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51760 Views 207 Replies 46 Participants Last post by  JTACKM
I love the new wider ratio trans, much better than the old 250 in both spread and shift action precision. However, the gearing on the 300 is very low in first, and I was using second gear most of the time from a dead stop. Even with a passenger it was better than first which was more noise than action IMO.

On went a 2008-12 15t counter shaft sprocket, fit perfectly and suddenly I have a useable first gear! Nice mod, and I'm a guy who runs super short gears on everything I own. My Mustang has 4.56s and my KTM 950 SMR had a -2 front CS so I like my peppy gearing.

Another +, I think the speedo will be closer to actual speed now, stock it runs higher than actual speed. I'll verify that with a GPS ASAP but so far I'm convinced it is actually dong the speed it is reading.
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+1 tooth on front is closer to -4 on back. Im glad that the 250 sprocket fits the front. I found an aluminum rear for the 250 and wanted to swap out the 300's steel rear with about 3-4 less teeth but the front will be cheaper and easier to swap. Since the 300 allready has 3 less teeth stock on back than the 250 it may be hard to find a rear that is 4 more teeth smaller still
correction, on this bike it would be 3:1. On my dirtbikes that run around 12-13 front and 50-52 rear it is 4:1
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