OSSA

Hi, Thinking of fitting a PWK 28mm on the old Gripper. A common mod by all accounts, however I’m struggling to find the basic start jetting for these carbs. Does anyone know and willing to share? I have an 28mm OKO already but I guess it’ll need jets/ slide/ needle to suit the gripper. TIA Brent

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 !

I have a Caswell-lined fibreglass tank and wondering if I should, or need to, remove fuel mix while storing over the winter (Canadian) and if so, should I replace it with something or okay to leave empty. For my street bikes I just top up tank and add a bit of stabilizer. I asked my neighbour who owns a boat and he says it should be fine if it's treated/lined as it protects from ethanol. Thanks in advance.

I seem to remember reading posts here about someone that could rewind a stator for better starting? Was that fella in the USA and if so what was his contact info? Thanks.

Hi, I have decided to sell my OSSA tr280i it's in fantastic condition and is keep in my house on display please have a good look at the photos you will not find a better example. £2000. The bike is still available for sale my number is 07776105321

Need a new throttle assembly, anyone experiment with the Domino fast vs. slow on an OSSA MAR 250?

Went to start my 350 TR 77 after a carburettor rebuild And because of a recent injury I can't kickstart it so I used a roller starter I noticed that the bike was backfiring on start up and wouldn't run .It was then I noticed that some of the back fire was between the head and the barrel so it definitely looks likely the head gasket is fubar.. sorry for the long post but how easy is it to fit a New gasket And is there anything that I should be aware of?? Many thanks Phil B

Hi all I guess this has been asked before I love the green colour of my Tr77 however the side panels are in pretty poor condition so I was thinking about replacing with pattern part's any help on the nearest to factory green would be appreciated, I'm leaving the tank as it's got some nice age related marks And the plan is just to clean it And then clear coat.. Cheers

Hi Folks! My Explorer ran out of fuel on a 10mile road trip at about 45mph. After hearing a strange sound I immediately pulled the clutch and the engine stopped. After refueling I noticed that compression is lower than it was before but still present. I am worried that the piston seized as the engine doesn't start any more. Any ideas what I can look at before I start dismantling the whole engine? Thanks! Felix

Anyone used the nibbi carb as a replacement..? The Amal MK2 2627 on my TR77 needs a complete rebuild including a New slide. I can buy the nibbi And a selection of jets cheaper 🤦‍♂️ do I replace or rebuild

Hi all my ossa 350 has an Amal MK2 2627 carburettor fitted I want to buy a rebuild kit so does anyone have an idea on what jets, needle, And needle setting,and slide I need please,(slide is very worn)

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

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?

Hi, does anyone have one of these bar pads they will sell

Hello people, I'm tidying up a few wiring issues inherited from previous owners and I've hit an issue without an obvious solution. Can anyone tell me what the MIL wire from PIN22 on the ECU is supposed to do? It's currently connected in a very nonsensical way and I'd like to understand how it should be connected. Does anyone have specific knowledge? I've a loom with the six pin diagnostics connector and the easystart system if it helps. Failing that, does anyone know what happens to pin 22 in the cases of a fault and no fault? Thanks in advance. Cheers... Paul

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

Should the head and barrel be black and if so gloss or matt?

Hello All, Recently rebuilt my engine, but I can't find neutral. Can change through the box using the kick-start, but it's always in gear. Any ideas? Thanks.

Hi, I've just registered on the site. I have been replacing the fuel pump on my TR 280i and found a few helpful posts here. I was wondering if anyone knows where i can find an Explorer conversion kit. By the way I found the fuel pumps from the KTM 690 Duke's look identical and are relatively cheaper..

Hi, does anyone know where I can get the k-scan software and lead for my Ossa TR280i.