Made from the highest quality chrome-silicon spring wire available today, these springs can easily handle the abuse of hotter cams and 125 Novice riders revving it out to 13,500 RPM in 2nd gear. The progressive design means no recognizable harmonic frequency within 13,000 RPM. Combined with titanium retainers and machined valve locks, your valve train will be moving less mass then with O.E.M. components. This will allow your bike to rev faster quicker and retain much more control over the valves.

Every kit contains:

• Four High Rev springs.
• Four Titanium retainers.
• Four sets of Machined Valve Locks.