Setting a Beta Trials Bike up for an Event Part 1
6 Video Views·Aug 22, 2025
Beta trials factory team rider; Jorge Casales, and his mechanic Simone Negri, demonstrate how to prepare a trials bike for an event. This video is part one of three of a short series, and talks in depth about setting up fork height, chain tension, rear wheel placement, and carburetor vent hoses on a Beta Evo 300 Factory 2-stroke trials bike.
This video also contains some really good footage of Jorge Casales competing at a few different events.
Why do you keep changing the fork?
This is a very personal question.
Depending on the terrain I'm going to ride or the race, I change the fork.
The fork changes in relation to the engine weight, the center of gravity.
If there is a lot of ascent, the engine needs to go below to have a low center of gravity and thus have more control.
If there is a river area that swallows a lot, the engine must go above, so the fork must go below.
And so I have more traction on the rear wheel and more sensitivity.
So let's check it out.
Yes, let's check it out.
As far as the setting of the chain is concerned, on the trial bike we will check it by putting a finger between the chain tensioner and the swingarm.
In this case, the finger does not pass, so the chain is too slow.
We have another verification by looking at the chain, which in this case is too soft.
So we're going to act on the knuckles to be able to pull it.
But we have to pay attention to the length of the wheel behind.
Depending on whether it is too long or too close, we have different reactions of the bike.
For dry terrain and with a lot of traction, usually the wheel goes inside, the closest to the swingarm.
And so we have a lot of reactivity and a lot of traction.
If the area is of water, a river for example, usually the wheel goes further back, further away from the swingarm.
So you have less reactivity of the bike, a quieter bike and also have more traction.
Finally, we have to check the carburetor blows.
On ours there are three blows.
The first is on the tank.
It is to let the gasoline out in case the pilot during the race makes various movements.
So too much gasoline comes in and you have to force it out of the carburetor.
This phenomenon is called too full.
The other two, on the other hand, are on the body of the carburetor.
They are used to get air.
It is very important to have these two clean.
Because if they get dirty while mud, the bike stops immediately.
Ok, here we are.
For me it's ok, try it.
For me it's perfect.
Great.