Just geting back into dirt bikes after a 20 year gap (lots of street bikes in between though!) and need to know how to set the rear sag correctly on my '87 XR600. I have the factory service manual, but it says to refer to the owners manual on how to correctly set it (I'm 230lbs in gear). So...how do I set this? Also, the service manual says to set chain tension by supporting the rear wheel off the ground and mesure the slack in the chain at the mid-point on the upper chain - it should be between 1 3/8" - 1 3/4". Does this sound right or ....? Thanks for any help.