lineaway

Yes, my son actually rides a Beta 300 4T. When he was ten years old he was over 5 foot and growing fast. I made my own peg mounts and used tall ATV bars. We sold his bike and soon the new owner realized an adult could actually ride that TY 80. We now have around 10 guys riding the TY80 class just for fun.

The 4T does not require much attention other than oil changes and carb work. Over thinking ownership, go ride it more.

I saw a rider in the GP class with back protection. He had a terrible crash in the section I was scoring at Kingman. Too bad the foot peg hit his kidneys two inches away from his protector. I was relieved when he got up and walked out of the section. PS I have become more comfortable with the wrist strap. It has saved my bike once in the six months of use. It also has caused me to almost crash in 6th gear twice while attempting to scratch my nose.

The ty80 can be made to fit with custom peg mounts, taller bars. We actually have a ty80 class in our vintage series. This is my 6 foot 4 inch tall boy.

Since this was re-kindled, the FIM has two more rules coming. Face guards and they have to be approved and back protection. Before long we will have air bags.

Blowing air through a Keihin can kill it. Who ever originally thought blowing compressed air through small passageways was helpful was an idiot. Now everyone thinks this is normal. I hope you find you have done something else and it again runs great. Otherwise there is hope. There is a tower inside the body that can be removed. It`s held in place with security screws. This allows further access to the other passages. Trouble is you cannot buy the o ring type seal that seals the tower, so be careful. Good luck.

Are you sure it is not the 80?

That is like going backwards. Would need new manifold and air box boot. Throttle cable too.

Bent rotor?

Most likely the suspension is sacked out.

If it will not run unless the choke is on, the first thing would be a good carb clean. Secondly you need to check the fluid flows from the petcock and that the tank is actually clean inside.

Bent rotor, loose front axle, air in the system.

Or a poor way of explaining a real burnt clutch.

16 plug 15 ignition coil 13 voltage regulator 12 generator 11 ignition unit 10 fan control 9 thermometric switch 8 fan 3 connectors 1-7 just lights 14 lights power supply

Sure it does increase flow, but they have had bikes suffering vapor lock for no apparent reason. I would guess this is a remedy for those few cases.

You will get more response posting in the Aprilia section.

Seal the inside with epoxy and Jb weld the outside, sand and paint. Twenty bucks and two hours work.

You all are thinking two stroke problems. This whole thing is probably the fuel pump/vacuum lines issue along with vapor lock from a hot motor. Damn Sherco with the remote tank anyways. I was sure happy the day we sold my boys 2012.

Could be something simple like the detent for the shift drum, missing, loose or broken spring. I would not even worry about the case. A sight glass is not needed.

I love that Pro keeps a going. Probably has some of the most hours of any Pro. Keep making it better zippy.

I gave you specs for what we ran at the nationals. Which is your elevation.

What jets have you tried. I told you what we used at the Nationals. Did you get a fuel screw or did Ron install it when new?

You could also shift to second more often. With the 11 it runs good, but makes 2nd not as useable. I tried the 11 this last week as I am searching for just the right combo myself. Trouble is we ride tight very large steep rocks at high elevation. (Thirty feet tall plus) I know completely different terrain, but I also just switched from a Gasser. The Beta first gear has always been too low. Good luck.

1976

http://www.r2wtrials.co.uk/html_files/betacarbsetup.html