Jump to content


  • Content Count

  • Joined

  • Last visited


About billyt

  • Rank
    Advanced Member

Previous Fields

  • Bike
    2017 Yeti

Profile Information

  • Location
  • Gender

Recent Profile Visitors

12,335 profile views
  1. 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 ?
  2. 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
  3. 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
  4. 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.
  5. 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.
  6. Part # 434-22124-01-00 Changed it for you and old eyes like mine ...
  7. Why are the part numbers in yellow? It is almost impossible to read them... ☹️
  8. "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 ?
  9. First step: New Spark plug If not jetting then it could be the coil or CDI box.
  10. billyt

    Taming a 300 factory?

    Glad you like the S3 Red Head Insert mod Carlos.
  11. I agree Dabster. In the past years Beta have released the Factory bike info long before this time. At least we knew what the bike configuration will be, however the bike won't land until February or March here in the USA.
  12. Strange that there is not one peep about the 2020 Beta Factory models yet...☹️ Anybody heard anything about them yet ?
  13. Hey all..... I had some 1st gear jump outs into neutral with my 2019 Factory Beta 250. Before I went into the guts of the gear box work to solve the problem I did a simple experiment out side the gear box. I changed the gear shifter to the shorter one offered by Beta. Presto no 1st gear jump outs anymore. Did this solve the initial cause or just camouflage it? Either way it is telling me something... The long stock gear shifter affords a longer lever bouncing effect exposed to more things touching hitting it??? Not saying that is the issue, however that little bit of extra length does have to move up and down as it re-acts to jumping off and up rocks etc and if the gear box drum and pawl is dodgy to begin with the longer fulcrem lever won't help the issue. I would say that 90% of the Beta riders I see out there have their stock gear shifter set way to low. The gear shifter should be equal to or covering the proud standoff Beta name on the cover. A shorter shifter makes for easier up shifting and more positive gear engagement, the shorter shifter takes more effort to travel in given direction with less movement a longer gear shifter is easier movement but with more travel and more potential over shooting a selected gear. BillyT ? The Shorter Beta gear shifter.
  14. Are you the man to speak to regarding 4t carb setting 

  15. Is there AC current/voltage coming out of G1 going in to B1 at the DC Rectifier / regulator coil? The voltage coming out of the DC rectifier is 12 VDC so the AC voltage going in should be higher... Although this does not speak to the AC voltage side that feeds the spark plug it is health check of the AC mag in general.
  • Create New...