Recent content by thenarrowboatman

  1. thenarrowboatman

    Calling the Electrical Gurus

    Jan-P. Thanks again for your thoughts.Tnbm
  2. thenarrowboatman

    Calling the Electrical Gurus

    Jan-P Morning, Over the weekend found I had a CARGO 130675 in my MZ spares box. Tried it,briefly, it worked. Noted your fuse suggestion which is a wise one I'll incorporate if i decided to use the 130675 (or alike) permanently. If I=V/R then rotor amps=14.5v/5.5ohms=2.6A?? Would a 5amp fuse in...
  3. thenarrowboatman

    The devil is in the detail

    The devil is in the detail
  4. thenarrowboatman

    Calling the Electrical Gurus

    Brillant Jan-P You have helped me on the way. Am I right in thinking if I connect the regulator wrong I am going to fry it and not the field coil/rotor? Thanks very much Tnbm
  5. thenarrowboatman

    Calling the Electrical Gurus

    gggGary, Single, three relay regulators? Seriously challenging my knowledge there! Tnbm
  6. thenarrowboatman

    Calling the Electrical Gurus

    Jan-P thanks again. The vr3639 looks like what I've been considering. For confirmation your 1980 has alternator field coil power regulation rather than ground regulation. Much appretiated Tnbm
  7. thenarrowboatman

    Calling the Electrical Gurus

    Thanks gggGary. What is complicating the TXA/MZ comparison for me is the MZ has three extra diodes 'diode -trio'? powering the 61 connection to the charge light and standard mechanical regulator (as per the diagram). Is the output from the MZ rectifier at D+ and 61 not the same? Like I've said...
  8. thenarrowboatman

    Calling the Electrical Gurus

    Jan-P. Is your bike an xs650 1970-1979 ( type B alternator )? What is the number of the Bosh regulator you are successfully using? Cheers Tnbm
  9. thenarrowboatman

    Calling the Electrical Gurus

    Jan-P thanks for your thoughts. My haynes manual gives the output for the early Hitachi LD115 alternator on my TXA at 11amps @ 2000rpm. Since the MZ manual indicates alternator output is 15amps (@rpm?) I was hoping there would not be any problem there? This is where my electrical understanding...
  10. thenarrowboatman

    Calling the Electrical Gurus

    Ref Post 1974 TXA Regulator I have a long standing fondness for MZ two strokes. My ETZ251 might be very ugly but has been exceptionally robust and reliable, standing idle for months then starting third kick and taking me away for the weekend with little trouble. The widely excepted replacement...
  11. thenarrowboatman

    1974 TXA Regulator

    Thanks 5twins you've supplied option A. Anyone know about Mobiletron VR-B191. Used to replace mechanical Reg on MZ two strokes ( b type alt but with diode trio).
  12. thenarrowboatman

    1974 TXA Regulator

    Fellas I've been browsing this site for years and its guided me through acquisition, recomission and riding my 1974 TXA. Thankyou. With some miles now covered the inevitable age related issues have begun to arise. I have some charging problems I'm working through at present. Rectifier failure...
Top