lineaway

The white one looks like an 88 TY250?

You actually need to disassemble the forks to find the problem.

Has Bob talked about lightening the flywheel? Makes a world of difference, depending on how hard you plan on riding it.

That was the same problem with the Amal. The pilot would plug up quite easily.

Tony 27 is correct. No sense doing the top end and not the bottom end. There is a crank on e bay, but you still will need mains and seals.

Well the 2014 Ossa was supposed to have main bearing problems. Same factory, similar motors. No facts to back it up. Just here say. Almost all manufacturer`s have had similar issues. We had a 2015 sound that way and the importer made a strange trade as no `15s were available. I would just tear into it and fix it. it is now 2 years old. Some times it`s better to bite the bullet. Never understood why anyone would buy an Eco. Seen a friend do the same. Gas Gas die hard, more bikes than you and bought a eco. Not happy..

Take the fly wheel cover off and back the flywheel using a ratchet and socket.

There has been an issue with the pins in the connections sucking into the wiring harness and not making a good connection. Also the pins for the CDI. Just a thought.

With my ty`s I always used Bel Ray gear oil. That was long before I started using ATF. No problems. Can`t go wrong with yamalube.

No rings. chrome bore, no other sizes. You could do a sleeve, but would have special order the piston (have it made). Try Bob and see if he has any laying around.

Oh, it`s worth it. The cylinder and piston were the parts unavailable. So a little strange.

Nipped a piston and/or sheared a flywheel key.

Sounds like the slide is either in backwards or not closing all the way. I would not start it again until this is resolved. Good Luck.

It is just a vent, does not connect to anything. Back to the air filter oil. If you live in the UK (wet) you can get by with a spray. If you live in a very dusty climate the bottle of oil is best. Actually foam filter oil can be too thick for a trials bike, but in a dirty climate the whole filter must be oiled.

If starting is the problem buy a 250. I`ve recently went round and round with a gentleman that was a long time rider (older) with a knee replacement. Smaller is better.

Go easy on yourself. Everyone remembers themselves better than what they truly are. Come the third loop you will be glad you did. Worse that could happen is you move up next event. Myself I`m not that smart, I`ve ridden on and off for years. I think in the last four years I`ve finished maybe eight events in modern style. Many more in vintage. But next weekend I`ll be trying to beat my kid in expert!

This indexing is correct.

http://www.ebay.com/itm/18g-Castrol-Red-Rubber-Grease-Brake-Caliper-Fluid-Handy-MINI-TIN-/130679593752

I was wondering if you would comment.

It`s been awhile since my son had his. I want to say 11-48 and my 200 pound friends use a 54. http://advrider.com/index.php?threads/the-compleat-yamaha-ty80-thread.574301/

Thanks again Larry!

It`s been a long time. Check to see if there is a mark on the threads and actuator arm. Seems there was another piece inside that needed to be timed. Good luck.

Yamaha ty 80. Gear it down so the clutch does not matter. Hours of fun and you should not lose a dime.

World Champ, are you saying you have too much oil then to have a quick hook up. Could it be the oil?

That is true, but the same rider normally rides a Beta 4t. I have spent an afternoon on his bike. Anyone that has ever been on his bike will say that his suspension is the best feeling suspension they have ever felt. All stock. The motor on the other hand is very far from a stock machine. So correct set up is the key to getting the most out of your machine.