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  1. 81 KDX80 stator and ignition specs

    Hi, I picked up an 81 KDX80 for my son. It has points, condensor, one stator coil and one wire from the stator to the ignition coil. Does anyone have the specs: stator resistance ignition coil primary, secondary resistances points gap Spark timing - presume outside flywheel mark...
  2. Sound check!

    Hi Chris, I've had a project like this on my to-do list for a CR125 for a long time and never had a good start point to shorten the possible iterations to make it work right, so I never really tried. However, with your success, I'm very interested to see diagrams, drawings, amd/or pictures...
  3. Do you Have Medical Opinion to Support use of Braces ?

    Doc P, Shoot into Pubmed and do a search. I found this for starters: http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=pubmed&dopt=Abstract&list_uids=15788733 I haven't checked if the full text is accessable to me, but being a doc perhaps its accessable to you. Here's...
  4. Dear Tim Olson,

    Can the (back)issues of this Mototech magazine still be obtained in some form?
  5. Advice on Octane Boost for 2002 Yamaha WR250F

    Ok, I'll leave my foot firmly planted in my mouth, stoichiometric is the chemical mix ratio (mass flow ratios caused by Bernoulli equations at a carb venturi may or may not result in stoichiometric ratios), and I have now had my dose of education for today by reading page 2. I'll leave proper...
  6. Advice on Octane Boost for 2002 Yamaha WR250F

    Sorry guys, I replied to a post on page 1, not noticing page two existed, so my comments are out of sync with page 2.
  7. Advice on Octane Boost for 2002 Yamaha WR250F

    I'll step into the fire. If your hp produced per mass-based (stoichiometric?) carb generated mixture is down because the effective mixture chemically speaking between fuel and oxygen is different, due to the different gas, and your usage situation needs the same hp - you suck more mass through...
  8. 450F Clutch noises

    This is probably one of bleeding-edge design situations, where the jump from 400 to 426 triggered it, they got it worked out but then when it went from 426 to 450 it was a just slightly different load and control situation again for the clutch. Before I'd get too upset I'd drop the 01 or 02...
  9. 450F Clutch noises

    Hi Bswift, I noted your comments about the actuating lever arm lengths. I swapped the 3 01 plates into my 00 and ignored the lever arm issue. I now have a possibly mushy engagement and maybe a hint of drag when released, but I don't pull the lever to the bar because I use a few fingers on...
  10. tough guy to tough guy: "you say something to me?"

    Here's a link connecting the issue of loud exhaust pipes to the medical loss of your hearing: http://www.retain-it.com/earplugs.htm It has a table of dB levels vs allowed exposure times per day. Your 96 dB bike will easily make 110 dB on the gas and you're allowed 30 minutes at 110 dB...
  11. DRZ-E and WR426 Sound testing completed.

    Go to thumpertalk, in the YZ250F forum there's all you need to know to get straightened out about sound testing correctly. Doing it right will probably fix your results vs what you expected.
  12. 2003 Crf450 Soft Rims?

    I had an old mid-80's CR125 with a bend in the front rim, where the edge was tweaked outward from a single hit on a point object (bought it that way). I took the wheel off and beat the snot out of it with the largest objects I could find, backed by concrete, and it didn't budge a mm!!! I was...
  13. Strangest thing...

    One 426 kick-back in the foot is a vivid reminder to kick it all the way through like you mean it. It can be enough to tweak your ankle. If you do the drill they start excellently. The time required for the drill is not good for racing, but fine for trail riding. I'll bet the guys kicking...
  14. Stupid CR450F Countershaft Question

    If you want to be sure you don't get any chain contact on the cases, note that the chain can slide side-to-side a little bit on the sprocket, so slide the chain inboard by hand to confirm it can't hit the cases at all. You can slide it outboard and push it in side-arc mode to check for...
  15. Strangest thing...

    A good Canadian ride consists of multiple flavours of tree bark juice on the ends of your bars and shoulders, sandy whoops sometimes underneath overhanging branches, tight loamy twisties and perhaps a dose of rocky trail (the whole trail is a rock at times 20 yards long) with hidden bottom water...
  16. suzuki rm450 4stroke

    ASCIIbation! :) :thumb: :yeehaw: classic, from a fertile mind :thumb: well, enough poor taste humour for now. Can't razz the KLuDRuXuZ (DRuKLuZuX?) guys excessively. Ok, I promise to say something constructive next time. But, still, :yeehaw: !! A truly funny term for modern times.
  17. Hand signals while riding when your the leader

    I've seen and heard lots of lost rider stories. The usual cause is guys getting into a give-er race/chase mode, wherein not letting the guy ahead get even a bike length away from you completely obliterates any recollection that someone is behind you - until you stop and wonder what happened to...
  18. Whats a "hot start swith" and will it help my KLX?

    The simple version of a home brew hot start is to drill a hole into the intake tract between the carb and cylinder and plumb in a hose up to a valve somewhere, and have a foam filter aka like a normal air filter but smaller inline. Open the valve = let more air in to lean out the mixture for...
  19. Thunder Alley CRF450 slip-on exhaust mini-review

    If you want to get fancy with your sound testing, set up the SAE1287 rigging and tap the sound meter output into your data acquisition system so you can get not only dBA vs rpm, but the throttle opening as well for a bit more eye opening data. It would be neat to see the SAE spec rev dB as...
  20. Rich Rohrich

    I have a vague recollection of the bike with no tank jumping. Wonder if I still have the mag somewhere. On the topic of rotational inertia and crank size, I'd bet no one except a few computer jockey eng's in the big R&D depts have ever got any solid numbers to discuss. For those with a need...
  21. Dual Sporting in Canada-are laws similar to U.S.?

    I fizzed out before I dug up an adequate map, but Dual Sport Guy's stuff shows you to be going to a place that is a long highway day from Saulte Ste Marie, followed by another whole day's highway travel to southern Ontario. The countryside is mostly the same from about 100 miles north of...
  22. Dual Sporting in Canada-are laws similar to U.S.?

    Insurance can be a big deal, in Ontario, but I don't know specifically in other provinces. When doing highway time people bend the limits like everywhere else I've travelled in North America. Get them to fax you a temporary insurance slip. Is your destination stealth, or just not Ontario?
  23. Dual Sporting in Canada-are laws similar to U.S.?

    Nobody's going to check your smog setup and if you've still got the L accoutrements you'll look nice and legal too. Just have your headlight and tail light illuminated, plate visible where it ought to be, working brake lights and a nice big visible rear view mirror. If you didn't loudify the...
  24. Divide the Thumper Forum?

    No, don't split it up. Besides, then what would you do about the KLUDRUXUD 400's (KLDRXZ kawi suzuki merge)? My favourite dig these days ;-)
  25. WR 5th gear in my YZ 426?

    When you get the real parts, installed, done and bugs out maybe you could post the part#s and any gotcha's you encountered in the procedure? It would be appreciated for reference sake if/when I do it.