You're looking for a service manual for the Suzuki Gixxer SF 250. Here's some verified content to help you with that:

, covering engine mechanicals, fuel systems, and chassis data. Philippine Version Owner's Manual

Service steps for the telescopic front forks, rear monoshock, and dual-channel ABS braking system.

Intervals for oil changes, air filter cleaning, and spark plug inspection (typically every 4,000–5,000 km after the first service).

successfully perform their own oil and filter changes using a #14 spanner for the drain bolt and a #10 box spanner for the oil filter cap. wiring diagram from the manual? Gixxer SF 250 Service Manual | PDF - Scribd