While street bikes have had fuel injection for ages, you might be surprised to know that all motocross machines were still making do with carburetors. Until now, that is. The 2008 Suzuki RM-Z450 has just been unveiled and the bike gets electronic fuel-injection – a first for motocross bikes!
The RM-Z450 weighs only 102 kilos and is powered by a liquid-cooled, four-stroke, single-cylinder, 449cc DOHC engine with Keihin EFI. Fully adjustable Showa suspension units are used front and rear – 47mm forks at the front and piggyback-reservoir shock at the back. The bike also has an aluminium fuel tank (instead of the usual plastic...) and the EFI unit is mounted at the bottom of this tank.
With the new EFI system, Suzuki claim better low- and mid-end power delivery and improved roll-on performance for the RM-Z450. Indeed, the bike marks the beginning of a new era in motocross engine technology – all other manufacturers are also sure to introduce EFI on their motocross bikes very soon...Also see:
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