Jump to content


Site Supporter
  • Content Count

  • Joined

  • Last visited

About fourex

  • Rank
    Advanced Member

Previous Fields

  • Bike
    A few.

Profile Information

  • Location
  • Gender

Recent Profile Visitors

4,276 profile views
  1. fourex

    Montesa Cota 330 owners.

    I'm curious to know how you find them both also, both look to be cleverly modded .From what I can see the one you mainly ride has the frame rails removed and a good sized alloy bash plate fitted and the 'Puma' one has a completely different exhaust system from standard. They both look awesome, I'm envious.
  2. fourex

    montesa honda 349 fork yoke

    The MH 349, 349/4, 350 forks are all 170 mm when measured centre to centre at the yolks, earlier 349's were narrower I believe.
  3. fourex

    Fan trouble

    Buy yourself a multimeter, switch it to resistance (ohms) and check across the thermostat terminals with wires disconnected with a cold motor, if it's shorted than the thermostat is cactus.(as copemech stated). Swapping the polarity as you have tried proves FA, on some electric motors this may simply cause them to spin backwards. On other electric motors with diodes and such that are polarity conscience you are basically shorting them out. A multimeter is your best friend and will be forever. I'm an electrician in Australia and trust my life on "Fluke" brand multimeters but they can be a little expensive, a cheap 'digital' job from your local auto shop or hardware will serve you well.
  4. fourex

    Need a Kick Stand

    http://www.swm-moto.services/ricambi-moto/telaio/cavalletto-tl-detail.html PS: I need a Kick Start lever for a Jumbo if anyone can help, it's the same as all TL's I believe. Sorry to hi-jack Herman.
  5. fourex

    Stem thread fantic

    M20 x 1.5 is correct for my '84 300.
  6. fourex

    Cota 349 Gear box selector drum

    More possibly useful info.
  7. fourex

    Cota 349 Gear box selector drum

    Does this help ?
  8. fourex


    Half a kilogram in rear hubs alone.
  9. fourex


    I like the one piece tank/seat unit, can you divulge who makes them? Bottom rear shock mounts look to be an improvement on original.
  10. fourex

    Rotax Head DeCompressor Thread Size.

    Thanks, I ended up installing a 12 x 1.25mm helicoil and plugged it with a socket head bolt and alloy washer, I never really intended to fit a decompressor just wanted to return it to whatever was the original thread. If the 1.25 thread pitch is not as per original than it doesn't really matter now.
  11. fourex

    Ossa MAR ..restoration advice please!

    Here's a pic of an original mk2 right side engine case.
  12. fourex

    Ossa MAR ..restoration advice please!

    The mk1 and mk2 frames were slightly different in one area that I'm aware of and that was the length of the rear mudguard mounting bracket, it was about 25mm longer on the mk2 to compensate for the longer swing arm I assume. I can't see the bracket on ScottyA's black frame, looks like it has broken off. The location of the top shock mounts would suggest mk1 or mk2 frame. Also the right side engine case is not mk1 or mk2 due to the shape and oblong hole but hey, this could have been replaced with a different models case or modified at any time over all these years. Below is a pick of my mk2's bracket which is cracked and ready to fall off but is longer than that of the mk1. You might have a "bitza" ScottyA.
  13. pmk, I'm totally confused, didn't all this OZO talk start with the 12mm spherical joints not being suitable for the 14/15mm top lugs on a MAR. Where are you going with this total dismemberment of the Ozo's ?
  14. fourex

    OZO Rear Shock Question

    I have heard Magicals referred to as glorified Betors in the past, probably read it on here at some point over the years however, I'm not sure if that really is the case. Maybe the Spanish fellow behind the Magicals brand was a past employee of Betor, who knows? As per the attached pdf from the Magicals website, only 12mm and 12.7mm spherical bearings available on their shocks, if you need 14 or 15mm top mounts as per MAR than you need to go rubber bushes, there's no pic of what they actually look like however. Ossa was a strange bunch of MoFo's in my opinion, they were ahead of their time in some ways with stuff like the alloy bashplate (not the plastic one), electronic ignition, exhaust out of harms way and robust frame of larger tubing but then they gave us probably the worst brakes at the time, spindly 12 mm axles, crazy chain tensioner incorporated onto the brake spindle and 14/15mm top shock mounts. Gotta luv how good they look though. Magicals Rear Shock Top Eye Variations..pdf