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"Shredder" 18cc Head
"Shredder" 18cc Head
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