I m talking abt suzuki vxr car, its ignition coil s of 12volts, generaly stock 125 contain 6 volts coil, it ll result in increase current which ll reach the plug through plug cable, so cable should b capable of accepting bigger curent, so 4 tht purpose use silicon cable prefrably 0.9mm or 1.0mm whatever u find, nw came the plug, platinum plugs r nt racing plugs. They r generaly use 4 fuel economy, iridium plugs 4 performance, both thngs cant go parallel. Means u cant achieve performance n economy at same time. So use iridium plug bt my own experience tht thre ll b no significant change in economy jst a minimal.
Bro automobile mod s like a see-saw, one side up thn 2nd must b down, if u fit high flow airfilter, the sound ll b nt gud etc etc, if u go 4 economy thn thre ll less top speed. If u go 4 high speed u ve 2 sacrifice é fuel economy. Got it
but dont go 4 biger coil thn 12 volts. Because it ll burn ur harnace or cdi. I m using german bosch coil, its more reliable n contains trasistor so its beter as it help maintaining curent at optimum level. Bt its botle shaped so nt easy 2 fit in 125 clasic, as u knw i ve deluxe so it easily fited inside the litle holder