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"Shredder" 18cc Head

$59.99
Finish with 25/28.5 stainless valves, port and mill. Please spec how much you want milled in comments at check out.
Finish with 25/32mm valve combo, port and mill (please spec bore size of engine and how much milled)
Finish with 27/32mm valve combo, port and mill (Please spec bore size of engine and how much milled)
Thin lash caps (must for stainless valves)
Mill head (Dont use this option with finished heads)
In stock: 9 available
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"Shredder" 18cc Head

Product Details

This head comes as pictured as a bare casting with seats.

We can finish it for you for extra or send as shown. They are my favorite head for use with a 25/28.5 valve 5.5 mm stem combo (the seats need to be opened up a little for that) and a VM22 carb and flat mounting of the engine such as what's common on a mini bike. The chamber size is 18cc and the exhaust bolt pattern is just slightly wider than a standard clone/predator head but you can still use a standard pipe if you oblong the bolt holes. These are limited quantity

Note: the stock seats in this head are .975 +/- .010 (intake) and .845 +/- .010 (exhaust) ID even though they are supposed to be called 24/28 mm you will want to open them up some for the best flow. I like to run these at .885 - .890 exhaust id and 1.025 intake id for the standard 25/28.5 valve combo. Yes, the seats have plenty of material to make this possible.

For finished heads please allow 2 to 3 weeks to ship depending on workload at the time

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