OSSA

i ve jus been looking at some photos of yesterdays practice lap from the west of england BTC and Guy Kendrew has a silver non sealed rear wheel fitted to his ossa, anyone know how to convert a std wheel to fit ? jsp

Hi, I have just bought an O.S.S.A, 350 (310cc) trials bike and wondered what the correct 2 stroke mixure would be for it. I have no manuals on the bike at all to check? Any particular oil brand would you recomend?

Just a curious question regarding shock mounting point size, I have just got hold of this project and just going over it to see what's what, and noticed the hangers for the shocks are quite big 15mm it's been powder coated by previous owner and looks like a collar has been left on all the mounts? Can anyone tell me what size they should be before curiosity gets the better of me

Hello can any 1 tell me the silencer on the TR77 250 dose it need the packing? I cant get into it dose it need to be cut open? I just want to make sure because its not my bike as am doing some work on it cheers.

Anyone used the nibbi carb as a replacement..? The Amal MK2 2627 on my TR77 needs a complete rebuild including a New slide. I can buy the nibbi And a selection of jets cheaper 🤦‍♂️ do I replace or rebuild

Hello. I am from Russia. Sorry for my bad language. I bought OSSA Explorer, and after 3 hours i get black spark(spark was new NGK BP5ES). Air filter was clean, and i use synthetic oil for 2 stroke 10 ml/1 l gasoline. Its problem because too much gasoline in injection. I dont have diagnostic cable, and i want to check all sensor and wires, fuel Injector, and fuel pump. I remove temp air sensor, throttle position sensor and fuel Injector to check. And my fuel injector have number FBYCG80 800 1808. Its fuel injector from Subaru Impreza I think its not original fuel injector, but look same. It's my its origi…

Should the head and barrel be black and if so gloss or matt?

Changing my fork oil soon for new 5wt as per Birketts info. 160mm air gap. Is this measured with the springs in or out? My plan was strip, clean and re bush/seal the forks. Screw the bottom bolts in to seal and then fill and work the cartridge to purge air. Before the springs go in I’ll measure and set air gap to 160mm- does this sound about right?

I'm helping a friend of mine to rebuild his Ossa mar we have got to the point of starting it but even though it fires up ok it refuses to rev up, we have the correct needle and jet in the Amal carb but as the throttle is opened it just seems to spit out fuel from the carb and doesn't rev up. The timing is set at approx. 3.5mm btdc and the bottom end has been rebuild by an old school motor bike engineer are we missing something obvious ? Any help would be appreciated.

I know it's not quite trials, but has anyone seen the beautiful work of art that is the expansion chamber on the new Ossa enduro-check out the Ossa Spain website-how DO they do that welding..... Will-in-the-mud

I have a contact email address for Steve of - steve@marlimar-uk.wanadoo.co.uk I have sent an email and it has been getting bounced back everyday since about Wednesday. Does anyone if it has changed ??

Without question everything is not rosey at ossa but ffs they finished the ssdt and (I am guessing here) emma bristow won the ladies event last weekend. then theres the cabby/raga type special called a Fajardo anyone know why its a secret? Maybe they have only just got the internet in cumbria but the pr in the uk is rubbish. Why? maybe the faults if there are any are so big they don't want to mention the bike at all but its a new bike its not going to be perfect and its streets ahead of the Sherco-greeves.

After that short statement maybe 3-4 months ago from ossa head honcho Joan gurt, nothing? Looks like all the doom Sayers were correct.....unless anyone knows different? Any news? Good or prob bad!!!

Thinking about taking the plunge, have never ridden trials only Enduro and MX. A nasty injury has made a trials bike appealing due to weight and less stress on my arms. I snapped my humerus in two early April (MX) and has surgery eight weeks ago. I should be able to start riding in August and a light weight bike that is less powerful than my SXf 250 is appealing. I want to use it more like a MTB with an engine though than rock hopping and to get onto single tracks in forrests. So, noise pollution is a consideration - compared to my SXF, how quiet is the Ossa? The Ossa appeals as it has EFI and I am not a bike tweaker, want to drop the oil and ride it without dicking …

.I am the owner of a 2011 Ossa tr280i in Ontario Canada.It has the original rear hub bushing/bearing setup and it is need of a new bushing. I believe the skf # is "pcmf 353916 e".I know that there was a kit available at one time to convert the hub to bearing/bearings with a new pair of spacers.Does anyone know where i can obtain them? I tried local bearing suppliers,but they have a minimum order of $255. Thanks,Ric

I see on the front page , the results from Bootle Scrambles club show that Stephen Dixon won on a Ossa, is this the first win for the new bike?

Hello All am going to fit a rear sprocket convert kit to my ossa TR77 350 dose any 1 have any experience in fitting 1 please? It came with the big spacers with a bearing in it and the 4 bolts and a small spacer cheers bond.

I wanted to ask if any of you know if parts from the original Marzocchi 40 mm fit into the Ossa Explorer Ollé Fornt Forks?

Does any one know where this cable/spade connector go it a tr300i the black and blue to the coil but what about the orange, stripped the bike down and now can t remember where it goes ,cheers

My 73 MAR 250 has an IZD carb installed on it. This was what came stock on these machines. I am compiling a list of items needed, all cables are needed. Problem is, no where do I see the cable to go from the Amal throttle to an IZD carb. Would it be the same cable ad for an Amal carb or Bing?