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  1. Started by adam19871,

    Could anyone tell me if a stator from a 1973 175 will fit a 1972 250?

      • Like
    • 2 replies
    • 1.9k views
  2. Started by deputy dawg,

    hi where could i get a year of manufacture for a ossa mar so i can get it road registered. many thanks

    • 5 replies
    • 4k views
  3. Started by lotus54,

    Ok, I broke one of the 'Dogbones' in my rear linkage. It is the new type with a bolt. After a lot of thinking, it probably was my fault. I think when I lubed it last time there was still silicone grease in the threads. So the locktite couldn't hold- the bolt backed out and must have jammed against the swingarm, breaking the shaft. The too much for one side still left when I hopped over something. Anyway, the dealer ordered the part, but OSSA sent the wrong one! There appears to be a mixup with the part numbers in the manual. So...does anyone know where one may be? They are going to try and get one, but I'm looking also. Please let me know. Mark

    • 2 replies
    • 1.9k views
  4. Started by Saulus,

    Hello ossa users, now that im a proud owner of a ossa tr280i i wonder whats the best site to get spare parts like clutch etc.... I'm from italy and the best address i found until now was nonstopmotoren.com but even there is no clutch. I wonder if there is any other branded clutch (maybe gasgas) thats compatible?

      • Thanks
    • 3 replies
    • 3.8k views
  5. Started by ColinPybus,

    Hello All, Recently rebuilt my engine, but I can't find neutral. Can change through the box using the kick-start, but it's always in gear. Any ideas? Thanks.

      • Like
    • 8 replies
    • 1.6k views
  6. Started by jsp,

    Has anyone changed there coolant in a TR280i was it much of a job to do ? mine looks white in the top of the rad so was thinking of maybe changing it

    • 7 replies
    • 3.4k views
  7. Started by krash69,

    Looking to replace just the pick up on bike as stator bolt sheared off and took out coil. need to know its output etc to try and replace, Thanks in Advance Krash

    • 0 replies
    • 1.2k views
  8. Started by Tommygunz,

    I got a 2015 ossa explorer any idea where I could get a fuel injector? Any help is appreciated thanks in advance

      • Like
    • 13 replies
    • 2.4k views
  9. Started by bertie,

    Im in the process of restoring a 350cc gripper and was wondering if anybody has a photo of the bracket that holds the seat down and where the rear of the tank bolts to as the one welded onto my frame has been broken off , dimensions of the bracket would be very helpful also . Also has anybody changed there original silencer with a alloy repackable one that can be recomended . Thanks for any help Bertie

    • 0 replies
    • 1.6k views
  10. Started by trialsrfun,

    Does anyone please know the bearing sizes or numbers for a 250cc OSSA TR77 so that I can have them to hand ready for the rebuild, Mains, bearings & seals, are both main bearings C3 type Gearbox bearings & seal Frame steering head Front & rear wheel bearings

    • 0 replies
    • 1.3k views
  11. Started by marty66,

    Well tomorrow I'm doing a trial on a borrowed 250 mar to see how I like the bike before buying one. Already had a little play around the yard on it and was impressed on how smooth it was compared to the fantic iv been riding. The power comes in so steady with no snappy jumpy movement which also made it great to turn tightly. Hopefully the weather will turn for the best and the trial won't get cancelled. Will post how I get on and how the bike rode.

      • Like
    • 15 replies
    • 5.2k views
  12. Started by aircooled4ever,

    Has anyone else seen the ossa on fleabay? I think someone's going to get well and truly lumbered with that as James only paid £1500 the year before, oops!

      • Like
    • 9 replies
    • 4k views
  13. Started by vgstef,

    I just read this ossa

    • 10 replies
    • 5.4k views
  14. Started by trialtrial,

    How's your spanish? SOme Looks like they build 5 or 6 bikes at a time...

    • 3 replies
    • 2.7k views
  15. Started by minienduro,

    Any one know where I can pick up a replacement ECU for a 2012 OSSA Explorer.

    • 1 reply
    • 1.7k views
  16. Started by theonemanyuri,

    Hi guys, I'm completely new to trials, well motorbikes full stop. There's been what I think is an Ossa MAR 250 sat in the shed for the best part of 20 years now, purchased by my old man for a tenner. As I've got a bit of time on my hands I've started taking it apart with the hope of getting it back to somewhere decent nick (never worked on a bike before but I'm a fairly competent mechanic and engineer). I haven't got as far as checking the frame and engine numbers yet to find out specifically what model it is, I was just wondering if the pattern on the tank is stock? Most of the early models have the green stripe of some sort but i recently saw one with a red stripe? Unf…

      • Like
    • 8 replies
    • 3.8k views
  17. Started by lotus54,

    2015 Explorer I need to replace the clutch fixer shaft and bearing. I removed circlip and I assume after heating the case, it should just tap out- bearing and shaft? It did not come out easily tapping from other side, so thought I would ask before trying again, perhaps with a slide hammer.

  18. The story of this OSSA is posted up in introductions...I am in the process of bringing this back to life. Unfortunately gas was left in the tank for a very long time and when I pulled the Amal 627 off to rebuild it was filled with goo...I'm assuming resin from the Fiberglass tank? I cleaned everything in a dip type carb cleaner and it looked pretty good. I put it all back together and using an auxiliary fuel tank I turned the petcock on tickled the carb and gave it a few kicks. Nothing. I gave it a quick shot of starting fluid and she fired up but bogs badly when I roll the throttle on. It seems like it wants to run on full throttle but bogs from partial to mid throt…

      • Like
    • 9 replies
    • 2.9k views
  19. Started by higgo,

    Hi everybody, my queation for all you ossa experts is how much would you expect to pay for a 1981 250 Gripper. It is a runner but does require tidying up. Cheers HGGO.

    • 1 reply
    • 2.5k views
  20. Started by basher,

    Im looking into a new bike ad I was going for a montesa. I orignally looked at ossa's but heard alot of negativity about the 2011 bikes, which over shadows the good points really. ive read a few bits of topics but theres no real topic on 2012 bikes yet. is the 2012 a much better bike with all the previous problems being solved? or are there still issues that need addressing?

    • 12 replies
    • 4.9k views

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