I write only for my brand......as normal.

in 1/8 on road the best is 14,5mm 9ports.
now I put on the market new engines,that is similar
at my old GIMAR r09 but have new light piston and little
changhe inside

in 1/10 class the new 11,9 engines have very very lot bottom power and
middle and good rpm

since 2 year that I create with JP new brand,step by step I do litle changhe to
have more power at low and middle and continue to develop all the trattment and tha accuraty that is inside JP company fro 20years.