exhaust pipe

two questions i have a 91 with the 650 and a 95 with the 701. they both need the hose that goes from the stock exhaust to water box, are they the same? and where would be the best place to get one cant seem to find one.
 
650 and 701 Exhaust Hose are different diameters. Take some measurements.

Can "stove-pipe" one together with one 90 Silicone Elbow. two 45 Elbows, two DIY Aluminum Tubing Couplers cut to length plus six Hose Clamps...

Or might can buy a cheap used Yamaha Exhaust Hose or two with the right bends which you could then trim, cut and stovepipe to make the Stinger to Waterbox connection.
 
Yamaha still Sella the stock hose bit it's quite expensive. I just made a hose for my ski. I have a tnt center bleed chamber instead of the stock pipe, however the tnt chamber is designed to use the stock exhaust hose. I used a 2.5in id silicone 45 degree elbow, 2.5in od aluminum 45 degree elbow and a 2in id to 2.5in id 90 degree reducing elbow and made that work. For the stock exhaust use just a 2.5in 90 degree elbow instead of a reducing elbow. It was about 75-80 bucks total
 

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