lineaway

If the bike runs better on choke, then the problem should be the pilot circuit. There are two exists to this circuit. One under the slide and one in front of the slide. Spray contact cleaner into the pilot jet and you should get fluid out of both. The Keihin has got a known death barble. Find another carb to test with. Sometimes it may require a new carb.

All bikes are underpowered at elavation. That is why 300's are popular out west. You are on a UK forum, they pretty much ride at sea level. Even 125's run good there.

There is a main jet, like a 118. A choke jet like a 60 and I think the early 315 had two small pilot jets on top of each other in the same hole. Either way the pilot circuit has two other openings. One under the slide and one in front of the slide towards the engine. Spray something into the pilot jet and make sure it comes out of both holes. Also make sure the choke circuit in the bottom of the float bowl is clear. That is where the long jet with the oring sits. PS if it has two pilot jets, just go ahead and leave the bottom one out. Just leave the top pilot jet in the carb. Be careful taking these out.

The kick start seal can be replaced by just taking the kick start off. The seal will come off quite easily with a small pick. In fact most of the time the seal has pushed out and just needs re-seated. I would not worry about your other so called leak. Clean it all up and see what is really leaking. It could just be the carb dribbling or the crankcase vent is just spitting a little.

Gotta remember a 300 runs like a worn out 250 at elevation.

Yes, great point cleanorbust. I have seen a new bike power washed and not started, left to sit a couple of weeks and the main bearings rusted up.

My son plans to do the same this year. He currently rides a good running Beta 4T. He can`t wait to get a TRS. The TRS is much lighter and more power than you should need. You cannot beat the light weight of the two stroke in trials.

I have ridden Beta`s for years and still do not have a shifting issue. But I remember Beta Uk putting out a Bulletin about it in 2013. I also have a 2016 250 and I shift often while in the sections and have never missed a shift. But I do have a great working clutch due to custom springs I made. So the fact this was happening with a cold clutch could have some merit. Having to shift up two gears and back down would not always work for me. But if you watch enough video of the would round riders, they do this all the time.

Try a new condensor and file the points before trying anything else.

Well the Montesa is a better trail bike. Nuff said.

Look it up on Gas Gas website. Head or just insert, or maybe both.

If you are riding trials, it is pretty easy to stay flat free. Unlike where I ride has cactus an trees with three inch thorns. What causes flats on dirt bikes besides speed in your neck of the woods? Trials is not for everybody. Dirt bikes everybody thinks they are fast with a blip of the throttle. Trials everybody knows within a few minutes your real abilities. Worldwide trials is the smallest motorized sport. Sometimes it`s land issues, usually it cannot be found. Before the internet it was like some obscure cult. At 13 members it is an endangered species. Good luck with your new sport, maybe it is you that makes a difference!

It works, just has no feel. Since I have the factory it has the Braktechs and most have the Grimeca. They have always been (Beta) just not quite as good. Where Gas Gas rear brakes have always been great. I have ridden for several decades and then some. The Montesa rear is probably say the middle of the road, but there is like 6 different style pedals on the market.(Which at least gives the rider a choice.) This of course is my opinion, but I ride 4RT`s as much as my own bike. (We have 11 at work.) The Sherco is real close to working as good as the Gas Gas. Recently I threw my whole front brake system in my old parts pile and run a complete AJP system off a 2005 4RT. Not as strong a brake, but very consistent. (That really has nothing to do with Beta rear brake issue`s, just my issues.).To go back to the Beta rear, it locks up fine, just not much between on and off.

Will be interesting if Adam finishes out the final rounds. He had surgery on an elbow today.

My son just finished riding his first year on a Beta. We have talked before about the feel on his rear brake. Unfortunately I had to tell him the truth, Beta rear brakes have always been sub par. My Zero`s sucked, all my Techno`s were terrible, the Rev 3`s were better, but I hate the rear brake on my latest Evo. My son will be buying a TRS this year. I have always been a Beta guy. Maybe it`s the same shaped rear pedal?

It is a new rod kit if the big end is bad. Sure it will cost, but still cheaper than another bike. A Fresh 2 stroke is always good.

Don`t say where you are, but in our club the Beta runs better than the Montesa. There is a rev limiter on the bike. So if you are reving a new bike to the moon in neutral then it is you. They do come lean. Must be jetted and fitted with Jitsie thumb screw. My boys bike runs way better than the new Monts. By the way my employer has 11 4rt`s, all years and it drives him nuts we ride Beta`s. And yes, we ride new Cota`s every week.

If you have a pic of the piston before you removed it from the rod, you could tell.

That colored splatter looks like big end rod bearing. Grab the rod and feel for play.

You have filled up the lower end. Did you leave the petcock on? You can pull the plug out and kick it out, but hold the kill switch as it cojld start on fire. Once you think its clear hold ghe throttle wide open while starting. Make sure the exhaust is pointing away from anything you value.

Ryan Young has made two excellent videos that he sells.

Check the cabe at the top of the carb.

Being you both have the same experince. I tend to think you are pushing your you tube video numbers on this website. Good luck Sheepy on learning trials from someone that has not ever.

I was not going to say any more, but you keep going on. What knowledge do you have besides a camera and internet. Please tell us.

My son 2 weeks ago.