IS YOUR DIRT BIKE DIFFICULT TO KICK START?
This is a common problem with modern 4-stroke engines, and is often causted by reduced valve clearance resulting from valve recession (wear of the seating surface). This reduced valve clearance will also result in reduced power.
MX Engines has the solution, with our STAINLESS STEEL INTAKE VALVE KITS,
comprising:
2 x Stainless Steel Intake Valves - 2 x High-Rev Valve Springs
2 x Titanium Valve Retainers - 2 x Hardened Steel Base Washers

* Manufactured from 21-4N Stainless Steel machined one piece billet (not two piece welded construction), and with black Nitride coating to improve air flow.
* This creates a hardness which is higher than the stainless steel base material.
* The surface finish is smoother than with chromed stems, providing less friction between stem and guide.
* The valve seat surface is harder with the Nitride layer, making it longer lasting with lead free fuels, alcohols, nitro or other explosive mixtures. These valves match any kind of seat (nodular iron, steel powder metal, hard aluminium-copper or beryllium-copper).
* All of these features particularly suit higher rmp engines providing less power loss due to reduced internal engine friction. The black Nitride layer reduces power loss because of less valve guide friction.
* The Chrome-silicon performance springs provide better valve control at high rpm, and are essential when fitting a performance high lift cam.
This combination of high grade components ensures that your bike will run ritht and keep running right. The Stainless Steel Valves are harder than standard valves, resulting in less wear and longer life.
Kits are availabe for the following bikes:
CRF250 - CRF450 - RMZ250 - RMZ450 - KXF250 - KXF450 - YZF250 - YZF450
See our FREE FITTING OFFER
Please call us on - 0439 389 152
or complete the Enquiry Form
Dirt Bike Engine Repairs & Performance Improvement, Redlands, Capalaba, Brisbane, Queensland