Groove in new Cylinder - Pocket Bike Forum - Mini Bikes
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post #1 of 3 (permalink) Old 06-29-2005 Thread Starter
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Groove in new Cylinder

I have just opened up a brand new 50 cc cylinder and noticed that there is a groove running up from the exhaust port. It is approximately 1mm deep by 3mm wide and runs about 10mm up the cylinder. I have never seen this on a two stroke cylinder before, is it supposed to be there or is it a bodgy cylinder?. I would have thought that a grove like this would allow the hot combustion gases to jet down past the rings and cause a lot of damage. The groove looks to be designed into it.

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post #2 of 3 (permalink) Old 08-09-2005 Thread Starter
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Gee you guys must be a knowledgable bunch, I would have thought that by now someone would have been able to tell me what this groove is there for. Am I the only one to have this.
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post #3 of 3 (permalink) Old 08-09-2005
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ive seen this before but on a cag aftermarket 2pc headkit.
all motor cag racer is offline  

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