Join Date: Feb 2012
Location: coogee beach australia
Thanked 1,290 Times in 797 Posts
stepho - depends on gear ratios of the vehicle
with other factors such as run speed and road slope
also effecting the process.. a four speed gearbox
motorcycle or car [say] may be more suited for 1st
gear with its ratio being closer to cbr250r 2nd gear..
you want the engine revolving as quickly as possible
in the short time its being clutch started, without
a high 1st gear ratio working against, the engine revs..
just like changing down from high speed to lower gears
may result in locking the rear wheel, similar effect may
happen when dropping the clutch in 1st..
of course its possible to clutch start in 1st,
or in any gear probably, but 2nd on cbr250r
gives the engine a good shot at turning fast enough
and for long enough to allow the engine to fire up..
ratios are a factor, along with slope and run speed..
i used 2nd because ive clutch started other hondas
using 2nd, so used the familiar process here as well..
no doubt on a long sloping runup you could use 3rd..
starting your car is different in that it has heaps more
mass/weight to keep its momentum going once
moving well, plus it will have a certain gear ratio
which is not likely to be as 'high' as cbr250r 1st..
clutch starting is obviously second choice for starting,
but many people have clutch started many vehicles
without causing obvious damage to their vehicles..
[i had a vw 1600 superbug which ate batteries
but otherwise was a very motorcycle-like car
which i clutch started many times similar to
a motorcycle, runup in neutral, holding steering
wheel and open door, jump in, into 2nd, clutch out,
and bobs your uncle]
there are probably fine degrees of 'better'
but no need to worry about it being "bad"