Not homologated on road, only reserved for the competition.
Here is a very large exhaust called YASUNI R4. One of the best pots for very large configurations. It will get all the power to your 80cc engine and more in long race or not.
This exhaust is delivered complete, with all the necessary assembly for each machine with DERBI Euro 1, 2 and 3 engine, with a very neat mounting, the fixing lugs are all adjustable. Aesthetic level and noise is enormously indescribable, the muffler gives a very nice fashionable look with its satin black, it must be tested to understand the expertise of YASUNI. The pot being very thin (8/10), the resonance is at the top, the high revs too, it is really necessary to put this exhaust on engines over-boosted and well adjusted.
Technically, this exhaust is realized in the following way :
- Steel sheet thickness 8 / 10th mm, laser cut
- Unit rolling of each cone
- Unitary welding of the seam of each cone by TIG welding
- Setting up each cone and pointing by TIG welding
- Welding of the pot by oxy-acethylene
- Each weld is tapped, so as not to have a weld bead inside the pot
These different devices allow this pot to have excellent acceleration, without compromising the length and high speeds! This exhaust is already much about him on meetings, competitions, runs, he is at the top at all levels.
With a very large configuration, this exhaust will develop a huge torque, an inexplicable recovery and high revs breathtaking.
