Hey guys it's a long time i don't write some lines, i was abroad for a while in sydney and now i come back....
So i was using my bike as i did before and twoo days ago when i was in the highway i began to hear in 5 gear a bad bad noise of iron from the gear box and when i stopped i noticed that oil was spitting out from the oil breather......
Now only the first gear function and when the engine was on i was not able to change gearsit semms like blocked
i am very fear that i have tochange all the engine........
give me a suggestion please
lamps
Piero

Open the engine, that You know, what all went broken... surely quite alot!

Hi Piero,
you have to open the engine to see what happened.
I don't think you'll need to change the whole engine...
Probably, you only need to change some gear or some gearshift fork.
No matter, nobody can tell you something without seeing the damages into the engine.
Good luck !

Remove left engine cover and see if shift mechanism is OK.

begin with draining the oil.
If you want to remove the left cover, remember you'll need an extractor to pull the generator bearing off the crankshaft (the one under the small cover).
Per prima cosa, scarica l'oilo e vedi cosa c'è dentro.
Se vuoi togliere il carter sinistro, ti sreve un piccolo estrattore per sfilare il cuscinetto dell'alternatore dall'albero motore (quello sotto il coperchietto).

Did you tighten the chain??

Check the output shaft bearing that the front sprocket is mounted on. Wiggle the shaft to see if it moves. I blew up an output bearing and it had a similar type of feel.

It started out by popping out of gear and then wouldn't shift into gear. This all happened very quickly, within 2 miles. I thought I have broken the sprocket or chain at first.

I know it sounds crazy but did you check the fluid resevoir for the clutch???? I just experienced a problem with mine where it got low and one day it started doing the craziest things, clunking , clanging , lurching, jerking, horrible noised and I thought for sure the engine was toast. I spent several hours trying to figure out the problem before checking the clutch fluid. Of course I knew that wasnt the problem but I filled it and bled the system anyway and much to my suprise It was back to normal. With the symptoms it had I would never have thought in a million years that it could have been something that simple. good luck John

After all i am not able to change gears anymore.....
i don't have extractor but i removed the plugs and these are so so black and fukll of dirt dry oil
i am waiting for a friends of mine that have a little van, to go to a mechanic you know just in case.....
The hope was the last thing dying....
i'll give you notice
lamps
Piero

Piero,
as our friends told, you can try something more, before opening the engine.
So, if the engine would run well in neutral, could only be a clutch problem...

Piero,
come dicevano gli amici, potrebbe essere anche qualche altra cosa diversa da un problema al motore/cambio, così che potresti fare qualche altra verifica prima di provare ad aprire il motore.
Ad esempio, se il motore girasse bene in folle, potrebbe essere solo un problema di frizione...
In bocca al lupo