COMMANDO1 23 #1 Posted July 25, 2012 Here is the question, i will be increasing the size of the drive pulley on my 72? commando 8 to give her a little more speed. If i increase the pulley from 4" to 6" does that mean the belt size also increases by 2"? Also does anyone know the right belt length and part number? How large would u guys go to speed up? Share this post Link to post Share on other sites
1054josh 25 #2 Posted July 25, 2012 I not sure how much but your changing the circumference of the pulley where the belt rides from 12.56 inches to18.84 inches. Share this post Link to post Share on other sites
c161rat 185 #3 Posted July 25, 2012 Hey commando.....here is a thread that gives all kinds of info on this very topic......http://www.wheelhorseforum.com/index.php/topic/30775-speed-up-your-horse/page__fromsearch__1 Share this post Link to post Share on other sites
COMMANDO1 23 #4 Posted July 25, 2012 C161rat....i lookad at that post. i read that the trans pulley on the commando also had a 1" shaft w/larger pulley. Here is my thought swap trans pulley w engine pulley. should not have to change belt size,what do u think? Share this post Link to post Share on other sites
c161rat 185 #5 Posted July 25, 2012 I would try it if thats the case...Just keep in mind that you may have to modify your belt guard.....I was going to do this on my 161 however to date have not done it......I had the same thoughts on not needing to buy a belt. I however dont have the luxury of having two pulleys with the same shaft size so i would have to purchase new pulleys for both sides..... Share this post Link to post Share on other sites
COMMANDO1 23 #6 Posted July 25, 2012 OK THANKS....BY THE WAY NICE PROFILE PIC Share this post Link to post Share on other sites
c161rat 185 #7 Posted July 25, 2012 Thanks.....Thats my C161 rat wit a couple mods and a custom paint job.... Share this post Link to post Share on other sites
c161rat 185 #8 Posted July 25, 2012 Thanks.....Thats my C161 rat wit a couple mods and a custom paint job.... Here is a link to the build...... for your viewing pleasure...LOL Share this post Link to post Share on other sites
racinfool40 203 #9 Posted July 25, 2012 The Input shaft on the 4-speed tranny's is 3/4 diameter and your crank is 1" so swapping pulley wont work.. MIKE Share this post Link to post Share on other sites
