TZR250 3MA
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Real situation (reed block, piston, crank)

Flow disturbing

Also the wide off the inlet port is discussable, marked green on cylinder

Made a start with shorten the legs

It certainly gives a better flow like this, but need to make a rounding inwards.

(First stage)
Shortened skirts like SUGO style, but grinded the flow towards the ports

(Second stage)
Enlarging the crank case inlet side, and trying to bending the flow a bid.

Compared with the stock configuration, looks like it is going the right way

(Third stage)
Decided to make it a bid larger then it was

Results both side's

Reed block will be placed 10mm outside to open the booster port.

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