bosch

Was doing a little research and I am finding discrepancies about which F.I. system our bikes have. Most articles I have read state that our bikes are using a Dellorto system. However on the KTM Moto America page they state that a Bosch system is used. I'm curious if the cup bikes are using a...

Hello everyone. I'm looking for higer performance spark plug. Could anyone give me advice? Thanks. Has anyone tried Bosch ZR5TPP33S? Can it fit on RC390? Personally, I prefer to use Bosch Spark Plug though it's hard to get in Taiwan. Hope someone could give me advice, thx.