OSSA

Well, for anyone interested, I have made considerable progress. I did get my bash plate / bolt up issue solved, at least until I bash it but for now seems to be goot-n-tight and as I mentioned in my previous post, I did put som neoprene rubber between the plate and engine cases to act as a vibration damper. Now there was one other thing I did but, not going to get into that on the grounds this it my make me look pretty stupid. At any rate after the addition of the neoprene the thing runs/sounds like a Rolex! It is so quite and smooth. I have to admit that I was astonished. It had been SO LOUD and buzzy before, easily give my CZ a run racket wise. Now it just purrs. So, …

Hi All, Might be scary that I'd have to ask this but, this is my first Ossa so... Anyway, can some please tell me where the transmission oil fill location is on a '72 MAR? The drain was pretty straight forward, I think...big plug on the bottom, right? Fill location is not so evident. I understand the volume is 800cc-1000cc. Thanks in advance, Shoe

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

I own 2014 Ossa explorer which I used it for difficult track trail riding. It has standard 10 tooth front sprocket. Do anybody know where I can get an 11 tooth front sprocket ?. Most mail order shop only stock 9 or 10 tooth. Or is it the same as some other bike brand ? Thanks

That's the rumor from a spanish guy at the thumpertalk trials forum. Says he got that from the local newspaper. http://www.thumpertalk.com/forum/showpost....mp;postcount=53 Pretty big news if true.

i herd earlier in the year there was 2013 ossa 125 is it real?

Any idea on how to pull the headlight out. Looks like 2 clips on each side and it'll slide out, but am concerned with snapping the clips and obviously never finding a replacement. Any hints, tips or tricks? When changing my AAA battery behind the headlight in that black box, I inadvertently pulled a little too hard, and the tiny little frail wires that connect the headlight pulled loose. Need to get in there with a soldering iron.

My OSSA dealer gave me both stock 5-degree and an "experimental" 15-degree butterfly along with Btwice throttle body. Looks really interesting: 15-degree butterfly is oval with angled edges and thus starts from more off-angle position and regulates the air flow in a more "progressive" fashion vs stock. I wonder with TPS having larger starting angle yet the engine gets less air (= theorethically richer mixture on low-rpms as it gets more rapidly leaner when opening up the throttle) if it improves bottom end delivery as well? Anyone has Btwice throttle body and experimented with a 15 degree butterfly? Is it worth experimenting with different custom EFI maps or i…

I have a 1970 ossa plonker/pennine.Does anyone have an idea of how many were sent to the united states ? I,m just curious if it was a rarity here.

Hello all, I am tring to get my father's 1970 Plonker going again. A litle background information. While riding it, the chain came off and jammed in the side case. Damage, a broken crankshaft and a gear(4th) in the transmission. Well, I had the engine repaired by someone who deals with Spanish bikes. Now, when I go to put the bike into first gear, it seems like it is going into 3rd gear. Seems as if this is the only gear I can get it into. I can not get first. Also, when I pull in the clutch, it makes a slight grinding noise at first and then stops. Anyone have an idea what is up? Thanks

Please inform me how to add crankcase oil and how do I check the oil level? Thanks.

Hi all. I have looked at an Ossa 250 today. The bike is in superb condition. New ally tank, new hand controls, grips, cables. Original seat, akront rims and ally mudguards. New front and nearly new rear. Runs perfectly. Whats the value please? Many thanks

Hey guys, this is my first time posting so bear with me. Here recently i got a 1972 OSSA mick andrews replica. i’m pretty new to fixing old bikes so i need some help with these wires on the bike. Does anybody know what their purpose is and where they plug into? Also where is a good place to find an replacement ignition coil. ignition coil for the bike? thanks.

Hi guys, I have a six days replica that i found buried in a barn. After checking the stator, im not sure if i am getting good readings. From blue to ground, and black to ground, i am getting nearly 35 M ohms. Also, could any one tell me the correct size puller to remove the flywheel? Thanks.

Could anyone tell me if a stator from a 1973 175 will fit a 1972 250?

I have taken the time to search and read about these bikes. I recently acquired a 1973 MAR and was wondering if the center exhaust section contains or contained at one point packing material, or is it baffled, or simply a small expansion chamber? I ask on account of wanting to clean it off carbon deposits internally and externally prep it for paint.

Hi Guys I am rebuilding my OSSA. It never had a rear brake cable when I got it. I have the rear brake cable with the nipple one end and adjuster thread the other. I seem to be missing some parts like a 9mm barrel for the thread to pass through and a nut for adjustment. Can anybody advise? See attached pictures for frame and hub cable fitting points. Thanks Gordy

A riding partner of mine has acquired a pristine condition 250 Gripper and it appears to be near museum quality. Lucky him! He's unsure about a couple of things, however. He wants the bike to be as close to original as possible. He's seen photos of 81 250's with either orange or unpainted bars. Same for the chain guard. Both his bars and guard are unpainted. Did a mid year production switch happen? Also. the stock shocks are Telesco brand. Are those stock and are they rebuildable? Thanks for any advice, info, or guidance.

I've rebuilt the motor and was surprised to see such a large counter weight / flywheel on the cush drive. My 1972 Mar 250 has no counter weight. Any one experimented with removing or reducing this extra weight? Looking at it it almost strikes me that it's a factory add on for those who wanted to tame the bike in the day? bike runs fine, just looking to put a bit of snap into it. this seems to be an obvious but need to get a little insight first. cheers

Looking for tips and tricks for 2010-2015 Ossa TR’s. I just bought a 2015 TR250I and am in the process of going through it, replacing worn out parts. Thanks to a local parts supplier, so far it’s going pretty good. Biggest issue I’ve ran into was the silencer had a broken bolt stuck in the aluminum and a broken bracket on top for a clip type nut.