Old car , low milage maintenance

Hello,

Just bought a 1999 GSR with 60k milage (legit since kilala ko may ari).

the story, regular ang change oil every 5k , spark plugs are changed last 2010.

for sure : balak ko na mag palit ng timing belt (tama naman po diba).

wondering : spark plugs since kakapalit lang so 50/50 ako


ano pa po ba mga sir ang magandang ipa check ? or palitan ?