Join Date: Nov 2009
Location: Lander, Wyoming
Just for reference material, does the old chain show 'Red Rust Dust' on the outside circumference of the 'o'-rings? If so, that is an indication that the grease inside the pin and bushing which is "sealed in" with the 'o'-ring is Worn-Out! Therefore, frequent adjustment required and accelerated sprocket wear.
I'll suggest that one should usually replace the Front sprocket with a New Chain. The rear sprocket has 3 times as many teeth as the front so the wear rate is different.
The standard 106 link chain length is correct with a 16 tooth front sprocket.
Modify at "YOUR OWN RISK"!
Still riding my 1987 KL650-A1. 85,000+ miles & counting