you mean SLEEVES not sleeps. btw - sleeves are the inserts installed to bring the bore size back to standard specs. the real name which is more understandable is cylinder.
The oil pump can be measured for wear and replaced/refaced accordingly. I myself spend a long time cleaning the cooling jackets till I see no corrosion or sludge, It really helps in regulating temperatures.
btw suzuki dealerships are complete lunatics in Pakistan - they never use anything as sophisticated as a torque wrench (torque limit ratchet) and use the worst machining facilities in the market.