OSSA

Can anyone point me in the right direction as to where I might be able to get an engine manual, would be great not to use a ipad

Hi What issues are there with the TRi 125? Starting? Injection? Glued-together frame? They don't seem to wear very well? They seem to be even less common than the bigger Ossa. Thanks

I heard a rumor at a trials meet last weekend that KTM may be having a look at buying OSSA, can anyone confirm? I'd sure like to see them stay alive.

Hi all, having some issues with my 250 gripper in the gearbox department. The problem is a loud cracking noise from within the crankcases and temporary loss of drive for a split second.This only happens when the motor is under load (climbing a hill) there are no problems when the bike is on the flat. Originally thought it might be the cush drive but that is all working perfectly. Any advice gladly accepted thanks Higgo.

Chris has just bought a Tr300i and wants to replace the Footpegs. We usually Use S3 Hard Rocks but they don't seem to fit and will not flip up due to the Fingers on the bottom of the rest. Talons look right but has anybody used anything else?

anyone managed to get a set of these diagnostic leads from Btwice yet? an if so, how are they, do they work as planned? Also, anyone have one of the Btwice adjustable throttle bodies, same question, how are they and do they work as planned?

My uncle has a 2011 ossa 280, the clutch is very heavy and really spoils the bike, i previously had the same year bike and mine was lovely and light, same as other bikes. Is there a way of lightening it, maybe removing a couple of springs?

After putting a new top end on my 2011,i had it setup at my local dealer.It ran great and started with 3 kicks cold and one when warm.During the setup and for a while after i ran 140/1.Being a bit nervous about the expensive new topend,i changed to 100/1.After a while it got tougher to start when warm.When cold it would start 1st kick,but needed 3 or 4 when hot. Changed back to 130/1 and it's back to 3 when cold and 1 when hot.No idea that this technology was so sensitive. Just an fyi for others.

Over the weekend the kick starter on my MAR shot craps and quit working. Pull the side cover off, kick start spring is intact and the shaft rotates freely. No metal in the oil. Just isn't making connection to turn the motor over. Thoughts? Can it be repaired without splitting the cases?

Hi again. Got part throttle fluffyness on 75 MAR250. Amal carb. Had it apart, done all needle heights, all possible air screw combinations, never right. Air screw fully in gives nice no throttle type torque. At full throttle all OK, just on part futtt splutter. Never stalls, always starts first time. No air leaks, although compression when kick starting seems a little easy. 50 to 1 synthetic. Thinking of a Mikuni carb from Inmotion. Any input appreciated. Thanks

Looking towards the winter, as the MAR has a bit of a false neutral thing going on: Who in the UK is the expert at engine teardown and re-build? Can deal with most of it but bit daunted by the shimming of gears etc as above. Thanks

can only find lower ones for sale is top the same ,are they a special or can you get them of shelf

Can anyone enlighten me as to the HP output of the Ossa 280i?

Hi, In the final stages of rebuilding my MAR and need some advice on magneto's. It is road registered however it only has the 3 wire ignition only magneto. Previously there was just a battery for the lights mounted on a homemade side panel. I am wanting to keep it original so had to do away with the battery. I have been looking for a magneto/alternator all over for a few weeks now with no success. Can anyone help and point me in the right direction? Pic attached to share Thanks Mark

Hi, got a nice MAR here, gears on right. I can see that the swap of the gear lever is simple. Any parts needed to put brake on right? Also appears to have two neutrals, one between 3 and 4 as well??? Many thanks

Just a curious question regarding shock mounting point size, I have just got hold of this project and just going over it to see what's what, and noticed the hangers for the shocks are quite big 15mm it's been powder coated by previous owner and looks like a collar has been left on all the mounts? Can anyone tell me what size they should be before curiosity gets the better of me

I've broken the original plug cap on my ossa, swapped to a normal ngk rubber one, does this make any difference, as the crap starting is even more crap!! Tried iridium plug and lithium battery, waste of time!! The button for the easy start might as well be effect only as it makes not a jot of difference. This bike is the boll@@ks but the starting is rank.... Ian

The story of this OSSA is posted up in introductions...I am in the process of bringing this back to life. Unfortunately gas was left in the tank for a very long time and when I pulled the Amal 627 off to rebuild it was filled with goo...I'm assuming resin from the Fiberglass tank? I cleaned everything in a dip type carb cleaner and it looked pretty good. I put it all back together and using an auxiliary fuel tank I turned the petcock on tickled the carb and gave it a few kicks. Nothing. I gave it a quick shot of starting fluid and she fired up but bogs badly when I roll the throttle on. It seems like it wants to run on full throttle but bogs from partial to mid throt…

Hi, can any Ossa experts shed some light on an easy way to remove rear wheel? i've done it but its a right pain. If you had to do it in the field it would be a right aggro!! Is there a mod or technique to use? By the way got it starting ace now with 12v li ion rechargeable battery now with switch on bars, result!! Ian

Hi there current OSSA Owners. I'm struggling with the decision to buy a little OSSA explorer...I test drove it, loved it, but have been advised by many against buying an OSSA. I'm trying to figure out how much of the negativity (i.e chews through gear box) is still lagging from the 2011/2012 issues and if folks that own newer (2013/2014) bikes still have problems. Truth is, if OSSA was still in business, I would possible even buy it with the transmission issue, I though it was one of the smoothest powered trials moto's I have been on (owned a Gas Gas 300, named the devil, a beta Rev 3 2003 and we also have a 2015 beta evo 200)....a bit difficult to start when …