.
BTW, great videos. I find them to be an excellent resource.
No noises from my drive train. My first guess is probably yours as well - take a very critical look at alignment of the front sprocket as it relates to the inbound/outbound chain. Also the orientation of the front sprocket flipped or not - it would lead to the same misalignment, ultimately. Good luck finding it and please report back what you find. Curious.
Oh - I'd also suggest going link by link by link and feel how easy or hard it is to pivot each link's joint. If you find one that's extra stiff, that could be a cause. Last thought would be to re-install your old chain or sprocket one by one to validate who the culprit is.
@@bobwolff68 I totally agree with the importance of the chainline alignment and checked it several times. Sprockets are installed properly too. I put the original BMW sprocket and chain back on, leaving the new JT rear sprocket in place. The bike was quiet again, so I sprung for a new BMW front sprocket ($$$, ouch!) thinking the front JT was the culprit. Nope, the whining is back. Next I pulled off the new DID chain and tried a JT chain...same thing..whining. Super frustrating for what is typically straight forward and easy maintenance.
Wow! Well I'm so glad you did all the troubleshooting on this, but not having a good REASON is frustrating and maybe a bit concerning? Please check in when you find out more - I'd be happy to know where you land on this as would others. GOOD LUCK.
Thanks it is a amazing video and very useful. Where I can found the torque specs of each bolt? I have a F900XR and I was thinking of use the same torque that you use.
Glad it's useful! I'd say there are likely some online resources / boards where you would find a lot of torque specs for the XR. Or purchase the repair manual from BMW for about $100. But I'd also say that your instinct is probably pretty right on. BMW tries to be pretty consistent in engineering so I'd expect similar specs for similar functions. YMMV.
Thanks for your video I'll use it. Just a thought though, when you re tighten the T60 center guard bolt to 200 nM; wouldn't you want your torque wrench handle pointing toward the front axle, allowing you to press down and driving the force towards the rear to preclude dumping the bike off the center stand? Totally fear that bike coming off that center stand when re tightening the rear axle bolt.
Not enough coffee. Nothing is true about this comment except how good it was. Disregard the rest. Greg
No worries! Coffee is GOOD. ;)