OSSA

hi all,my 2011 ossa has developed a vibration at about 2/3rds throttle. up to that point all sounds well and starts fine.I cant find anything loose anywhere to cause it.The spark plug was black and a bit oily so I was wondering if the tps was a bit out would it cause the vibration.

Hello everyone, I'm Matteo from Italy, I have a Ossa tr 280 of 2012, the bike is fine but I have a couple of problems to solve unfortunately in Italy there is nothing and there are no active forums, I need help I would need the kscan program and the explanation on how to build the connection cable in Italy it costs around 550 $ and the program is not found. can someone help me? I should also connect the front LED headlight but I do not have the switch on the handlebars, what are the cables to connect? I will put a hidden switch I apologize if my english is not perfect thanks a lot to everyone

Please inform me how to add crankcase oil and how do I check the oil level? Thanks.

.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

Hello, I would like to know if there were OSSA MARs (MK1) with a four (4) speed transmission? I live in the USA, so I don't know if some 4 speeds were ever imported. What engine number sequence would I be looing for (M-344 XXX)? You don't have to tell me the best way to find out is to ride the bike....Lol...I would, but the bike is 2,000 miles away. The seller claims it is a 4 speed, but I have my doubts/want to confirm. I thought all MARs were 5 speeds. I appreciate any information.

Im doing up a '74 Ossa 250 MAR and ordered a the replacement alloy tank for it. When the tank arrived it looked great but its too narrow by 10 mm at the front where it goes over over the rubber mounts. I can modify the dowls and rubber mounts on the frame with a grinder and shoehorn the tank on but would much prefer get the correct tank.. Any advice???? Jim

Hi! I’m just looking to buy a bike. I’ve been looking at an Ossa tr300i Factory 2013 and I would like to ask few questions about it. 1. Is it reliable? 2. Are parts easy to get? Any other information about the bike or brand is also apreciated. Thanks in advance

Does anybody know what the bracket shown in the attached picture, on my OSSA MAR MK3 frame is for? Is it for mounting a horn? If so, does anybody have a horn that fits?

Hi. For those who want to know how to disassemble the gearbox, the pinion must be heated to about 200ºc. Now I'm going to change the bearings. They are references of Gasgas. MT280236158 MT280232043 Cheers.

Hi I am rebuilding an OSSA MAR MK3 and am missing the felt seals and covers for the steering assembly upper and lower bearings. Any ideas where I can get them from. Also after lights and horn and switch, and, lights and speedo mounting rubber brackets. Gordy

Hi, my fan started sqeeking so I bought a replacement from Adrian @ Lewisport here in Ca. What is the best way to remove the fan? Fyi the fan is from Jitsie, fits 02-12 gasgas and jotagas 12-16 Thanks, Phil.

Would anyone have bearing numbers for all the needle bearings in the gearbox. I would like to replace everything while I have it apart. Would anyone have recommendations on where to order the bearings from. Thanks in advance.

My 2013 TR280i has started to smoke recently, any idea what might be the cause? Doesn't run so well as well and it doesn't seem to be the fuel mixture issue, I've tried with a different fresh fuel/oil mixture and still the same. I figure it's maybe a gearbox oil leaking slowly into crankcase room, but where that leak might occur, a bad crakshaft seal in one side? Any ideas?

I'm a newbie and my bike seems to be geared a bit higher than other bikes I've ridden. Does anyone know of other bikes the countershaft sprocket would cross reference to?

Anyone know the timing setting for a 1984 250 gripper tr80? (** edit 1984 doh **) Found this for older models, is it near enough? Thanks guys..

Has anyone experience with the new fibreglass replacement petrol tanks, coming out of Spain for MAR's and TR80's? Do they stand up to the new fuels or do they have to be lined?

I'm contemplating buying a 2012 tr280i, but am concerned about the spares situation now that the factory is closed. I spoke to a chap at Trials & Tribulations who was very gloomy and basically told me not to touch it. Birketts are currently closed so can't ask them. Does anyone have any views or advice? Thanks

I recently added a trail tech in coolant temperature sensor to my 2014 Ossa TRi 250, I am seeing coolant temperatures of 220 to 230 degrees F during extended climbs of 1000 to 2000 feet at 5000 ft elevation. Can any Ossa owners confirm the coolant temperatures they see during high load operation. New cooling fan, radiator clean, fan relay good, fan turns on at about 160 and off at 155. No lifting of radiator cap relief, idle speed drops about 200 rpm at elevated temperature. See coolant temperatures of about 150 to 170 during normal trials riding activity.

I have been trying to ring for weeks and cant get through, he is usually bang-on re getting in touch? Does anyone know if he has changed numbers or something? I want to get my old Ossa up and running! Thanks all

Hi. I was hoping someone could help med with a problem I have. After winter storage my 2013 Ossa TR300i keeps boiling. Fan won’t start but I’ve tested it out and the fan works with direct power. I’ve read multiple post’s on this but still can’t figure out what’s wrong. I’m no pro when it comes to MC engines so I’m having some difficulties figuring out everything. I was thinking of sending it to service, but found out that it cost almost as much as I gave for the bike so I’m hoping I can fix it myself. Thus far I’ve checked all connections and they seem fine. I’ve ordered a can of Evans waterless cooling hoping it will stop the boiling but i think I should fix …