Quote:
Originally Posted by GGian
Gibnut, do you have any pics of the stock head? Ive just picked up my EC250GP and am happy with how it runs, but I do know how good the TSP head mod is after getting it done on my past few bikes.
Anyone had the squish measured on a '18 250GP?
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Before & after, squish 2.25mm stock, 1.35mm now.
Jake, your compression will be in the mid-high 15?s if you shave a mm off and do nothing else. Ping & run-on almost guaranteed.