OSSA

Hi all, at the moment I am riding a 250 Mar in comps. Its a great bike, does everything it should but i think its lacking that something extra in the engine department. Its on its first oversize with new piston and rings, 26 mm Mikuni and thinner head gasket. The engine pulls from nothing, but just seems to lack that sharp response when power is needed. So my first question would be, is this a characteristic of the engine? Secondly I have a 250 gripper engine sat in the corner of my shed and was wondering would I get much benefit fitting this in my Mar chassis, and would it cause me much hassle? Cheers HIGGO.

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?

last sunday the main shaft in my tr280i suspension gave up the ghost which then snapped both my linkage arms. after a quick strip down sunday night i rang Ossa UK monday am to be told no problem post the broken parts to you dealer and we will supply the new 2013 kit which is a lot stronger. weds am all the parts came so a big thank you to Ian at trials & tribulations and Nigel Birkett at Ossa UK for excellent customer service. jsp

I want to reduce the size of the spread to the grips and levers. As this is really tiring on a full days riding. The system is AJP anyone know who makes an Ossa green AJP short lever for clutch and brake? Scorpatic

http://trialsport.se/pdf/service-specialdelar.pdf Some nice stuff.....

I don't think this news has made it to Trials Central yet. Check out the LewisportUSA site for the official announcement: http://www.lewisportusa.com/ I ride a lot with Lewisport Southern Cal Rep, Bill Merritt, about once a week and have gotten to try out the new bikes as they come out. They may yet tempt me off my Raga. Bill rides the OSSA as his daily practice and competition bike. I have nothing but the best to say about Bill's commitment to the bikes he has sold (Gas Gas, OSSA and Beta), to the buyers/riders and to both the practice and competition aspects of the sport. Based on my experience and interactions with Bill I expect that his closer involvement now…

As above, has anyone tried to fit the new style flexi rear fender on the old style seat base? If so, is it a direct bolt on or was there a modification required?

I have a 1970 ossa plonker/pennine.Does anyone have an idea of how many were sent to the united states ? I,m just curious if it was a rarity here.

Hi i am trying to contact the owner of a ossa with registration number AE12GXW who rode the lakes two day, please can you pm me with a contact number, i have some bits of yours

im trying to remember the year? im guesing 1983,1984? im sure beta,s were pretty new on the scene, i was at the scottish six days and peter quinn had a selection of bikes for sale at the time, i somehow managed to get my father to buy me a new ossa 250 gripper from peter, im sure he had a few for sale all orange frames with one piece white fiberglass tanks and mudgaurds, just wondering if anyone else remebers these bikes ? stuart

hI Guys can anyone give me the std shock length (eye to eye) for 250 gripper. And what shocks seem to work the best, magicals,rockshocks falcons,etc etc ?????

Just about to replace sprockets. what would be the best sprocket sizes front and back for genral trials sections. Many thanks.

I just bought the new Explorer. I ride in wet and very muddy terrain. This bike desperately needs a mud flap at the rear to help keep the shock and linkage cleaner, but not sure how to attach one. Has anyone fashioned one yet? Thanks.

Hi everyone, Im on rebuilding my 1972 mar and im needing advice on oil types and amounts. I've replaced the fork seals and I need to know what type of fork oil to use and how much to put in each leg? Also Id like to change the gear oil does anyone know what oil to use and how much to put in? Thanks Graham.

Does anyone know of a after market rear brake lever that will fit a 2012 ossa, ive bent mine a bit and wanted to buy a spare but a ossa one is £70 which seems a bit steep jsp

im new to ossa so many questions to over next few weeks, just got myself a 1972 250 mar , starting with my first question , i need to get a good match for the frame colour , any help would be great to get me started . i also need engine case bolts

Anyone seen any after market 2012 280i rear hubs ??? snapped a disk lug off today so need a new one and would prefer to get a bling coloured one rather than a std Ossa one. If anyone has any idea please post up. Cheers in advance.

I'm after a 2013 Seat and Rear Mud Guard, anyone know where I can order one from? Also interested in the air filter/wiring kit which is in the special parts catalogue.

So I assume by now that most people who are experiencing starting issues either have the original LSS type starter pack installed, or have the 9v battery version which is smaller, simpler, and avoids potential flooding by only charging the electrics and not the fuel pump. Just as a matter of interest, if you were to use a rechargeable 9v battery on the 9v system, and say, kept the circuit open when travelling between sections, would the system recharge the battery or would the combo capacitor and 9v battery in the sytem have a negative effect. I know changing a standard 9v battery on this system is no big deal, my questions is more just a matter of interest as to whethe…

Hi My friends Ossa TR280i started to smoke real bad and was running poor when trying to accelerate. It was perfekt on idle, but as soon as the engine got some resistance it started to smoke and was misfiring. The smoke was white/greyish. New sparkplug did not make a difference. The cylinder head gasquet is ok, and the radiator coolant level is also ok. When i say smoke real bad, i mean enough to get waterbombed by a fire department helicopter. I can only think of two things, something electric, maybe with the fuel injection or perhaps the gearbox oil is entering the cylinder somehow. But the oil level seems to be ok as well. Its a 2 month old year 2012 bike. Any thou…