saccityfire

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About saccityfire

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  • Location
    California
  • Interests
    Motocross, wakeboarding
  1. Hey, That's where that sign went! I couldn't figure out where the restroom was last time I went to Mammoth...
  2. If you're laying the bike over and powering through the turns the 51 may tear off the outer tread row. I tore ALL of the right side knobs off of my 31 after 4 rides in soft to moderate type terrain by laying it way over with no support berm for the tire. The nice thing was that the traction was stellar and no berm was needed for it to stick like glue. The bad thing was the short life of the very outer tread row. My 51 has held up better but I'm willing to bet you are laying it over pretty far. Regardless, 51 is still my favorite tire.
  3. I second the suspension rebuild request for nice photo tutorial. Great job on the motor!
  4. The main improvement IMO came with the SSS (speed sensitive suspension) Kayaba forks used on the 06 and newer YZ's. Previous to 06, they used a position sensitive fork. I've owed an 02 250F, 05 250 (smoker), an 06 450f and currently own an 09 450f. The best bike stock IMO was the 06 450. The difference in the front forks was amazing and made the Race Tech 250f and RG3 05 250 (both built for me) seem like real pieces of junk. The new shocks are so much better that I haven't put a dime into suspension work on either the 06 or 09. Before you jump on me for selling the 06 for the 09, I blew my back out in November 06 and sold it to keep from losing resale value. In June 09, I couldn't take not having a bike any longer ad got the 09. The 09 is lighter and a lot of it (the weight) came out of the unsprung areas which no doubt helps the forks and shock do their job more efficiently but honestly, it is not a huge difference and took a $500 pipe to wake up the motor. I'm looking for a good used 06 450 for a friend right now. Again just a hack's opinion.
  5. I tore mine down completely looking for a bad crank bearing after just 2 hours and wouldn't you know it turned out to be that dastardly skidplate. After putting the thing back together, I cursed this darned thread.
  6. You sound like a Yamaha sales person.
  7. It's like a disease. I just can't help myself! I think this winter weather is getting to me. I need to go riding.
  8. My point was not kind of correct. It was entirely correct. The comment was in regards to the use of the term "wind chill factor" which is the "perceived" temperature as being some point below ambient by the nervous system of a human. If a piece of metal, or radiator or whatever is left anywhere, it will reach ambient temperature. If the ambient temp is 20 degrees, the thing will reach 20 degrees and not a tiny bit lower even though the wind may be blowing 100 miles per hour and the wind chill factor may be -50 degrees. I agree that if the wind is blowing through the radiators of a running, stationary bike, the bike will cool faster as this is removing the air heated above ambient via radiation from the fins by conduction to the constantly replaced ambient temperature air of the wind. However Gray, you stated without qualification "Machinery won't get any colder in the wind, but it will get cold faster." This statement is correct if the bike is sitting still or moving into the wind. However, If you are traveling with the wind, the bike will actually run hotter than if no wind were present. This of course is due to the stagnant air pocket that you're traveling in causing a reduction in airflow over the radiator fins. In fact if you travel the same speed and direction as the wind there will be almost no airflow over the fins and your cooling would become nearly 100% radiant. The only conduction would be from the heated air rising and pulling an ambient temp airstream up from below. You might just overheat on this windy day!
  9. There is no wind chill factor on anything except flesh. Wind chill factor is the "perceived" temperature below ambient by our nervous system. Therefore, if it's 20 degrees outside, it's 20 degrees no matter how fast the wind is blowing or you are riding. The amount of cooling taking place between the hot parts and the air is affected however by how fast the air that becomes heated near the hot part is replaced by air that is at the ambient temperature. The faster you are going the faster the ambient temp air moves through the radiators and over the surfaces of the engine. Sorry, couldn't help it after seeing the "wind chill" comment.
  10. What was the problem leading you to call Enzo in the first place?
  11. The main thing you will learn from riding a 125 2 stroke is that they suck compared to the 250 2 stroke, the 250 4 or the 450 4. They are harder than he11 to ride. Get a 250 4 and find happiness. Graduate to the 450 when you find you need more power than the 250 4 can deliver (which shouldn't be anytime too soon). When you're ready for a 450 (in 1 to 2 years), it will be newer, better and/or cheaper than what you can get right now.
  12. I have the HPSD damper mounted to my 09 YZ450F right now and wrote about it quite a while ago. Yes, I misspelled "damper" in the original post. http://www.thumpertalk.com/forum/showthread.php?t=846426 It works great. You all are right, it doesn't stop headshake right at center but it does stop it just off center where headshake takes the bars naturally anyway. In other words, it does absolutely stop headshake. It really helps in holding lines in the corner as well as add confidence as the bike is starting to slip laterally. One word of warning though, set it at one click in and adjust up from there if needed. I set it to three clicks when I first mounted it as the dampening felt so minimal, and could hardly ride the bike due to major loss of steering responsiveness. I currently run it at just one click in and it's great. Good luck. Hope this helped.
  13. lotta great advice and good points. I'll ride it and pass your advice on to my friend. Thanks.
  14. A stone is 14 lbs. per Wikipedia. That means that Fraser is between 147 and 154 lbs. I would say that he needs softer springs as the stock bike is targeted at a 175 lb rider. Fraser is 21 to 28 lbs lighter than the "target" weight. Of course if you're riding supercross, it may be just about right. On a separate note however it takes large stones for a smaller guy to ride such a big bike and my hats are off to ya Fraser.
  15. I've been saying this ever since the first reviews came out here. I agree also that fuel mapping may help ( I have no idea about this since I have never done it). I do think that a throttle tube with a modified (softer) pull is a good answer. Josh Grant uses these adjustable pull tubes to lessen his throttle response in slippery conditions and make it more responsive in dry/sticky conditions. It won't ever matter how much you loosen the throttle cable except that you will twist your hand further to find the "hit". Prior to the hit, however, you will still be flat as you will have applied no throttle.