Index to Roads by County and by Date of Ride

4 Responses to Index to Roads by County and by Date of Ride

1. ron says:

   March 7, 2014 at 11:19 pm

   Scott,
   Unless your real light person a 250 (4 stroke) is starting out without a lot of extra horsepower overhead.
   This makes your 250s power seem sub standard as you may not have enough extra power headroom even with high altitude jetting. That’s because its not just the wrong gas/air ratio, its less air giving you the wrong ratio. But more important less air is less air, tweaking the jetting wont get that lost HP back just some %.
   Even an xr350 is enough to make a huf difference with % HP overhead needed.

   If you are going to stick with the 250 get it jetted to run good at high rpm mid to full throttle, and can have it jetted more toward a compromise elevation 2500-3500 for the low rpm.

   When in high elevation and need more power take the rpm up a notch as a 250 needs to be worked more and the jetting will be right for high elevations, granite steps…
2. Mark Edwards says:

   August 11, 2011 at 3:54 am

   Generally you can go down 1 or 2 sizes on the main jet and leave the pilot circuit alone. If you have an easy way to pull the lid off of your air box above 8-10,000 ft that helps significantly too. Be sure any air still has to pass through the foam filter though. Even a short time riding with air going around the filter (or through a dry filter) will wear your engine significantly. The problem is the range of elevations in the area. Especially if you can’t open the intake, you’ll be making a compromise so aim for the elevation you’ll spend the most time at or have the most trouble with the lack of power.
3. dave says:

   May 9, 2011 at 6:16 pm

   Scott, you probably need to rejet the carb. The bike will run very rich at this altitude. I had mine rejetted after I purchased it. I’m not sure which size they used as the dealer did it shortly after I got it. They may have a suggestion for you: Davis Service Center, 970-249-8161
4. SCOTT says:

   May 9, 2011 at 6:53 am

   I HAVE A 2008 XT250 THAT RUNS GREAT IN OKLAHOMA ABOUT 1000′ BUT I RIDE EVERY SUMMER IN COLORADO MANY OF THE TRAILS YOU TALK ABOUT. MY BIKE RUNS TERRIBLE AT THESE ALTITUDES. WHAT MODIFICATIONS DO I NEED TO MAKE TO CORRECT THIS. I APPRECIATE YOUR HELP.

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