Hello, can someone tell how can I avoid the oil to come from the engine up to the tach wire?? The O´ring that goes in side that part it´s OK

There is an O-ring on the gear drive for the tach (part that goes into the head)
There is another on the cable where it twists onto the gear drive, it looks like a garden hose type rubber washer (but smaller)

That rubber washer that you talk about go inside the, lets call it nut???that keep the wire secure to the gear?????

Yes, the rubber in the "nut". But if that is the culprit, I would think that the oil would drip out right there. If the rubber washer is good, it should seal at hand tight. If it is not good, replace it. Don't do what i did. I grabbed the ole channel locks and gave it an extra little twist. Now it still drips occasionally and there is nothing that I can do about it because I squished the "nut" and now it wont come off

At this moment I don´t have that rubber wassher at all,, so I´ll have to make it, but yhe thing is that the oil goes up for the wire, so that washer must be very tight to the wire it self??? I mean a small hole to pass the wire??

I'm not sure that is the cause of your problem, but since the isn't a rubber washer there, it won't hurt to try. Oh ya, "cap" I think is the word we were looking for to describe the dohickie that we are calling the "nut"

Guys, look at this: xjbikes.com/Forums/vie...19538.html

The thing that looks like a "rubber garden hose washer" is actually an oil seal between the body and the gear stem. It's "buried" in the assembly so not readily seen. That seal (#4 in the diagram) is what fails.

Ya, thats it. A picture is better then a thousand inaccurate words. thanks bigfitz

Thanks to big again It couldn´t be more clear..
Now the million Dollar question. Where do I get those to pieces?????

Chacal has them, or probably any power sports shop. I would think that it is a pretty universal part

Not here where I live

OK it´s done and for the firts time I´m keeping the oil where it belong, inside the motor.
Thanks to all of you specially to not only big but great Fitz