Hi ... bro Gary ...
I have did all this thing in my previous ride . It was wira 1.5 .
1 ) Air filter .
**** The stock air filter is covered with a air box and the hole for the air to flow into the filter is small . Change it to any brand that is affordable by you but choose a cone type . This will make your trottle body air sucction more and smooth . It will make your engine lighter when you rev up .
2 ) Exaust system .
**** Just change the stock bullet to twister type and your muffler . This will squecee the air out of yur engine smoothly . All these no need branded things . Just choose it according too your budget . Most improtant ..... DON"T EVER CHANGE THE PIPING SIZE >>> .
3 ) Spark plug cable .
**** You can change it too bigger size of cable but there will be no different if you just change the cable . If you want to change ... you have to add in a gadget ... the proper name for it , i have forgotton . It will act as a current booster to ur plug . At the same time you also need to change the plug to a higher amp .
BRO .. GarY ...
All these are just a info for you . MAybe i'm wrong , but i have done it b4 and i'm satisfied with it .
BE REMINDED !!!!!
This mod's won't increse the HP just abit improvent in the engines smoothness and pick up only .
GOOD LUCK