OSSA

Hi everyone, I own my 2014 tri280 over 7 years. I use it only a few hours a year in my backjard. No oil changed or repairs were needed. Untill now. The clutch is starting to give problems: When "clutched" ( i mean brake connection between crank and gears) it starts to drags al little. I have to brake otherwise it will slowly drive away. The point of engagement (? if this is the correct term, im not sure) hasnt changed. When "not clutched" there is no slip at all. (sorry about bad english, i try) So before taking everything apart I read as much as possible. Found ossa-efi.com. Thanks a lot Konrad for your work. I found stuff reg…

Just bought a 2014 TR280i with an explorer conversion kit 1) how do you connect the explorer tank to fuel system 2) does anyone have the part number for the easy start system as the one supplied doesn’t look correct ? thanks

Hi, Anyone have a wiring diagram for TR77? Looking for information on the magneto wires, I have 4: Black - Ignition Yellow - ? Green - ? Pink - ? I am assuming one is for the horn, one for lights and one for brake light. Carl.

Just purchased a 73 SDR and would and like the specs and capacity information. How can I get a copy of an owners manual?

Hi all I’ve just picked up an Ossa 300 - 2014. It’s got the updated battery pack helper on the front end with the AAA battery it’s got a decent spark, but it just won’t start i cannot hear the fuel pump at all, ive cleaned the injector and tested that with a 9V battery and it’s working fine when are you meant to hear the pump prime? First/second kick? I have the fuel line off the injector and nothing is coming out

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?

Just added a section to my website on identifying model years based on VIN and motor number. See it here: https://www.ossa-efi.com/home/factory-documentation/model-year-identification I would love to gather more examples, and possibly even create a registry of where bikes are roughly located. If you don't want to share your complete VIN, even the 10th character would be helpful. Likewise for the motor number, the two characters after the "I" would be helpful. I'm especially interested in finding examples from 2015. Feel free to contact me by PM.

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.

Anyone know where the dust shields are obtainable, i have seen them as part of a kit from the USA, but can’t find them anywhere in the uk?

Hi everyone, as promised i'm sharing the entire 2012 Explorer 280i project to provide as much information as possible to those who need it. Here is the bike before complete disassembly: The bike starts (with difficulty) has good compression (forgot to test it before opening the engine), the gears are ok (neutral doesn't go in easily), the engine's electrical system works but nothing of the Explorer's additional system works; A 12V battery with flying wires that activates the pump and ECU has been added by someone previously. The engine runs very very rich and makes a lot of smoke (the locomotive from Back to the Future III makes less smoke) …

Restoring 250 OSSA (believe it’s a TR77). Fork stanchions are pitted and could do with replacements. They look like Betor 35mm but the stanchions measure 610mm, replacements stanchions for TR77 are listed as 585mm. Anyone come across 610mm stanchions fitted to OSSA?

Hello everybody, Does anybody know where I can buy a Kickstarter for my 75 250 MAR in the UK? TIA Colin

Hi I have the rim and the hub and 36 x 90 degree spokes. I'm told they can't all be 90 degrees, half of them have to have a lesser angle. Anyone know what that angle is please? Its a front, 21 inch Akront from a 1974 MAR 250 Cheers Sid. Update.. The bike was a basket case and came with just the front hub and rim, no spokes. So.. In my ignorance I ordered 36 90 degree spokes from Poland because they were half the price of the Ossa kit. WRONG! I should have asked yous for advice first. There are two sets of eighteen, inner and outer with two different angles for each. I've just ordered the correct spokes from Trial World Thanks all fo…

Hi all. Has anyone got a picture or diagram of how the rear brake cable connects to the pedal bar and the rear wheel. Cheers Sid

does anybody know where i can buy a new fuel fitting that threads into my carburetor? This bike’s a bar find so some parts are missing off of it. My bike is a 72’ OSSA 250 Mar

Hey everybody, I've been searching for the right flywheel puller for a few days now. I need to pull the flywheel off of my 1972 Ossa 250 MAR. Im pretty sure that the thread is 26mm but i have no clue what the pitch is. Does anybody know where I can get a flywheel puller for this bike?

hey all, i’m trying to replace the stator in my 72’ 250 mar but i’m not really sure what to do where i’m at. i have a vague idea but i’m just making sure i don’t mess anything up. i was wondering if anybody knows what i need to do to get to the stator from here? thanks.

Hello I just bought my first bike at 52. Always wanted a trial bike as a kid and I thought I'd better get on with it. Anyway I got a 72 MAR recently. It's in bits and mostly complete. Of all the parts I can't seem to get hold of it's a kick-start lever. If the bike was built up it wouldn't be such a problem but obviously I need to turn the engine over to build it. Anyone know where I might get one? I'm guessing they're the same as other Ossa models.

Hello all, Do I need a chain tensioner if I'm just green laning my 250MAR? TIA

Hi I need to replace the damaged VIN stickers on my ossa mar and tr77 so does any one who does them .cheers thackers.