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      Video: 2019 Yamaha YZ250F Features & Benefits 

mugsymydog

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About mugsymydog

  • Rank
    TT Newbie

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  • Location
    Washington
  • Interests
    Mechanic, Dogs
  1. I have a 2001 CR250R that I ride on trails. I want to change the rear wheel to an 18 inch. I could buy an Excell rim and spokes and lace it up, buy a Warp 9 wheel from Wright's or buy a CRF450X wheel. The questions are as follows: Are the Warp 9 wheels any good, ie, Do the brake rotor and sprocket run true or wear unevenly or does the brake pulse? Are the hubs porous and leek water or grease? Are the bearing bores true, bearing life as expected? Are there any spoke problems, do they stay tight? Are the rims round and do they take the expected abuse? Will a CRF450X wheel fit my 2001 CR250R as the hub and brake rotor part numbers are different? Any experience in these areas? thanks.
  2. The 2002 foot peg and bracket and mounting holes are different than on a 2001. The frame holes are closer together and the peg pin is closer to the frame.
  3. Be sure to round and posish all the inside corners. You have removed significant load carring material so the stress at the inside corner will be much higher than stock. Definetly do not weld it. Make it pretty with a half round file or rotery file in a drill and polish it with some 200 or 400 grit emery paper. Any ding to the new surface could start a crack so you might consider protecting the new surface with an 1/8" bead of RTV or make a plastic guard from an old mud bucket. Keep an eye on it for future cracking.
  4. That carb air boot thing is very interesting. I have a 2001 CR250R (looking at CRF250X) and getting the carb air boot on right is tricky. I found that greasing it helps, I also loosen the front carb clamp and rotate the carb while pressing the boot on. It has to be inspected from all angles to ensure it is on correctly.
  5. I'm also thinking about a new bike. I'm wondering how a 2006 YZ250F would work for a trail bike in the pacific north west. How would it compare with a CRF250X or a WR250F. I like light weight bikes as I'm 55 and 180 pounds.
  6. I am concerned about the grunt capability of the CRF250X and I not convinced the twin chanber fork buys you much off the MX track except maybe in the woops. I might even be a detriment in rocks and roots. I currently ride a CR250R in the woods and slip the clutch a lot which is tiring. Do the 250Fs or 400Fs require much clutch work in tight stuff or can you just gas and go. Is the KTM 250 a better grunter than the CRF250X? The 6th gear doesn't get me excited because the transfer stretches here are short and can be tricky at high speed.
  7. How does the CRF250X stack in with this pile of trail bikes? I'm riding in western Washington. A compination of Walker, Reader, Tahoya and some Naches and Mad River. I weigh 180 pounds and like to trail ride and I ride supper senior class in enduros. All the options are very confusing.
  8. I know 15 is very small but even a 17.5 makes it idle rich. I am suspicious that mikunie carbs are not built that accurately and as a result each one takes a lot of brass to get it running right. I understand the 2002s are better carbed.
  9. I have a 2001 CR250R. I run a 15 pilot jet, S-7 needle jet, 6BEH2-76 needle in the second clip for altitude and a 380 to 400 main, depending on temperature. For low altitude in the winter I run a 17.5 pilot jet, set the needle to the third position and run a 410 main. But even more important for trail riding is to use a better spark plug. I use an Autolite 404. Their cheep but fire through a rich mixture much better than the BR8. They have a heat rating simular to a BR6 but I have yet to errode or short one but you need to keep an eye on it incase your riding style is to hot for the plug.
  10. I understand that lead is bad for your health, but not as bad as the benzene type additives that are in pump gas that require a catalectic converter to burn. Lead is also a high temperature lubricant that prevented excessive valve wear in older engines before it was removed from pump gas. I wonder if it could reduce the valve wearing that is prevalent with titanium valves. In airplanes and in years back when it was in pump gas it did cause lead fowling of the spark plug and I've hear of it plugging the holes in a car muffler. Typically airplane engines are run at such a high temperature that the lead does not condense into particles before it leaves the exhaust system.