78 Yamaha IT 250 E discussion forum:

RE: cpc

RE: cpc

gunny said 2010-05-26 08:34

The secondary port...what looks as if to be another spark plug port...is a compression port. Should you desire to have a compression release installed. This was common practice for having a comprtession release back in the 70´s. It was good for turns in tight places. Of course ..we are talking ..dirt racing/riding.

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