srankin Posted July 8, 2020 What do you think....does an FMF Q4 richen up a 2015 YZ250FX compared to the stock silencer? Thinking about how to create a map that will be good for tight east coast woods with the Q4. Thx...... Share this post Link to post Share on other sites
bk29 Posted July 8, 2020 I think the dirt bike test map is a good place to start for what you are looking for. 1 Share this post Link to post Share on other sites
lucgallant My Ride Posted July 8, 2020 Yes, I ran that one for a few years with good results with the Q4. Share this post Link to post Share on other sites
