the first batch sold out and the second batch will be ready the 3rd week in January then after the second batch i should have them in stock and ready for shipping at all times. the demand was higher than expected so so it takes the first two batches to establish a production schedule. the  first batch is still on schedule to ship around xmas.
 
For Canadian orders shipping doesn’t include the current and constantly changing tariffs and duties. Returns will not be accepted for those who decide not to pay these fees.
 
Premium aftermarket two-stroke head with superior cooling design. Coolant path stays consistent all moto, and helps fight hot-spot detonation. Multiple dome options available to dial in exactly the power delivery you want, from tractor woods torque to screaming MX over-rev. One head, cooler running, better performance, your choice of feel. As an engine builder with years of experience I used this first hand experience with all the options available on the market to make what I consider an ideal cylinder head. The design prevents coolant short cycling. It has larger cooling passages. The head stay mount has been reinforced to prevent cracking. The outer dome diameter, thickness and support were improved for overall strength in stock, big bore and stroker crank applications.
 
What's included:
Outer top part of head.
One dome of your selection from the list of options. (Additional domes can be purchased separately in our store.)
Spare dome oring.
Cylinder head orings inner and outer.
copper Washers Qty 6
Printed instructions
A piece of solder to check squish
 
Dome Descriptions this covers stock and big bore descriptions. They have the same feel just a different amount of power between the bore sizes. Each domes described power delivery option can also be further fine tuned with basic ignition timing changes.
Enduro Soft - 87+ Octane very broad, heavy torque curve that starts extremely early and pulls like a tractor, but it is smooth and progressive, not snappy or peaky. This dome will have the least hit for casual riding and has the ability to run on low octane fuel for people that live remote areas and have fuel limitations.
Enduro Medium - 91+ Octane It feels strong and snappy right when you crack the throttle, with a big jump in torque very low in the rpm range. The power still comes on progressively and doesn’t get peaky or uncontrollable; it just arrives quicker and punches harder than the mellower Enduro Soft dome. This is the most well rounded off-road dome. Also not a bad option for Vet MX type riding for those looking for less hit out of an MX bike.
Enduro Hard - 91+ Octane a fast, heavy kick right off the bottom, stronger and quicker than the softer enduro heads. Torque builds sharply low down, stays thick through the mid range, and feels strong without being wild or peaky. Great for technical riders that like a hard hit or for those who ride high elevation requiring more power.
Moto Soft - 91+Octane motocross power delivery that hits a little more smoothly than the medium But has a good broad power delivery. For riders wanting good power thats less abrupt feeling.
Moto Medium - 91+ Octane MX dome crisp, strong mid-to-top surge that hits hard and carries massive over-rev. The powerband is similar stock but sharp, and aggressive like an mx dome should be.
Moto Hard - 93+ Octane SX dome power delivery like the MX dome but a slightly narrower harder hitting power band ideal for tighter tracks like SX or Arenacross.
100 - 100+ Octane Super-clean low-end snap, then a ferocious mid-to-top blast that hits harder and revs even higher than a standard MX dome. Razor-sharp, explosive powerband
110 - 110+ Octane Mid-to-top hit is violently hard and very peaky. Massive over-rev past where normal heads sign off
Blank - This dome is fully machined other that the squish/chamber area and left taller for builders that want to cut their own.
Custom - Please contact the shop for custom domes do not order then ask.