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MudMonster

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About MudMonster

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    TT Newbie

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    Germany
  1. MudMonster

    Wheelies...am I just a wuss, or?!

    Hi Guys, a "willy" ain't a question of the engine's punch but more a question of technique. You can wheel even in the 5th gear. To slip the clutch therefore isn't necessary. Stand on the footpegs; seesaw a little down, to compress the suspension and when it uncompresses by spring load pull the throttle open. At the moment you found the right timing doing this, the bike will wheel even with little throttle open. When you found the right timing you'll be surprised, how easy the bike comes up. Warning: never forget to keep one foot on the rear brake pedal. To do an emergency braking sometimes is the only way, to avoid landing on your back. Regards MM
  2. Hey Guys, thank you very much for the helpful hints and explanations ! @highmarker: you gave me a good idea, what it's all about. If I understood that right, the most disadvantage will occur with low rpm + low throttle as iginition sparks a little later than possible. @Krannie: as far as I can say TPS is defective Poor calibration wouldn't result in ... hmmm let's say "iginition failures" Can't explain it much better as the engine produces jolts, that only occur at certain throttle positions. My WR 250 F is from '07 (the first alloy frame model) To my knowledge changing of the mapping is not possible, so how could this become defective ? @William1: well I know these machines have TPS for some reason. But if it's mostly to meet homologation requirements (emission) it won't be very economic to pay a fortune to fix this and only be rewarded by slight change in engine power. I don't do races and motocross on that bike as I'm only play in the mud for hobby. It's more the "goat-like" stuff in rocky area; therefore most important thing to me is trial-like handling an good, smooth response on the throttle to keep traction even on slippery ground. If the engine-power is just degrading a little and I can't break anything by riding whithout TPS I'll simply give it a try as highmarker proposed When I experience the power that's left is too weak, there'll be still the option to spend that money. Best Regards MM
  3. Hey guys, I hope, there's someone outside who has some deeper knowledge about this topic. Main question is: are there any ill effects to the engine, if I remove the TPS (Throttle Position Sensor) from the carb ? My issue: the TPS on my WR250's Keihin is broken. I found out by simply disconnecting it. It was the last step on my research as I had problems in acceleration, that felt like ignition failiures. First I thought it was jetting but after madly testing out many many setups without a cure I came to conclusion the cause must've been somewhere else. As the engine ran like a charm, when unplugging the TPS I knew this thingie must've been the reason for all my hassles. First I thought of replacement but the price for this sh... is unbelievable. Regarding it's only a regulating resitance, a price of 200$ or even more is mighty evil. As I said, the engine of my WRF ran smooth and powerful with the TPS unplugged. So I came to the thought "why replace this instead of dumping it ?" Does anyone know a reason that justifies the horrible price of this part and makes it mandantory to replace ? Best Regards MM
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