OSSA

Following the last trail I did, I now unfortunately have a crack between the sump plug hole and the case edge. I assume the only way to fix this will be to strip the engine and get it welded ?! With this in mind what parts at a bare minimum will I require ( seals, gaskets, bearing etc...) I don't know anything about the history of the engine, the power seems ok ( though I have never rode another MAR to compare it to), but whilst it's apart what else would you suggest I consider doing to it ? On the same trial that I cracked it, it started slipping out of first gear and going to neutral. I have re-ground a better point on to the detent pin which has …

Can anyone give me a list of bearings and seals needed to rebuild the OSSA mar engine ??

I have a 2014 tri 300 and the braktec front calliper has started to seep oil between the two halfs ,I take it the rubber seal has probably split. Problem is when I've looked online for the repair kit but they only show for the gas gas racing models and never ossa is it still the same thing? And there tends to be two types one for around £20 and one newer version for about £40 anyone know which would be the one I need?

Hi think i found a clear protector for my carbon termignoni the sides were wearing and turning grey. I bought this stuff about fifteen years ago and still had it laying around so i tryed a small spot first a light scuff with 300 grit. Then brushed it on let it dry over night wow you couldn't tell it was worn. The heat dosnt bother it leaves a hard finish. If and when it wears add another coat. ?

Hi all I recently restored a TR77 that I got as a box of bits many years ago. It is now up and running (and road registered too!). When I first rode it, the clutch was SO heavy, and gear changing was very difficult without crashing and clonking them. I thought this was possibly just a clutch problem as it was so heavy. I took the clutch cover off and removed a plate - the outer metal clutch plate - to allow some adjustment, as the springs were already as far out as I could get them. This meant that the outer pressure plate ran on a friction plate (I ensured that it was flat and smooth first), and when I reassembled it all (again with the springs as far out as I…

Can any body tell me if the 76 OSSA MAR was available with a black frame? I am starting the restoration on one and it is painted black. All the pictures I have seen seem to show a silver frame. Either way can you advise the paint type/ colour? I'm also after speedo and lights.

Had a lot of fun at a Trial this weekend.

Hi all, first time poster here... I have just bought a couple of Ossa's to have a go at duffers trials of some sort. I need to remove the RHS crank case half to get a little bit of welding done (very small and barely necessary, but I am a bit OCD with such things...) Anyway, I have a question. The manual seems to show that it is entirely possible to remove the RHS crankcase half whilst leaving/not disturbing the crank and gearbox shafts clutch and what have you in the LHS crankcase half, is this the case? Of course, as this engine is a complete unknown quantity and I have not bought it running I could find out that having split it i need to replace a shed …

Not restoring. Building a resto mod rider. Trying to keep the 73 theme though. In regards to the aluminum parts, I am not 100% certain on what parts get polished. The fenders /mudguards are plastic, so those will not be polished. Currently I have polished the front and rear rims, front and rear hub ignition side cover, lower fork legs. Next will be the brake backing plates, and clutch cover. These items I am not sure about if they need polishing or a brushed type finish. Triple Clamps? Clutch and front brake levers? Lever perches? Sheet metal aluminum chain mud guard? Skidplate? Rear Sprocket? …

HI, Can anyone help. I have a 2013 Ossa TR280i and i have notice on the LHS of the bike there are 2 wires not connected and without a connector. Upon closer inspection they appear to be Green and Black and i think they should be connected to the Sensor Gasolina. Can anyone shed some light on the function / location of this. The bike runs fine !

I own 2014 Ossa explorer which I used it for difficult track trail riding. It has standard 10 tooth front sprocket. Do anybody know where I can get an 11 tooth front sprocket ?. Most mail order shop only stock 9 or 10 tooth. Or is it the same as some other bike brand ? Thanks

Well, I heard another rumor that OSSA may be back before next winter with 2018 bikes! of course, it is always 'we will see' but this one seems it could have a bit more truth than some. Anyone heard anything lately? Mark

Hello. Can someone be kind enough to let me know what the wiring arrangement is on an OSSA MAR Motoplat. Here is what I have. Blue / Black - go to the coil. Any idea what the following do; Red / Brown / Green & White. im looking for 6v DC to drive a horn or a supply I can regulate. thanks.

The front pipe i have for my ossa the previous owner has tried to clean off the chrome to paint it, for what ever reason, has anyone here had theres ceramic coated ? if so was it worth doing. A replacement would be a bit expensive Many thanks

Hi Guys, My 2012 Tr280i Ossa shut-off while riding and did not want to start again. I’ve already check the spark plug (was dirty/black), checked the air filter (was clean) and checked that the gas pump was working and it was. Then, I replaced the spark plug … but still... doesn’t want to start. I guess the next step to test should be whether there is electricity or spark being generated?... however. the spark-plug cap is so deep that it seems pointless to put it against the frame and kick it to check it (as on a regular carb bike) + this one being a fuel injected… I don’t know whether the best thing to check is through the “Diagnostic Software” ? or is there any othe…

I don't now recall who was having some odd running issues, but thought I'd post this idea up for anyone now or future. My 2014 Explorer (same as trials with added subframe, tanks, seat etc) had an off-idle 'burble' a couple of times. At around 100 hours, then again around 200 hours. A TPS adjustment/reset solved those. Normally it runs nice and clean from idle all the way to max rpm. No burbling or richness. A few months ago it started again, and nothing seemed to solve it in the 'usual' areas. But I had never taken the main ECU connector apart. All the other connectors on the bike were well sealed and looked good, and the one time I tried it didn't…

Hi everyone. I have no idea what I have got and would like some help. I have picked up an old Ossa in the UK. It has a frame number of B630024. Have trawled through the various frame identification lists Is it a TR77? Any help or advice very welcome. Regards

Hi, after finally finishing the rebuild and starting it up I've a problem with the clutch. At first I thought that the plates were stuck together but it's the action that's the problem. I pull in the lever and it stays there until I manually pull it back. It's a new cable, so I don't think that's the problem. Any ideas gratefully welcomed. Also the carb seems to be in need of adjustment. There only seems to be one screw that I can see, it's on the l/h side of the carb but I thought that it was the idle adjustment. The bike starts fine but if I stop it and try to re start it won't unless I remove the plug and clean it. Help!!!

Who does Ohlins service in the States? Any recomendations? I have ave a bunch of hours on the rear damper and figured it is probably overdue. I don't have the tools to do it myself, although perhaps I should investigate that. mark

After rebuilding my mk 2, except the engine, I've finally kicked it up!!!! Can't believe it started after the 3rd kick. My only concern is that the clutch isn't working. The lever pulls in but stays there, are the plates stuck or is it something else?? I haven't tried putting it in gear yet as the tank isn't connected yet and it runs out of fuel pretty quick seeing as I'm only filling the carb. The bike has stood for over 3 years but ran lovely before I attacked it!!