OSSA

Anyone out there who owns, or knows someone who owns an Ossa Pennine trials. Alan Wright is looking for one to display at Telford in February, so if you have one that you're willing to show or know of someone that might be, then Alan would be keen to hear from you

Ok I'm looking to replace the old amal concentric mk1 carb on the Ossa mar 350 and I've come across the Nibbi carb. Are they any good? Anybody used one?

I have the 2011 280i and it appears to only run one bearing on the disc side, which I have replaced. I see there is a conversion kit to upgrade to a 2 bearing type but can`t find anyone that has it in stock. Anyone know where I can obtain this kit at a reasonable cost with shipping to the UK ?

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…

Went out riding on Saturday and my 2012 ossa wouldn't start at all, checked the plug and it was bone dry, checked a few connections around the plug and tried again and it fired into life. could this be the start of a fuel pump problem I ve heard of people having problems but not sure of the symptoms jsp

Time for new steering stem bearings.The pullers in my toolbox won't get at the tiny outer races tucked into the head of my 2011 tr280.The engineers didn't even leave enough room to get a punch in there to whack it out.Anyone?

I'm thinking of buying a 300 factory its listed as a 2014 but after a bit of reading am sure its a 2013 by the forks and calipers. Can you tell by the frame numbers? Anything I need to check apart from the usual things to look for on a trials bike? Will the 2013 bike have the easy start kit fitted? Is the data cable, software and maps readily available at a reasonable price? I currently have a 2004 Beta rev3 and have only been riding for fun just over a year. If I find the 300 a bit much can it be easily tamed with a slow throttle and flywheel weight? Thanks in advance.

I have Pirelli MT43 tyres to fit on my OSSA MAR mk3. What tyre pressures should I use for road use?

Hey mods, can delete if not allowed. As Lotus54 knows, I recently cooked my Explorer ECU through pin 3. No damage to the harness, the plug is cooked, but that can be replaced. So I'm wondering, as I hunt around for options, if anyone, anywhere, has a known working ECU (or 2) they are willing to sell. It is the 520030211 unit, but I'll take whatever ya got at this point. My only other option(s) at this point is to sell the bike for parts (not what I'd like), or to install a standalone ECU, which, if I can't find a factory unit, is the route I'll likely go down. Post in the thread or send me a message on here if ya have anything! Cheers!

Wonder if anyone knows where I can Get any long carbon frame guards, I Have seen them on a satellite teams Bikes but can't find where to but them

Hi all .. looking for some un-biased thoughts .. I have been looking to return to trials , and one of the bikes I have seen is a Ossa Tr280i , 2012-13 .. the bike seems to have had very little use , and has had two owners ,, the first owner had issues with the bike not running correctly and would go through plugs, so the bike wasn't used .. The second own was an older guy , and I had been told that the previous issue was to do with the fuel mapping , which had been corrected and so I'm told the bike is running good .. the second oner didn't ride the bike hard and put very few hours on it .. So now I have been thinking about buying the bike , I have look…

Anyone have any details?

Hi, it`s me.....again!! I was about to reassemble the yokes on my project and decided to look at the assembly instructions from the custGP site. Hmmmm...the parts

I have found many discrepancies on various sites for these two models. I thought they were practically the same and that only the colors changed. Is anyone able to elucidate me? On the Ossa website he says that there are different cases in one 350g of oil and 450g in the other. The total weight of the bikes is 2 kg different They have different gearbox bearings. I thought they were the same ? Do you know anything about it? Thank you

Not to stir the pot about new bikes and the rules regarding bikes in competition , What are we going to do if the new Ossa (release nov. 10 ... I think ?) http://www.ossafactory.es/v3/index.php#home Is a twinshock ,Watercooled ,manual disc brake machine ... Or if it is just a new twinshock ? Does it get to compete against the old twinshocks like mine , or does it go up against the modern bikes ? Only clue I see about the bike is TR280 injected ....... And is this the same folks that closed the Ossa factory doors in what 1985 ? Glenn

Can anyone fill in a few details on the Whitlock Ossa. (or were they sold as a Gollner Ossa?) Was it only a frame kit of were complete bikes sold? What was the colour scheme on the fuel tank? Standard Ossa or something different. The ones I have seen are a dark blue. Did they have any other mods apart from the frame. Cheers.

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…

Stupid question time .... How on earth do you remove the ECU from a 2013 onwards TR280 ( the ecu is mounted down by the cylinder ) . Do I need to remove the radiator first or am I missing something plainly obvious? Would like to make sure the plug is dry and fill with electrical grease but it's not nearly as simple as it first appears

I am so grateful for the help I received with my gearbox I want to give something back to this forum. I'm a retired electrical engineer and a hobbyist machinist. I have done a fair amount of work reverse-engineering the TR280i's electrical system. Cheers. I have replaced the .PDF file with an entire website: https://www.ossa-efi.com/home It corrects some errors and omissions as well as providing greatly increased technical content.

Hey guys, this is my first time posting so bear with me. Here recently i got a 1972 OSSA mick andrews replica. i’m pretty new to fixing old bikes so i need some help with these wires on the bike. Does anybody know what their purpose is and where they plug into? Also where is a good place to find an replacement ignition coil. ignition coil for the bike? thanks.