well certainly the tracks are much longer and more fun to drive,
but if u've done your apprenticeship in karts at the Jurong track,
you'll develope a very high level of technical driving proficiency,
due to the extermely hard technical nature of the jurong
circuit.
i suppose, for rental karts at malaysian tracks, u gotta do a
search on the net, as i've never rented any b4, only brought my
kart down to some of the more well known circuits for practice runs
and races. Theres one called elite at KL, near Sepang, and one in
Johor, and another one in Kota Bahru.
oh by the way, i estimate the singapore rentals, driven properly
could prob hit about 70km/h at the entry to mobil corner in the
jurong circuit.