Me Myself and I Posted February 12, 2017 Share Posted February 12, 2017 I have a 2007 TTR 125 with a 150cc big bore kit. It currently has a stock 13T on it and I want to change it. I'm thinking about putting a 10T on it, and I've found many that fit but most of them say they're for pit bikes. Is it a bad idea to put a counter sprocket this small on my bike? Link to comment Share on other sites More sharing options...
blackhat250 Posted February 12, 2017 Share Posted February 12, 2017 Yeh, ,go up 1 tooth, since you've upped the bhp.. [ unless your trial riding]/ Link to comment Share on other sites More sharing options...
cotterpot Posted February 13, 2017 Share Posted February 13, 2017 You need one of these https://www.youtube.com/watch?v=rLDgQg6bq7o ;-) Link to comment Share on other sites More sharing options...
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