CINDYLBEAU
New member
Greetings,
After 73,000 miles on my 2002 R1200C (shaft drive), I have moved on to a 2021 750GS (lowered). This is my third bike but the first with a chain. My bike was slightly used when I purchased it (521 miles) and I now have 1,675 miles on it. It had its 600 mile service done by the BMW dealer just before I picked it up.
I have read through the post by "drneo66" titled "F-Twins Tech - F650/700/800 - Setting Proper Chain Tension." This is a great post but I still had questions. I went to YouTube and watched several videos. This resulted in more questions.
1. Why would the chain sag CHANGE as the rear tire is rolled forward or backward? ("find the spot with the lowest sag")
2. Why must the measurement be done on the side stand? (I have installed an SW-motech center stand). Since the chain is on the low side of the bike, this makes reading the measurement awkward.
3. Most of the YouTube videos suggest that before measuring the sag I should shift the bike into 1st and roll forward to engage the chain. True? This seems to reduce the chain sag....
3. So, assuming I measure the chain sag while on the side stand, do I make the adjustments while on the center stand so that the axle doesn't have different forces on each side? (if leaned over on the side stand, doesn't that affect the wheel position on the axle if the axle nut is loose?)
4. When I have the bike on the center stand and rotate the rear tire, the chain periodically rubs the edge of the catalytic converter. I do not hear any rubbing when I "paddle walk" the bike in neutral (engine off). There is a slight wear mark where the chain ribs the cat. Is this something I need to address right away with a BMW dealer?
I look forward to hearing the advice of others.
Thank you!
Cindy
After 73,000 miles on my 2002 R1200C (shaft drive), I have moved on to a 2021 750GS (lowered). This is my third bike but the first with a chain. My bike was slightly used when I purchased it (521 miles) and I now have 1,675 miles on it. It had its 600 mile service done by the BMW dealer just before I picked it up.
I have read through the post by "drneo66" titled "F-Twins Tech - F650/700/800 - Setting Proper Chain Tension." This is a great post but I still had questions. I went to YouTube and watched several videos. This resulted in more questions.
1. Why would the chain sag CHANGE as the rear tire is rolled forward or backward? ("find the spot with the lowest sag")
2. Why must the measurement be done on the side stand? (I have installed an SW-motech center stand). Since the chain is on the low side of the bike, this makes reading the measurement awkward.
3. Most of the YouTube videos suggest that before measuring the sag I should shift the bike into 1st and roll forward to engage the chain. True? This seems to reduce the chain sag....
3. So, assuming I measure the chain sag while on the side stand, do I make the adjustments while on the center stand so that the axle doesn't have different forces on each side? (if leaned over on the side stand, doesn't that affect the wheel position on the axle if the axle nut is loose?)
4. When I have the bike on the center stand and rotate the rear tire, the chain periodically rubs the edge of the catalytic converter. I do not hear any rubbing when I "paddle walk" the bike in neutral (engine off). There is a slight wear mark where the chain ribs the cat. Is this something I need to address right away with a BMW dealer?
I look forward to hearing the advice of others.
Thank you!
Cindy