bravo brother
i chekced there is a 10hp diff in G15a and m13a
also m13 is a bit more tuneable
btw change pads as brakes should be A1
well i gota say when ever my Altos F10a will feel weak or needed rebuild i will go for a swap
m13 or G15a
and tease all other 1000cc on roads
might even go for jdm 660 brake booster with abs
this is my plan with my alto when F10a gets weak