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I just tried this.
If you're not mechanically inclined, or tend to be ham-fisted [Like I am :rolleyes ], Better to just let the Yamaha mechanics deal w. this.
Thought I'd try to save a $ and learn something at the same time. Oh well:
Here are some observations and questions.
1. As per FZ6 Owner's Manual: Axle Nut s/b tightened (post slack adjustment) To: 87 Ft-Lbs Torque. Well, my torque wrench shows torque applied both when you loosten and tighten. Torque to loosten the dealer-set Axle Nut was well over 115 Ft-Lbs... ?
So either they over torqued it @ 600mi service or the setting they give in the Manual is under-stated... ?
2. Torque setting for the Tensioning Lock Nut: 11 Ft-Lbs... How is it even possible to get a torque wrench onto a lock nut that small, esp. w. Slack Adj. Nut right in front of it?. I just tried to go by feel, based upon the amount of pressure to loosten it in the first place.
Next came the battle: How much are you supposed to loosten the Axle Nut before you attempt to adjust chain slack? I loostened it maybe two or three full revolutions, but I think that was too much.
As far as chain slack measurement goes: Found it pretty difficult to measure that from instructions in the owner's manual, but did my best. What I don't understand is how much pressure we're supposed to apply to the chain to take the slack measurement. If I use very light finger pressure that gave a slack measurement of between 1" and 1.5" upward (after I tightened it) measuring by radial center of a given chain link. If I applied more pressure, then I could easily pin the chain against the bottom of the swing-arm, so I'm confused as to whether I'm over or under factory recommended chain slack setting at this point.
BTW: Manual says slack measurement should be between 1.77" & 2.17".
It doesn't state if that is when measuring outsides of a given chain link or a single center of a link.
Finally, getting the axle allignment correct again was a real bit-CH. Maybe because I loostened the axle nut too much to begin with?
Trying to use those axle allignment hash marks is tough because the Axle Nut on the left is a different diameter from the one on the right. Also the washer underneath the Axle Nut can move fwd or backward a bit, so it cannot be relied upon to take the measurement either. In the end, I counted the number of threads exposed on the tensioning bolts, aft of the tension lock nut.
Turns out that I needed a big crescent wrench on the Right Side Axle Nut while tightening down the Left Side, otherwise the whole axle turned with the torque applied from the left.
Anyway, I'm still going to bring it to the Yamaha dealer to check the chain slack and axle allignment before any long rides. Looking back on this, I think I'll prob. bring it in to have the slack adjusted from now on, or find a local mechanic to show me the right procedure before re-attempting this.
Having a Cycle Jack, the proper tools and being in a garage rather than your apartment complex parking lot in 90 Deg. F. heat (I'm a renter...) would make this adjustment a ton easier to do.
Those are my observations. Sorry if this was too long-winded.
If you're not mechanically inclined, or tend to be ham-fisted [Like I am :rolleyes ], Better to just let the Yamaha mechanics deal w. this.
Thought I'd try to save a $ and learn something at the same time. Oh well:
Here are some observations and questions.
1. As per FZ6 Owner's Manual: Axle Nut s/b tightened (post slack adjustment) To: 87 Ft-Lbs Torque. Well, my torque wrench shows torque applied both when you loosten and tighten. Torque to loosten the dealer-set Axle Nut was well over 115 Ft-Lbs... ?
So either they over torqued it @ 600mi service or the setting they give in the Manual is under-stated... ?
2. Torque setting for the Tensioning Lock Nut: 11 Ft-Lbs... How is it even possible to get a torque wrench onto a lock nut that small, esp. w. Slack Adj. Nut right in front of it?. I just tried to go by feel, based upon the amount of pressure to loosten it in the first place.
Next came the battle: How much are you supposed to loosten the Axle Nut before you attempt to adjust chain slack? I loostened it maybe two or three full revolutions, but I think that was too much.
As far as chain slack measurement goes: Found it pretty difficult to measure that from instructions in the owner's manual, but did my best. What I don't understand is how much pressure we're supposed to apply to the chain to take the slack measurement. If I use very light finger pressure that gave a slack measurement of between 1" and 1.5" upward (after I tightened it) measuring by radial center of a given chain link. If I applied more pressure, then I could easily pin the chain against the bottom of the swing-arm, so I'm confused as to whether I'm over or under factory recommended chain slack setting at this point.
BTW: Manual says slack measurement should be between 1.77" & 2.17".
It doesn't state if that is when measuring outsides of a given chain link or a single center of a link.
Finally, getting the axle allignment correct again was a real bit-CH. Maybe because I loostened the axle nut too much to begin with?
Trying to use those axle allignment hash marks is tough because the Axle Nut on the left is a different diameter from the one on the right. Also the washer underneath the Axle Nut can move fwd or backward a bit, so it cannot be relied upon to take the measurement either. In the end, I counted the number of threads exposed on the tensioning bolts, aft of the tension lock nut.
Turns out that I needed a big crescent wrench on the Right Side Axle Nut while tightening down the Left Side, otherwise the whole axle turned with the torque applied from the left.
Anyway, I'm still going to bring it to the Yamaha dealer to check the chain slack and axle allignment before any long rides. Looking back on this, I think I'll prob. bring it in to have the slack adjusted from now on, or find a local mechanic to show me the right procedure before re-attempting this.
Having a Cycle Jack, the proper tools and being in a garage rather than your apartment complex parking lot in 90 Deg. F. heat (I'm a renter...) would make this adjustment a ton easier to do.
Those are my observations. Sorry if this was too long-winded.