Frequent asked questions about JCosta's products

Important recommendations
  • Never grease the bushing, always remove all grease residues before mounting the J.Costa variator.

  • Never remove the washers that come with the original variator.

  • Tighten the crankshaft nut to the torque recommended by the vehicle manufacturer, always using a torque wrench and never a pneumatic gun.

  • For the Honda 125/150 always fit the 150cc injection belt.

  • The belt must always be the original belt or, failing that, the J.Costa belt.

  • Always use the original or JCosta rear pulley, spring and clutch.  

  • If the kit contains a bushing, this must replace the original one, otherwise the original one must be mounted.

  • If the kit contains a washer it must be mounted between the bellhousing and the crankshaft.

It is essential that the speed variator is correctly maintained to guarantee.

The body of the speed variator, assembled in an official J.Costa workshop, and with the correct maintenance has a two-year warranty, the other components of the speed variator, i.e. the bushing, bushing, bell and masses, are considered consumables and must be replaced at the end of their life. In order to avoid breakdowns, we recommend that the speed variator is always assembled in an authorized workshop or distributor to guarantee its correct assembly. taller o distribuido autorizado para poder garantizar un correcto montaje del mismo.

  • It is recommended that every time the oil is changed, the variator is also checked to check the masses, bushing and bushing, as well as the belt.

  • It is necessary to change the masses when the user feels that the engine turns at high revolutions and does not drive.

  • If the clearance between the bushing and the central bushing is greater than 0.2mm, the bushing must be replaced for perfect operation of the drive.

Depending on the type of driving and physical conditions (weight or temperature), consumables can be affected differently in terms of their durability.

Consultar las recomendaciones de mantenimiento

  • Increased acceleration

  • Higher average speeds

  • Higher top speed

  • Better recovery

  • More power at the wheel

  • Less vibrations.

The design of the bellhousing and the masses that slide over it, allows to modify the transmission ratio or gears of our motorcycle:

  • We have a shorter first gear at low revs (better acceleration).

  • We have a longer sixth gear when the variator is fully open (closed pulley).

  • Power at the wheel is increased at all engine speeds, especially in the low and mid-range, allowing great acceleration.  This happens because we are able to drive the engine always in the maximum torque range.

With the traditional variator, you can hear the typical chime of the rollers hitting the ramp. With the J.Costa Variator the motor becomes nicer, smoother and quieter.
  • The absence of internal friction in the J.Costa variator allows a better throttle feel and a better response compared to the traditional variator.
  • As there is no physical contact between the bell and the variator, it allows the pulley to react immediately when opening or closing the gas control.
  • In the traditional variator, the movement of the bell is mechanically guided, so the friction is higher and negatively influences the response of the system.
  • Because the J.Costa Variator is the only variator on the market that allows you to increase performance throughout the engine's power range.
  • With the traditional system if you need more acceleration you have to lower the weight of the rollers. This means that you always need more engine revolutions to start moving and you lose top speed.
  • With the J.Costa Variator you will always have better accelerations without depending on the opening of the throttle grip.
  • With the J.Costa Variator you never lose top speed.

On Yamaha T-Max, before loosening the variator nut, the crankcase cover must be removed. Once the cover has been removed, loosen the nut and replace the original variator with the J.Costa. Place the spacer and tighten the nut to 160Nm, locking the variator with the Yamaha tool or the JCosta tool. Replace the crankcase cover to finish the process.

If performance is increased, will the engine suffer damage?
No, because we do not modify the engine at all, we are simply able to transmit the power to the wheel better. In any case, all engines have ignition cut-off and/or injection cut-off that protects them in case of over-revving. For this case we have a ceramic additive that put in the crankcase and transmission reduces friction, increasing engine smoothness and reducing wear.

Can I mount the speed variator myself?

No, it is always recommended to have the drive installed by a specialized workshop, as it is essential to respect the torque recommended by the motor manufacturer.