Knot Tying
Four Knot (4) Versus Two (2) Knot Stringing:
There have been many different opinions on the subject. For every knot that is tied, there is some tension loss. This would lead to the conclusion that two (2) knot is better than four (4) knot. However, the longer the string, the more it stretched, which would lead to the conclusion that one (1) long piece would stretch more than two (2) shorter pieces. So, does the stretch of the longer string loose more tension than the loss of tying four knots, two (2) shorter pieces of string!

Four Knot
For Four (4) knot stringing, a packet of strings needs to be cut into two (2) separate pieces where one string is longer and the other shorter. Mains requires slightly longer string than the Crosses.

Open the Packet of strings and find the center. Take additional, approximately two (2) feet to the long side (Mains) and cut the string. The remaining shorter side will be used to string the Crosses.

Start Mains first. Feed the string through the bottom hole on the Left side of the racket handle and up to the left-of-center hole at the top. Over to the Right of center hole at the top and down to the right side of racket handle at the bottom. Even out the string on both sides of the racket by finding both ends of the string and pulling the entire length of string together.

Two Knot
For Two (2) knot stringing, do NOT cut the string. Feed the string through the bottom hole on the Left side of the racket handle and up to the left-of-center hole at the top. Over to the right-of-center hole at the top and down to the right side of racket handle on the bottom. Pull six and a half (6 1/2) time the length of the racket handle on the right side of the racket. This will become the Mains side while the rest of the remaining string, on the left of the racket handle will be used for the Crosses.

Exceptions
If a player needs two different tensions, one for Mains and a different tension for Crosses, then that situation can only be solved by four (4) knots. i.e. two sepatate strings!

Stringing a racket for dual tensions with one (1) string, two (2) knots, will NOT work as the tension on the single string will even out relatively quickly with playing.

Yonex Warranty
Yonex requires 4 Knot and 26lbs, or less, for warranty on all their rackets!