Q. What is the difference between the sp abs and fi abs version ?

The SP ABS model has a carburetted intake while FI ABS model has a fuel injected intake. That means FI model would give better pick-up and better fuel efficiency than SP one. While the price difference is just about 10,000 bucks, FI is worth it. The only drawback is that there is no kick-start in FI model so if your battery runs out (which would hardly ever happen), you'll have to push-start or jump-start or get a new battery. Moreover, street-side mechanics would not be generally able to repair FI intakes. But I would still prefer FI model. Just keep in mind, the engine of Gixxer is not that durable. The bike looks good but I've ridden it enough to be certainly sure that the engine gives out pretty quickly. If looks don't matter to you that much, prefer an alternative brand of 150cc.

MEASURE DIFF. IS FUEL SYSTEM FI VERSION MEANS FUEL INJECTION SYSTEM INSTALL IN YOUR BIKE WHICH GIVE BETTER PERFORMANCE then sp abs .

Kick rod and carburator, FI variant you don't find these two elements., SP variant is carburator version where as FI is fuel injection version.