OSSA

Hey mods, can delete if not allowed. As Lotus54 knows, I recently cooked my Explorer ECU through pin 3. No damage to the harness, the plug is cooked, but that can be replaced. So I'm wondering, as I hunt around for options, if anyone, anywhere, has a known working ECU (or 2) they are willing to sell. It is the 520030211 unit, but I'll take whatever ya got at this point. My only other option(s) at this point is to sell the bike for parts (not what I'd like), or to install a standalone ECU, which, if I can't find a factory unit, is the route I'll likely go down. Post in the thread or send me a message on here if ya have anything! Cheers!

One problem after another. The bike keeps fighting me me all the way. I noticed that the screw on the throttle body for the TPS has come loose so carefully screwed it back in but hay ho the thread has stripped so now have to rethread the plastic which has now been done. Doing this i had to remove the switch unit and have no lost the correct position so now have to get it to someone who can reset it. Looking at removing the air filter the air box is really dirty and looking down the throttle body that too is dirty with what looks like sooty deposits on the butterfly so have to clean that as well. How is the airbox removed as everything is so compact. Thank.

The 2015 Explorer I recently got was worked on by someone that should not be allowed anywhere near one of these- heck any bike at all. Due to some issues from previous wrong assembly etc, I wanted to pull gearbox. There are very small screws with a 3mm allen. Why so small, I have no idea. They are plenty big for a much larger head. Anyway, one of them had the allen stripped by the person, another the allen wrench broken off. Fortunately, I came across this before and the fix was easy. I found some small mounted stones that I could use with my Foredom dental handpiece. I connected up a vacuum to get away as much grit as I could, and made an opening in the clutch hub…

Hello to who ever reads this. As title above i have just fitted one of these clutches to my bike and though has any one used the 1 2 3 adjustment on these. I have just used number one and fitted the cover and before i fill up with new oil wondered about these adjustments. Having to drain the new oil and take off the cover and then have a chance of damaging the gasket for no gain is a no no ergo why i thought i would ask on here. Thank you.

2015 Explorer. I’ve seen several Explorers that had the rear fender mount areas broken- there the huge handrail is mounted. I take those off anyway, since they get in the way when getting weight wayback. So I designed some bushings that will fill the broken sections and press against good part of the fender. This allows easy firm mounting of fender without grabrail, especially if the parts are broken.

2015 TR300i Recently purchased this bike and had a hard time starting it. Fuel pump was suspect and was the problem. After replacement the bike fired up and ran perfectly for 10 minutes - until it stopped. No spark, tried different plugs - nothing. Do these bikes have a weakness in the spark creation department ? Anything come to mind after an engine removal but ran for 10 min after install ? Not enough time with this bike to know what the go-to's are. Everything seems to be plugged in and secure. Pulled a coil off another dirt bike but still no spark. Blue/black wire to coil does show a voltage signal on a digital meter when moving the kick starter.

I think I'm the proud new owner of a 2015 TR 300i.... but it won't start sometimes. The bike came with a 9v battery. I was instructed to push the button prior to kicking. Didn't take long to realize the 9v doesn't activate the fuel pump so I put a little 12v in. Pump runs and logs 21 psi - max. Just kicking the bike I can get to 21 psi after 3 kicks. Right..... what's the pressure with the engine running ? Don't know - the barb off the fuel injector housing broke while I was carefully trying to disconnect the fuel line to check pressure. Two questions... Anyone know where I can get the replacement housing with the barb and 2). Has anyone defined a minimum amount o…

I have a 1974 MAR 250 with standard Motoplat stator (red. No battery) How do I wire the lights? I have Red, Green, White, Blue, and black wires. Sid

Just bought a 2014 TR280i with an explorer conversion kit 1) how do you connect the explorer tank to fuel system 2) does anyone have the part number for the easy start system as the one supplied doesn’t look correct ? thanks

My ossa runs fine on trial and enduro sections but overheats on any short road sections ? Fan seems to be working and head seems ok ? Any ideas ?

Hi, Anyone have a wiring diagram for TR77? Looking for information on the magneto wires, I have 4: Black - Ignition Yellow - ? Green - ? Pink - ? I am assuming one is for the horn, one for lights and one for brake light. Carl.

Hello all, Please excuse my "butchery" but I managed to simply remove the splined bush off the crankshaft by turning an aluminium dolly to fit inside and then gently heating up the bush with a plumbers blowtorch and then hitting dolly to remove. Looked online and there's all sorts of special tools but this work a treat.

Hi all I’ve just picked up an Ossa 300 - 2014. It’s got the updated battery pack helper on the front end with the AAA battery it’s got a decent spark, but it just won’t start i cannot hear the fuel pump at all, ive cleaned the injector and tested that with a 9V battery and it’s working fine when are you meant to hear the pump prime? First/second kick? I have the fuel line off the injector and nothing is coming out

Just purchased a 73 SDR and would and like the specs and capacity information. How can I get a copy of an owners manual?

I wanted to ask if any of you know if parts from the original Marzocchi 40 mm fit into the Ossa Explorer Ollé Fornt Forks?

From the backgound of enduro and loads of oilchanges I thougt that a simple fork oilservice would be a pice of cake, but no! Read some helpful information but not realy a complete explination. So, went for the classic counted the clicks to max, back to fully release pressure at minus and then loosen the cap. (Drained the oil from the lowest bolt first). Did all the refilling and air bleeding but when mounting the cap, with the unusal rod stuck to the cap this drives the rod to bottom?!! Leaving no chance of changing the clicks? Do I have to mount cap/rod at max + so that I later can loosen the compression nut to right set of clicks? And what is the standard set of c…

Just added a section to my website on identifying model years based on VIN and motor number. See it here: https://www.ossa-efi.com/home/factory-documentation/model-year-identification I would love to gather more examples, and possibly even create a registry of where bikes are roughly located. If you don't want to share your complete VIN, even the 10th character would be helpful. Likewise for the motor number, the two characters after the "I" would be helpful. I'm especially interested in finding examples from 2015. Feel free to contact me by PM.

2015 Explorer I need to replace the clutch fixer shaft and bearing. I removed circlip and I assume after heating the case, it should just tap out- bearing and shaft? It did not come out easily tapping from other side, so thought I would ask before trying again, perhaps with a slide hammer.

I've made a new addition to my OSSA (2104 Explorer) The AAA Rechargeable batt (inside the factory Easystart) gave me some issues on a ride, so I hooked up LiPo battery and it worked great. But I didn't want to leave it in all the time, so I installed a KTM style start button. Wired it so the LiPo battery could apply power to the Diagnostics port. This runs the fuel pump for a moment and 'wakes up' the ECU. The bike starts first kick cold or hot. The LiPo battery is quite small. I'll get some pics etc. working on getting more connectors, but just used the 'dummy' plug with some appropriate pins. Mark

Anyone know where the dust shields are obtainable, i have seen them as part of a kit from the USA, but can’t find them anywhere in the uk?