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  1. teazer

    Patrick, I'm away from my computer for a few days. While I'm off , try to get me the transfer...

    Patrick, I'm away from my computer for a few days. While I'm off , try to get me the transfer dimensions and angles and intake reed and port dimensions. Richard
  2. teazer

    2x stroke street tracker - project coming together slowly.

    You're making progress which is good in teh flooded UK. Those parts look like they would fit many different starter clutches.
  3. teazer

    Texas Two Step Taco

    Exhaust temp is way too high unless that's degrees F not C. How far from TDC is the roof of the exhaust port? Now measure the transfer outlets and inlets and the intake plus Bore: Stroke: Conrod length: Piston pin offset if known:
  4. teazer

    Texas Two Step Taco

    sounds about right and with a well designed squish band and torroidal head design the ignition advance should be closer to your original plan, but test it on the dyno to be sure.
  5. teazer

    Texas Two Step Taco

    For MEP or BMEP you are probably at around 6 at the moment and fully developed should be closer to 12. Aim for say 10 and see where that takes you. See what time-area you need in each port and work out the restrictions and what can be done with them. If 10 is easy, see what changes are...
  6. teazer

    Texas Two Step Taco

    Your wife is correct that increasing pressure increases temperature and vice versa. See Boyle's and Charles' law for more details. That is part of the beauty of MOTA simulation - and probably EngMod2T as well. It calculates both over a full cycle at given RPM. That way you can see the...
  7. teazer

    Texas Two Step Taco

    Arc or chord width doesn't matter as long as you know which you have. Software converts that to the appropriate dimension. Some use Chord and others use Arc. We have the technology. Most software uses Blair formulae or versions of it and few of them seem to create an exhaust that works for...
  8. teazer

    Texas Two Step Taco

    JT is the real deal. The rest of us are just kids playing in the sandbox. Doesn't mean we aren't having fun though.
  9. teazer

    Running comstar without speedo or retainer ring?

    The 1mm stops that side bearing from moving inwards. What's on the other side of the hub? 1mm should be enough as long as you don't forget the spacer between the bearings that's inside the hub.
  10. teazer

    Running comstar without speedo or retainer ring?

    Correct. The fork legs and spacers hold the wheel in place. In theory, neither bearing would need to be retained at the outer race as long as tboth sides butt up against a raised portion in the hub. If the outer races were able to move laterally, that would be a problem. Maybe there's more...
  11. teazer

    Running comstar without speedo or retainer ring?

    In simple terms, as long as the spacers are in place, the wheel is unable to move sideways. Holding one outer bearing in place with a snap ring should be sufficient. They are not needed on both sides IMHO.
  12. teazer

    Gear change arm to fit CB750 SOHC

    Not sure but I'd go for it. Suzuki are typically a coarser spline and most old Hondas and Yamahas are the same fine spline. I used the splined part of a CB160 shaft to repair a TZ350 shift shaft and have mixed and matched a few odd combos in the past. You could also cut and grind a stock...
  13. teazer

    Texas Two Step Taco

    203 is 3 more than a TZ and 185 is quite modest but that's what keeps the revs constrained. I suspect that the exhaust pulses are way out of time with that pipe. But was the pipe just a loaner from BB or is that the one you intend to run on the bike?
  14. teazer

    Texas Two Step Taco

    Nice video but peak power at 6500 may have been because that's where the pipe resonated or what the exhaust timing or area or other ports restricted it to. Ask BB what exhaust duration that pipe was designed to work with and from there you can work out whether the pipe or exhaust duration is...
  15. teazer

    Texas Two Step Taco

    BTW, Radical Ducati out of Madrid made some amazing cafe racers out of that SS Ducati base without a lot of heavy duty modification. Even the tank can stay.On the ST and Monster they have to use 999 tanks and that requires more cutting and welding to make them work. And that motor is prettier...
  16. teazer

    Texas Two Step Taco

    That's a pretty flat timing curve...... I'd start at 19 degrees and add more at lower revs where it's off the pipe up to almost 30 degrees and past peak drop it back fairly fast - just as a place to start testing. Too little advance is always safer than too much - within reason. Ralph's work...
  17. teazer

    FRANKENHONDA II the 1982 DOHC CB 750F2 Build

    just out of idle curiosity, why are the bores in that head gasket so much larger than the actual bores? Is it for a 900 or 100 by any chance? When a gasket is that much larger than the bore, the motor will have a tendency to blow gaskets or to detonate. Suzuki had that problem on the GT750 for...
  18. teazer

    Texas Two Step Taco

    I see that Rick M is still selling those one way clutch sockets. The drive nut in that example happens to be the same thread as the extractor/puller, so that it threads into the ignition rotor. I had qa starter nut on an ex kart TZ motor that fitted over the crank nut and sat in teh rotor...
  19. teazer

    Kawasaki ER-5 Cafe Racer

    I know it's still on a lift, but have you measured swingarm droop and steering head angle by any chance and will the chain line clear the frame as well as the swingarm? The reason I ask is that it looks a few degrees steeper than I'd expect, but that may just be an optical illusion
  20. teazer

    What did you build this week?

    Wow. There used to be an aluminum gear on the market a few years ago but I have no idea who manufactured them. Is that a full involute gear tooth I see there?
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