lineaway

I have been out setting sections for our next event. This thing does rev, but I doubt it breaks 10,000 rpm.Suprised someone has not checked there bike yet. Now I am curious. Next week I`ll have my boy bring his Beta 4T along and do a real world comparison. I am working during the day and camping out at our next trials site for the next two weeks. Should be interesting!

Now you are messing with EU law. Try annex 1 section 3.1 http://eur-lex.europa.eu/legal-content/EN/TXT/?uri=celex:32009L0078 And to think they now have self balancing motorcycles. That law should be on the books in a decade.

If the piston looks that bad, how about the main bearings. Have you checked the mains by grabbing the flywheel and giving a good tug yet.

Try a diagram from a TS250. Partzilla or some other site. There should be a hole on the end and the other end attaches to a small pin.

#19 sixteen is a washer. I would think it would be at the end of the arm. Not at the bolt.

It works fine, he is running it hard and he know`s it, Beta know`s it and they make the parts to make it rev more.

They come from the Factory very lean. We ride at over 7000 ft and up and the jetting comes pretty good. We just rode our western Nationals. The first event at 3300 ft and second event at 800 ft. We had 3 Beta 4T`s with us. A `15 with a full pipe, a `17 factory and a `17 std. Stock is a 122. We ended up at a 130 main with a 27.5 pilot. The mixture screw has quite a range of adjustment. Most people never jet these bikes as it is very difficult to get too. I have to rejett my son`s before we go back to our summer riding in the mountains. (Up to 10,000 ft).

Yes, I think you are right that you are hitting the limiter. Beta used to sell a race kit for the 4T. Cam, valves and a hotter ignition. Supposedly the Factory model has these. Talk to your Beta dealer/importer and see if it is available. I have ridden one with these mods and with higher compression, it was a monster of a bike. And the owner was one of our top riders. Very fun machine Good luck.

A 137 is pretty big, what pilot and elevation are you at. You have the complete Bosi exhaust?

The std exhaust does not breath very well. My son has an `15 with a header pipe and the factory exhaust. I would start with the a new muffle . What jets did you go to.?

The standard or the factory?

You should pull the slide apart and make sure the retaining clip/piece for the needle is correct. Also the needle could be damaged. Better find out now before another exciting ride.

Go ahead and get a rebuild kit for the M/C. But I would flush the system out before you do it. Also I agree with the Galfer`s. I just did my 2016 and the fluid was as black as night. All theses new M/C`s all seem to turn color fast.

USA Texas Nationals on April 1st. Just bought a 2016 Beta 250 Factory and installed a Dunlop 803GP. First loop came in and had about 1psi. Luckily I had brought a full gallon of Slime tire sealant.( This place is notorious for flats as everything is some type of thorn.) Second loop I finished with 2.5 PSI Better but not good on an 8 mile loop. 3rd loop same result and the green stuff was coming out at one spot on the bead/rim. Next morning I added another six ounces and it`s held ever since. I`ll worry about it again when I change tires.

I had one appear on my tank last year. I had used some ethanol gas for just a test ride and drained it. Months later a blister appeared. You just verified what I feared.

You need to tap the bolts a few times with a ball peen hammer or a punch. This will knock the threads loose. Better to use a socket type allan to remove.

Just buy a TL 125. ARMA sets easy sections anyways. Our Yamaha TY80 team could win any class they set.

Take it off and give it to someone in need.

The biggest Team at Texas. We still had a few riders missing.

Another view.

Dan might have the answer. There is a term some use and I can`t remember it. It`s like the death burble or something like that. The worst thing is Keihin does not sell the rubber parts to the tower. 2nd thing is soaking it in carb cleaner could make it even worse..

The best condition that you find, newer the better.

Wrap a little tape around it.

Probably someone that has played with mapping would know more. The factory usually showed n/a on any literature. We have 4 4rt`s at work and they really don`t rev real high as the stock unit is made to make the most torque at mid rpm.