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About joekarter

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  1. joekarter

    YZ490 rear wheel swap

    Does anyone know if the rear wheel from the later models will bolt on an '84? Thanks Joe
  2. joekarter

    20 year old Bike question

    My take. A lot of this depends on what kind of riding you're doing and (on motocross anyway) the track itself. I race a 99 KX250 with a vintage group on tracks that resemble most tracks from about the 70's and early 80's. On those tracks, it's about as good as anything else I could ride and when I get beat it's nearly always that the other guy was riding better. That said, it is a bunch more work than a 450 but luckily we race fairly short motos. Trail riding or desert type events I actually think it's kind of an advantage due to the weight and the it being easier to flick from side to side. All this said, on a modern motocross track it's a big disadvantage mainly in suspension and the run-ups to big timing style jumps. A modern four stroke puts so much power to the ground that a technical section that requires a near perfect approach on a 250 can be done with not much more that a blip of throttle.
  3. joekarter

    04 kx 125 O.S front wave rotor

    I have one on my '05 and my recommendation is that there are better ways. One thing that most articles don't talk about, is the additional gyroscopic effect of the large disk and how that changes the bikes handling. On mine it's a plus when blasting down a sand wash, but isn't all that great on an MX track especially at turn-in on rutted corners. You can feel that the bike takes more effort to initiate the turn. Way better bang for the buck, is to put on a braided line, a Honda master cylinder (about $50 on ebay), and a set of Honda brake pads. Excellent brakes with this setup and you can do the whole setup for what you'd pay for the disk.
  4. joekarter

    1975 KX250 Rebuild

    Nice bike and a cool project. I raced one of those for two years back when they were new and they were great bikes. Before you spend a bunch on the forks, take a real good look and make sure the tubes are straight. Kawasaki didn't take things like the quality of materials very serious back then and those bikes tended to get the "raked out bent fork tube" chopper look if you were into big jumps. As to your wounded stator, take a look at this website: http://www.electronicamotos.com.ar/products/Stator-Kawasaki-KX.html There's a listing there of all the bikes the stator for your bike fits, and some of them are WAY more plentiful on ebay than a 75 anything no less a KX.
  5. joekarter


    I've made quite a few gaskets for old bikes over the years. You can buy just about any thinkness gasket paper you need from a quality auto part store like NAPA, and you can get just about any seal/bearing you need from a bearing supply house. If you end up not finding a kit, and you don't have one, get yourself a half-decent vernier caliper so you can take measurements of the old parts. It's a bit of a hassle this way but it ends up being kinda fun (sorta like a scavenger hunt )
  6. joekarter

    front tube valve breaks off on inside

    You'll find there's a difference between a TR4 tube and a TR6 tube. If you do a search you'll see that the TR6 has a much longer reinforcement where the stem comes our of the tube and on some rims this'll hold the stem back in the rim. I've also seen tubes that are really too small for the tire that act this way as well. If you go to the local bike shop and take a look at several different tubes you'll see quite a difference in the actual size. Often the cheaper tubes are considerably smaller than the more commonly known brands and it'll cause this "suck the valve stem into the tire" problem. I think if you start with a Japanese rim-lock (the euro ones that come on most trials bikes are really terrible) and a larger tube without the nuts and washers your problem will go away.
  7. joekarter

    NATC Trials in Kingman AZ

    Not riding this one but checking. If you haven't been there before, the area is just about the perfect trials spot and the weather should be great.
  8. joekarter

    1975 OSSA MAR - Restore

    No personal connection, just something I remembered seeing....it would look pretty cool though http://www.smproduct...&category_id=18
  9. joekarter

    2010 280 Pro or a 2011 Evo 290

    Take a look at the links section here: http://www.tandenews.com/ It has just about every trials club in the country
  10. joekarter

    2010 280 Pro or a 2011 Evo 290

    Agree with both of the above, and Stonezone is right, you WILL need stiffer springs for the Beta (love mine BTW). That said, let me give you a bit of a different suggestion. If you can put this off until you can go to a local trials, or at least find out where the locals practice, you might be happier with your decision. If you can make the time, watch the folks in the lower classes (the upper class riders will be able to make a shopping cart look good) and look at how the bike handles. There are differences in the way each of them turns and reacts to body input that are similar to the differences between say a Honda and Yamaha MX bike. Not to say that either is better, but they are different. My advice is to think about how YOU ride a bike and then lean toward the one that fits that the best. You'll also find that trials folks are about as nice as it gets and most of the time they'll let you give them a short ride if you strike up a conversation. As far as parts, reliability and what-not, from what I've seen they're both great. All that said, don't discount that you may want to ride events down the road......it's REALLY addicting Joe
  11. joekarter

    Technique for transition from downhill to uphill

    Thanks, this was what I was seeing the successful guys do, but I couldn't figure out how the heck they were getting the front end to rotate up. Between your post and Lazier's, I at least have enough of an idea on what I'm trying to do to not crash every time I try it. All kidding aside this stuff really helps Much appreciated
  12. joekarter

    Technique for transition from downhill to uphill

    Thanks Lazer, that helped a bunch. I "think" my biggest issue was starting all this too far down the hill. I ride intermediate and this particular piece of the section was right at the advanced level. Much appreciated. Joe
  13. I need a bit of help (well really a lot ) on an obstacle I can't seem to figure out. I hit a spot in one of our sections last weekend with a fairly steep downhill (say better than 45 degrees) that ended in a V ditch and then went up the other side at about the same angle. Normally, if there was a straight approach I would try to stop and balance with the front wheel in the cut and then rock back with power on to get the bike to rotate. The problem with this section, was that the approach to the cut was at an angle and my technique just resulted in the front wheel tucking. I watched some other folks pull the front up as they went down the slope and place it on the opposing bank (think a downhill controlled wheelie) but I'm about clueless on how to do it without just driving the front end into the ditch (and yes I did that too). Help and kind jokes will be much appreciated Joe
  14. joekarter

    natc schedule ?

    You are being nice to us old uncordinated clubman riders......right?
  15. joekarter

    natc schedule ?

    Pretty sure it's a bit outside of Cotopaxi. The Colorado club's website seems to be under construction until the end of the month, but I'm pretty sure when they get it back up it'll have a map to the area on the website.