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Posted by: chico_2007

I'm bringing my 03 z400 in for repairs and upgrades...I'm planning on buying racing cams both intake and exhaust, a new front sprocket, K&N racing air filter and intake kit, and possibly buying a second hand Yoshimura full exhaust system. I'm just wondering if I should do other mods as well or if these upgrades are worth it or not. Would just like to hear on what other people think about these upgrades.

Posted by: Z-Rider86

It's not a bad start. If i could make a recomendation, I would say to get the DRZ springs and base gasket.

Posted by: jherbie28

440 kit wont hurt