So that power to weight ratio restriction means all you 17yr olds with
cbt's that have derestricted your rg125, rs125, Mito, Planet, tzr125 or
nsr125 will still be riding illegaly even when you pass your A2. Same
goes if you restrict a rgv250/wolf, nsr250, kr1s, tzr250 or rs250 on an
A2. Plus these bikes do not like restriction at all.
When i passed my A2 i got an old Honda VT250 with 34bhp. luckily the
insurance company didn't ask for a certificate and it would top 100mph.
Then moved on to a CB500 that came with restrictors in a baggie. I put
them in and it went well up to 80 and could reach 100 on the motorway on
the flat but did struggle a bit 2 up. Unrestricted it was a good bike
and could out do most cars. Topped out about 120-125 but hit 131 2 up
downhill on the A303. Had that bike for maybe 5 years and loved it but
then someone had to crash their car in to the car behind me shunting
that one in to me. So i got another one. Anyway that got nicked about 4
months later and in desperation i got a tweaked up gsx-r750 srad cos it
was local and cheap. That was a shock.
My advice is the 400bros or one of the 500's. CB and GPZ are the best
from the range and can be found part or fully faired but ER and GS are
fine alternatives. Also fairings are expensive when you drop or crash a
bike. ZZR400, CBR400 ,ZXR400 or CB1 are aged but good bikes that can be
restricted. As said though 250 ninja is good if you got the cash. CBR250
a bit too low on power to me(the new one that is).
Truth is the UK bike market today is not suited to new riders and bikes
mostly jump from 125cc to 600cc to 1000cc although recently a few more
seem to be filling the 600-1000 gap. The 250cc is dominated by the ninja
but where are the 400's? Hopefully soon manufacturers will put back the
stepping stone because 33 - 75 or even 100+bhp is a big dangerous jump.