jmeoni

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About jmeoni

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    TT Newbie

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  • Location
    Colorado
  1. Thanks for the info. I already tried numerous different main jets including the 175. I got help from Burned in the jetting forum who suggested a 160 main jet which is what I had before Vickery changed it to a 162. Right now I can't even start my bike, hot or cold, without letting more air in by using the hot start. Our altitude is about 6,500 ft or so. Glad to hear about the Lukes Racing, yeah I meant "Lukes", kit. So I take it you did not rejet after adding the kit? By the way, I have a huge bog right off idle. That's the leak jet? I thought it was the pilot jet. My fuel screw is all the way in right now w/ the messed up jetting from "professionals". If I turn it out even 1 turn, the engine starts to run rough. 06 YZ250F FMF Ti Powercore slip on Twin Air filter
  2. After researching all the threads on big bore kits and because I ride mostly MX, I'm going to go with a 262 kit. There is a big price difference in all the kits available. Anyone have a bad experience using the Lucas Racing kit, they seem to be the cheapest, but sometimes you get what you pay for. Will I have to change the jetting? If so, can someone suggest a starting point. I ride up in Colorado and still don't have my stock jetting where it needs to be. I brought my bike in to Vickery Yamaha (after giving up on my jetting skills) and they seem to have missed the spot on jetting also. As a matter of fact, I'll be going back to my original specs. I have a 162main (is that too rich?) a 48 pilot (which I know is too rich, I'll try a 40 next, stock 42 had too much bog) and I have a stock needle on #2. I have no clue on the leak jet, but Vickery put in a #70. Any suggestions or comments would be helpful.
  3. Burned, I have a stock engine 06 YZ250F which has been jetted for high altitude in Denver. I ride/race tracks in Colorado. No matter if the bike is hot or cold, whether I need to use the choke or not, the bike will not start unless the hot start is pulled. With a warm engine it usually starts right up, if I pull in the hot start. When the engine is cold, I need the choke and the hot start to start the engine, then I have to hold the hot start open until the engine warms or it will stall. Is this normal? Vickery Yamaha jetted the bike: 162 main, 48 pilot jet, 70 leak, clip on 2. Thanks.
  4. Quote: Originally Posted by Eddie Sisneros you are way rich on the main jet still.you need to be at a 160. the pilto jet needs to be a 48. Burned, I took your advice, installed the 160MJ and 48PJ and the bike ran very well from midrange on up. I am happy, thanks. The problem now is that there is a huge bog at low end, right when the throttle is turned. Once the throttle is turned, the bike almost stalls and ocassionally pops. I adjusted the fuel screw throughout its range and had to turn it all the way in to get even close to crisp throttle response. At idle, warm engine, the idle started to bog at not even 1 full turn out and got worse as I continued to screw out. As I screwed in, the idle started to pick up as the screw reached all the way in. Do I need to go back down on the PJ, perhaps back to the stock #42, or is there a different problem? Here is my original post Thanks again.http://www.thumpertalk.com/forum/showthread.php?t=364085
  5. Burned, I took your advice, installed the 160MJ and 48PJ and the bike ran very well from midrange on up. I am happy, thanks. The problem now is that there is a huge bog at low end, right when the throttle is turned. Once the throttle is turned, the bike almost stalls and ocassionally pops. I adjusted the fuel screw throughout its range and had to turn it all the way in to get even close to crisp throttle response. At idle, warm engine, the idle started to bog at not even 1 full turn out and got worse as I continued to screw out. As I screwed in, the idle started to pick up as the screw reached all the way in. Do I need to go back down on the PJ, perhaps back to the stock #42, or is there a different problem? Thanks again.
  6. No, but how about a sweet 04 YZ250F in Colorado?
  7. Thanks for the help, I'll check out the costs. It looks like it'll be expensive. Another guy on a different forum answered a similar question by saying to port and polish (I'm not sure what he meant) and that it was a reasonable cost for good power increase. Any comments on this? I just added the costs of the Wiseco and Hotcams. Just to buy the parts (and I'm not sure if the Wiseco piston includes gaskets, rings, etc.) would be about $550 to $600 dollars. Waaay too expensive, but thanks for the input.
  8. Yes, I noticed a little stronger mid range, but I didn't notice anything in the low end. I let a B class rider ride my bike and he compared it to his 05 YZ250F w/ a full WB exhaust system and he said my 06 had a snappier mid range than his.
  9. Thanks, I have experimented ad nauseum with the jetting and Burned, in the jetting forum, squared me away. The rear sprocket is a great idea, I'll try that.
  10. Nope, I'm not upset at all. It's good advice and I have thought about a riding school for braking and cornering... which is cheaper than $200. But I still feel that at 190-195lb, 6'3" tall, a little more low end/mid would help too. I've had YZ426 and ridden a YZ450 and the power was great, but the 250F is more fun, it just needs a tad more hit. Also, explain the "use the clutch". Like I said I'm a novice. (I think I know what you mean...do you mean pull it in/fan it to get the rpms back up?)
  11. I have read through the threads on more power and there are several suggestions, but they usually deal with top end power. I'm 190lbs without gear and racing novice class, so I spend more time in the mid range and low end coming out turns. (I'm sure as I practice, I'll get faster cornering speed, but for now I need help.) Any suggestions to get more power in the low and mid range in the $200 to $300 range. The bike is stock except for Uni air filter and FMF Ti Powercore pipe. Track altitude is 6000 ft, I have a 160MJ, stock needle 3rd clip, 42PJ... if that info helps. Thanks.
  12. How far did you raise the the forks? Need to know so I can do the same. Thanks.
  13. I'm in Colorado and ride on tracks near the 6000ft altitude. Summer temps are in the mid 80s to upper 90s. The bike came with a 172 MJ (dealership changed out the stock 178MJ), clip on#3 w/ stock needle, stock 42 PJ. I have a aftermarket air filter and a FMF TiPowercore pipe and the bike has no power, poor, choppy acceleration and pops and crackles on deceleration. The throttle seems to clear up at 3/4 to WOT, but the power still seems down. I have experimented with the clip position, but cannot seem to get crisp engine performance. I could use some expert advice. Which way do I need to go with the MJ? Thanks. I just read a thread where a rider in Colorado w/ a FMF Ti Powercore on a 05 WR450 is using 168MJ, stock PJ and clip #3 on a blue JD needle. Burned suggested that these are correct settings. Would these settings apply to a 06 YZ250F also (is the carb the same)?
  14. Thanks, what's a Block LJ?