OSSA

Hi everyone. I have no idea what I have got and would like some help. I have picked up an old Ossa in the UK. It has a frame number of B630024. Have trawled through the various frame identification lists Is it a TR77? Any help or advice very welcome. Regards

Has anyone fitted a tank breather to an OSSA TR80 cap? Thoughts and details appreciated.

Considering lowering the footrests on my OSSA MAR but what are the options for the brake pedal, has anyone any ideas please.

Seem to have developed a leak on my clutch master, fluid seems to be leaking from around the sight glass. Anyone else experienced this and any suggestions on a fix? I am not sure if they are a press fit or if there is a O ring or are they just glued in

Hi all I recently restored a TR77 that I got as a box of bits many years ago. It is now up and running (and road registered too!). When I first rode it, the clutch was SO heavy, and gear changing was very difficult without crashing and clonking them. I thought this was possibly just a clutch problem as it was so heavy. I took the clutch cover off and removed a plate - the outer metal clutch plate - to allow some adjustment, as the springs were already as far out as I could get them. This meant that the outer pressure plate ran on a friction plate (I ensured that it was flat and smooth first), and when I reassembled it all (again with the springs as far out as I…

The rear brake on my 280i is only any good if it is wet.Any ideas why this should be?

Hello can any 1 tell me the silencer on the TR77 250 dose it need the packing? I cant get into it dose it need to be cut open? I just want to make sure because its not my bike as am doing some work on it cheers.

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?

Hello, I'm a noob to the forum, having just bought an Explorer. It needs some work, nothing dramatic, just fork seals and wheel bearings... oh, and a cylinder head to replace the cracked original... all which are in-hand. I've not ridden it much yet, but already it's a bit obvious the suspension lacks refinement. What I'd really like to do is replace everything with the TR280i kit, but parts seem almost as elusive as rocking-horse poop. Is anyone breaking a TR or have a shock and forks they're willing to part with? Thanks in advance. Cheers... Paul

Hello everybody, Does anybody know where I can buy a Kickstarter for my 75 250 MAR in the UK? TIA Colin

Hi again.. I've not started the bike for a couple of days and now the kickstart is not moving.. I can literally stand on it And no movement..if I pull the clutch it goes full stroke.. also if I remove the plug so no compression And put it in second I can crank the bike forward on the kickstart.. any ideas please on what is going on? Stuck or damaged gearing

Does anyone have a source for 12mm x 1.5 mm male thread fuel tank petcock? I need one for my OSSA MAR. Thanks, Jim

After replacing the rear suspension arms on my 2012 bike due to the main pin snapping, I ordered some new swinging arm bolts as the heads where a bit chewed up, I've just come to replace them and the have both shered off at the end of the threads. I've looked at the shocker and the spring is only hand tight can anymore tell me what the measurement of the spring should be with the shocker off the bike from the factory. Once I get that sorted and tightened up will i be ok to use the Alu swinging arm bolts I've just got or should I look for some steel replacements ?

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

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

hI all does anyone know if you can buy aftermarket clamps for the ossa or very similar,If finding a decent second hand pair,mine have a bit of corrosion coming in them when I cleaned them so don't particularly want to use them. Many thanks

Hi just picked up a 1978 tr77 starts lovely and idles nicely BUT after a few minutes it will pick up the revs to almost maximum without any input without sounding dense where do i start?

Clinton and his tech Matt did a great job last week in Brantford.My Ossa was running like crap and they did a great job getting things back the way they should be.I was ready to give up on it and buy something else.Sure glad i didn't! it starts 1st kick now and with the setup done on it,it is much more rideable.Even the clutch drag is better now because the idle is set properly.

Hello good people. I bought my self a cheep defective Ossa. It is in a rather good shape, only inner head gasket is blown. After cranking it pops like a champagne when opening a radiator cap. Coolant that I have drained smells on gassoline. As I can see 4 side bolts will be the problem to torque with my Nm torque wrench because of a frame interference . Should I use some special tool , or release engine in front and pivot it a bit to make some clearance? One more thing. I read that inner oring is better to be silicone than NBR one, any oppinion on that? Many thanks !

What are gear ratios for a 5 speed 250 MAR? Thanks.