Got a few bits messed up there.
The 998 is a CG10
The CG13 is a 1275
The cg10's can get too 100 bhp with CG13 con rods and the 1litre pistons, this gives you high compression, on top of this the 1.3 inlet cam gives more low down power, although swapping both cams gives more power it just starts about 5-6k rpm.
The rev limiters can be removed, but that depends on if its been converted too carbs and the standard engines with standard internals will rev too 9k all day long.
I know far too much about small nissan engines haha.
My 1.0 with standard pistons and con rods, 1.3 cams, enlarged manifold, and a 1.6 throttle body was up too 70 from the standard 54.
With the 1.3 internals in it it should be pushing above 100 the and when i start fiddling with the injectors and the 2.0 throttle body i should be able too get close too 125. stupidly light engine aswell.
But again info you probably don't need too know if you've got your mind set on a honda lump.