If your rider is asking for more power and you want to take the move to the next level this is a very nice kit. The BEGINNER SPEED KIT is exactly what it says it is. It is the next level for a beginner. It will allow you to upgrade on your own with out damaging the wallet.
This kit will typically help you gain 3-5 mph from stock speed.
Kit includes: Power Intake Kit which comes with an adjustable main jet to correct the lean fuel condition that 120’s have from the factory, a Velocity Stack to give the engine more air then the restrictive factory air box, the correct Governor Spring for more RPMs, a Rear Sprocket that works with your current stock chain, and a Master Link.