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Found 6 results

  1. Hey guys i recently acquired a 2012 Yahama yz250f and i will need to be re-jetting the carburetor. I'm not really sure where to start on what size jets i will need. I ride between 7,000 and 10,000 feet in elevation.
  2. I recently purchased a 2012 XR650L that is all stock. I am confused as heck after reviewing numerous topics in this forum. I am in the Denver area at 5300 ft. in altitude and will be doing most of my riding between 5000-7000 ft in elevation. The bike is from the east coast and I am almost positive nothing has been modified on the carburetor or airbox. My riding will consist of 50% road, 50% intermediate trails. Not crazy trails (50 year old riding). My bike is experiencing slow throttle response, long start ups, spattering on decelleration. I want to do the minimum economical modifications as possible to the bike. I am confused on the following topics after reading all the topics: different jargon (desmogged, desnorkeled, dewhatever) Type of carburetor I have Main jet and pilot jet numbers for my altitude, and specific to my carburetor The minimum I have to do to the bike if I want to keep the factory exhaust (I like a bike quiet and not loud) and to get it to run better My initial plan was to replace jets with the correct ones for my altitude, replace air filter with Uni filter, remove airbox snorkel, and adjust fuel/air mixture. Don't know if I need to mess with the smog equipment. Any help from the higher altitude folks would be appreciated.
  3. Finally got my wife's CRF 250X jetting dialed in for high altitude trail riding and thought I would post what I ended up with: We live on the Colorado front range and usually ride trails between 7,000 to 12,000 ft. We tried to stay with stock Honda parts and not many mods. Main: 125 Pilot: 42 Stock NCVT needle: 4th clip down (But may also recomend the NCVQ needle from a 2004 Yamaha 450) Leak jet to accelerator pump: 50 Pilot Screw (TM design works): 2 1/4 turn out O ring mod on accelerator pump Snorkle only removed on air cleaner box
  4. Hey guys - sorting out my XR400R before hitting Pikes Peak, Telluride, etc. I did double check the jets and needle clip setting but also wanted to double check about octane. I am from NH and always used 91 octane gas in my toys. I also know that sometimes too high of octane can hurt some like older small engines. Just verifying that it’s ok to run 91 in my XR400R at those higher elevations??? Seemed fine at 9-10k feet. Thanks in advance !!!
  5. Hello. I recently purchased a 2007 Yamaha WR250f. I live at 5800 ft altitude and often ride up to 10-12,000 ft. I was wondering if anyone had any jetting recommendations for this altitude. Thank you in advance
  6. Hey all, I am off on a cross country camping trip and will be taking hauling along my DRZ to do some trail riding all over. I live in the south, but will be traveling to Black Hills, SD as well as Montana and then down to Utah as well as Colorado. My question is, I am jetted for the south, Ga, TN area. Bike runs like a champ at my altitude but I'm sure moving up to higher altitude will make the bike run rich. Would it be worth it to re-jet for a higher altitude? I'll be moving around a lot, so would it be worth it? I don't want to be messing around with it on the road, so I would rather set it once and ride it. Let me know what you fine people have done. Thanks in advance. Kyle
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