:: Please take a look at my inlet
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eran_kTopic starter
Berichten: 52
Hi,
I opend the case for port matching and enlarging the inlet.
the stock inlet on my motor looks to be already bigeer (on the inside) then on many photos i saw here on the forums and in the how to guide, the diameter of the “round” part is 11.5mm
here is the picture

the question is:
how deep i need to drill with 13mm?
should i also enlarge the opening on the inside more? and how much?
thanks!
Eran
DocsDonateur
Berichten: 2680
You need to drill 18mm deep. Not more 😉
You don’t need to enlarge the inside of inlet. It’s big enough for you cylinder.
eran_kTopic starter
Berichten: 52
i didnt mention that all this work is for installing a 65cc kit on it
DocsDonateur
Berichten: 2680
Than the inside is still ok 😉
EdjuhBijdrager
Berichten: 6956
If you drill it to 13mm diameter and ‘flow’ the tube into the rectangle you’ll have a nice inlet.
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