21 - Aprilia RS 125 Tuning: SP 2018 - part 2 of 2

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[@JaapGrootveld]

When you measured the volume of the combustion chamber, you did not take into account the colloidal shape. There is air trapped in it. As a result, you end up with a higher compression ratio than there actually is. ;-)

[@NicFpv91]

very good video i can't wait how the engine is running if it runs good maybe i do the same to my Rotax 122

[@anttiala-tala2613]

The port timings sounds good.. can we see the engine performance results ?

[@christophbarthel6542]

Do you think the mitaka cylinder is a good alternative for the OEM Aprilia Zylinder ?