Even though a two-stroke single-cylinder engine
gives the best power-to-engine weight ratio, its biggest drawback is the poor
emissions control inherent in the engine’s design. Austrian maker of dirt-bikes
and other performance motorcycles, KTM, has unveiled a new two-stroke single
that it believes will revolutionise the off-road motorcycle world.
Designed to fit into its 2018 enduro bike, the KTM
EXC, the two-stroke, single-cylinder engine – developed in-house at KTM’s
Mattighofen R & D facility – will feature a new way of delivering fuel and
lubricant to the cylinder. Dubbed Transfer Port Injection (TPI), KTM claims
this new technology drastically reduces fuel consumption while eliminating the
need for pre-mix fuel or adjusting carburettor jetting.
The off-road bikes that will
receive the new two-stroke TPI engine are the 2018 KTM 250 EXC TPI and KTM 300
EXC TPI, which debut in May. In the USA
and Canada, the new 2018 KTM 250 XC-W TPI will be available in very limited
quantities in late fall. For Malaysia, the 2017 KTM motocross
range starts with the two-stroke 250 EXC Six Days, which retails for RM 8,160.
Next up are the four-stroke enduro 250 EXC-F and 250
EXC-F Six Days, which go for RM 41,870 and RM 45,050, respectively. The KTM 350
EXC-F and 350 EXC-F Six Days are priced at RM 42,400 and RM 45,580, while the 450
EXC-F at RM 42,930 and the 450 EXC-F Six Days at RM4 6,110 top out the range.
Also offered is the competition-only KTM 450 SX-F –
which omits lighting and other road legal equipment – at RM 39,750. All prices
include GST.
