OSSA

I recently put a new clutch in my factory 300 and it works fine but the lever is spongy as Hell and it feels like crap. I've never had such a hard time bleeding something in my life. It uses mineral oil, I first filled the lower cavity with mineral oil then attached the line so there was no air below that. Next I pulled the cap off of the reservoir and pushed mineral oil with a syringe attached to the cracked bleed nipple until it was half full. This method has always worked for me first go but not now for some reason. I've tried several times now and the clutch lever feels spongy as Hell, not nearly as solid as it was or should be. The clutch engages just fine an…

I use F type atf in the gear box, but every year my clutch gets very stuck. Any ideas for getting it unstuck right now and keeping it from sticking each winter would be greatly appreciated. Thanks

My son and I recently picked up a great deal on a running riding 74' Ossa MAR 250. Here we will post as we do the restore on it. The progress will be fast as we hope to have it ready for AHRMA at Donner this July. Now the bulk of the work is going to take place starting in June as we are moving at the end of the month and will start once we get in the new place. We will hit it hard for a month and the bike will be like new when done. I have attached a picture and video on the Ossa as it sat about 2 weeks ago.It runs perfect and sounds great. My son just putting it around for a shake down run. Stay tuned and glad I found this forum. Ossa Video of bike putting around

Has anyone yet determined if the Jitsie Ossa tr280 air filter is an addition to the regular filter, or a replacement? I have one and the dual foam filter looks like it could be meant as a replacement. At the very least it should make cleaning of the main filter less frequent as if it acts as a pre-filter it should catch 99% of the crap before it gets to the main. Sunlingkau, I think you also have one, what do you think of it, and do you run it as a pre-filter?

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

picked up a lightly used 12 280i. first ride 15 minutes in bike dies like i hit the kill button. now shows no sign of wanting to run. even 5th gear bump starts on a big hill. bikes seems to have spark but maybe intermittent? pull fuel line of injector and fuel pumping is pumping. very quickly regretting this purchase. anyone got any ideas on where to start looking?

Been troubleshooting a no start condition on my 2014 Ossa 250, found a dead aaa battery in easy start box, found broken wires in easy start, after changing battery it started first kick for a couple of days, loaded up went to ride finally got it to start several kicks, ran great good power, next day would not start found that 10 volts out of easy start not getting to control module, found broken red and black wires, fixed breaks still not starting reliably, started using Konrads control writeup and wiring diagram is conduct more detailed testing, I see 9.5 volts on the red wire at rectifier when magnetic lanyard button released, stays for about 40 seconds. Kick bike duri…

Ossa 300i can anyone confirm its year....

hi ayone know about the rear brake cablefor explorer is it mk1mar 12 inch outer or mk2 15inch outer. alternativly how long are mar swing arms. thanks

There's not much of an indication in the user manual about the fork preload. Is it the 2 holed rings on the fork? In the book, they talk about a special tool. I suppose this is a tool that is made to be inserted in the holes of the top ring?

Hi Like the look of OSSAs. Worried about reliability issues. Faults? Would I regret buying a 2012/13 ? Thanks Tony

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

Simple question on the rear brake assembly/chain tensioner. Can this be removed with the engine in or is it an engine out job?

Should there be a spacer on both sides of the front wheel? I have just undone the clamp bolts for the spindle and the shocks sprung away from each other.. Are they bent or am I missing a spacer? Pictures of the full set up would be great.

My OSSA MAR 250 has Harpowa (Kershan Bradford) reed valves fitted. Does any body know where I can get replacement blades (petals) for them (UK) ?

Hi. Are these still available? Am trying to find out the cost of the factory bike. Also, who has one and what's your opinion? 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.

Anyone thought of studding their tyres on their TR-series for some more serious winter fun? I have many frozen lakes around for sliding practice, plus my own garden to play, both are very icy and slippery during the winter. With stock trails tyres it's too much slipping, especially the front end. So I though studding the tyres. Anyone done this on a trails bike? I see many kits around - screw-in type of studs. I guess the problem is the rear since it's tubless (albeit tube can be fit there too I reckon).

Having a few problems with the ossa the bike started misfiring as if i was running out of fuel so i changed the plug and it made no difference the bike starts first kick and ticks over fine when you open the throttle it dies as if it not getting any fuel the fuel filter has been changed about 5 rides ago checked all the connections are fine .Hope its not the fuel pump anyone else had this problem

AS ON THE www.zonatrial.net website - "Ossa presents the TR 280 to the President of the Generalitat, Jos