07 Suzuki Dirt Bikes ReviewedLeading the way for the 07 Suzuki dirt bikes, the RMZ450 has had a number of changes for '07, these include a higher final drive ratio, up to 49/14 from 48/14. In the motor/gearbox department there's new shift fork guide pins for better gear shift feel and also a different cylinder head and piston ring design. Out back the RMZ gets a new swingarm and revised front and rear suspension settings to improve traction, cornering and straight line stability. There's also a new rear brake caliper for improved stopping power and feel, I ride an '06 RMZ450 and one of the very few complaints I have with the bike is that the rear brake can be a bit vague making it easy to lock under braking.
RMZ250 The RMZ250 for '07 is all new and all Suzuki. The bike has a twin spar aluminium alloy perimeter frame and is suspended front and rear with Showa suspension. The 249cc DOHC motor has all sorts of technology including a dual map igniton which automatically increases the idle speed to overcome the effects of engine braking. The 250 has a 5 speed transmission compared to the 450's four speed and uses a semi-dry sump system that utilises the transmission as an oil sump, allowing a crank design that keeps the motor's centre of gravity as low as possible. The bike comes with Renthal bars as standard and a Kevlar front brake line for improved feel. RM250/125 In the two stroke department of the 07 Suzuki dirt bikes, the RM250 has a swag of engine updates including improvements in the exhaust valve timing and components, a re-designed, more durable clutch and a revised igniton map for improved bottom end response.
The RM125 has improvements to the reed valve intake passage and air guide designed to improve the motor's bottom end response and power output. There's a new CDI ignition map, again for improved bottom end response and the motor has a reshaped exhaust chamber for increased torque right through the rev range. The 250 has a new frame with lower engine brackets and a head pipe postion that's been moved more to the rear to help with the bikes straight line stability. Both bikes have Renthal taper bars that are rubber mounted on re-designed handlebar mounts to reduce vibration to the rider, there is also a new swingarm design for improved stability and revised settings for the rear shock. RM85 The RM85 is the baby of the 07 Suzuki dirt bikes but still has features similar to the full size motocrossers. The bike is powered by a 84.7cc liquid cooled motor with aluminium exhaust valves and an exhaust valve governor system similar to the RM125.
Suspension is taken care of by 37mm Showa inverted forks up front and a Showa rear shock with an aluminium swingarm at the rear featuring an easy chain adjust set up like the RM125 and 250. Suzuki dirt bikes are hard not to notice in the world of motocross, particularly with one of the most talented riders on the planet, Ricky Carmichael, winning races and championships on one. (photos courtesy of suzukicycles.com) If you've seen the 07 Suzuki dirt bikes click here to check out the current range Please note that to protect our younger visitors to Motocross 101, SafeSearch is turned on in these search results.
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