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billyt

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About billyt

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    What Ever Starts

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    Scotland/USA
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  1. A thumb throttle on a EM motion is an accident waiting to happen. We should be encouraging experimentation as it takes the sport of trials forward. We should also respect those people and ideas that came prior and learn from of it Everything comes around full circle as there is nothing really new and earth shattering to-date. Like in the past the "thumb throttle" conversation will have its moment, debate experimentation will ensue and then slip into the long list of "what ifs". Its all good stuff and keeps experimentation alive.
  2. This question has been brought up and tried several times though the years. A standard Throttle tube twists towards the rider, and the front brake activates in the same direction A Thumb throttle pushes AWAY from the bars and the front brake pulls towards the bars. The latter is VERY hard to do and control with any fitness on a trials bike especially at the higher levels Keeping the front brake covered with one or two fingers at all time whilst keeping your thumb on a thumb throttle leaves very little of your hand actually holding the bars It is also tricky to do full lock turns with a thumb throttle as your thumb is extended out. Hence why it has not been adopted Go try it out for your self. I guess it is the "Thumb Throttle" idea time for recycling again. I applaud the tthought process though. 😎
  3. billyt

    Service manual?

    Hi Primodious I am looking to get a 2021 R3 Vertigo A service manual and a parts list would be VERY much appreciated... How can I get a copy from you? Thanks
  4. billyt

    Tech forks

    The stock Beta Factory forks are not Tech forks. The Beta forks are Paioli. Check the Beta parts manual for details
  5. What brand and weight of oil are you running in the 4T ?
  6. Dan... Wont be the first time someone has installed the brass tang upside down. Seen that and worse on the VM 26mm Mikuni's on the Beta. How about a float install without an axle pin, or some holes drilled in the floats to make them lighter and the worse was connecting the gas directly to one of the brass atmospheric vent tubes and then could not figure why the gas was flooding out of the carb when he turned the gas on ?
  7. Mmmm... As soon as you get off the idle the main jet is now in the equation.... Key word is IN the equation Why? Because the fuel has to flow up through the main jet orifice to get to the needle jet orifice as the slide moves up taking the needle with it... As the needle and slide get higher the main jet starts to have a bigger influence / role to play All jets (Pilot / Needle / Main) are in the equation once the slide and needle jet start to move up although at different contributions Be it a Mikuni or Keihin carb the logic is the same
  8. I would propose that a clutch slips at higher RPM due to horsepower not torque. Torque will flatten out at a certain RPM and horsepower will increase at higher RPM's. Think of it this way: The torque of the engine vie crank length bore etc is the internal torque made by the engine design. The back wheel is also a form of resistive torque due to its diameter / radius and made by the wheels contact with the ground turning it. The engine driven back wheel torque at the rear sprocket is met with torque from the wheels outside diameter as it contacts the ground and both forms of torque meeting at the clutch pack. It is the horse power (rate of work) vie engine RPM that changes that relationship. If you disconnect the chain of the bike and roll the bike forward the back wheels radius will create torque around the rear axle, that is outside back wheel torque made purely by pushing the bike forward vie friction of rubber on dirt. The rate of the torque being generated around the rear axle is the horsepower. The faster the bike is pushed forward as in being driven by an engine creates two opposing torque values with the fighting for supremacy happening at the clutch pack. Torque may be the symptom but it is the horsepower (speed) that is the instigator of the problem When you turn the throttle you are creating horsepower (rate of work / speed) potential and to a defined point (not infinite) more CYCLES of torque
  9. I agree with Lineaway on that NOT being an original Beta part. There is no need for threads running all the way up the push rod. In fact having threads at the top will damage the seals.
  10. billyt

    Stuck Float?

    Have someone pull and hold the front brake. Lift the back wheel up about two feet and then drop it. This normally frees up a slightly stuck float. If not then you may have to take the carb off and check.
  11. Part # 434-22124-01-00 Changed it for you and old eyes like mine ...
  12. Why are the part numbers in yellow? It is almost impossible to read them... ☹️
  13. "A trials bike as an investment". ? I had to go check the date it was posted, I thought April 1st had came early this year ?
  14. First step: New Spark plug If not jetting then it could be the coil or CDI box.
  15. billyt

    Taming a 300 factory?

    Glad you like the S3 Red Head Insert mod Carlos.
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