taco eater :
Jack Rutherford from Columbus, OH United States
Add a 1mm or thicker washer next to the drive boss and this Bx27 belt actually works well with the stock cylinder. I was running the MLM people's pipe as well. If you are completely stock maybe go with 2mm of washers or so otherwise it will make a dog out of your SR. Woof woof! I didn't run the Bx26 long enough to shred it but acceleration from a stop was dreadful; however, top speed was equal to or near the Bx27. Stock belt was 14mm wide and Bx27 is 15.8, you do the math.
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CORRECT BELT IS THIS ONE, NOT THE BX26!!!
April 6, 2019
taco eater :
Keegan Wilhelm from Kansas City, Mo
I have an SR with the malossi h2o kit, mlm pipe, tm24 and a few minor tweaks to the variators. I tried the bx26 first like the other review said. I gained a solid 7mph with it, pushing me to 47mph @ 11k rpm, but it only lasted ~10 miles before it shredded itself, and made my variators and case cover the temperature of the sun.
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this wont fit either a urban or a SR
April 30, 2013
taco eater :
Goose from Detroit
the correct belt for the urban is a gates BX31 and a correct belt for a SR is a gates BX26 (found through experimentation of a 26, 27 and 28)
This plus at least a 1mm washer on stock cylinder 
CORRECT BELT IS THIS ONE, NOT THE BX26!!! 
this wont fit either a urban or a SR