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Dirt and Trail August 2018

August 2018 issue of SA's only offroad and adventure magazine

N E W B I K E S

N E W B I K E S Two-Stroke Specific Upgrades 125 – New piston – Improved lubrication and new crankshaft bearings 250 & 300 – New cylinder 15% lighter with improved cooling and reduced friction between piston and cylinder – New exhaust valve actuation system – New ignition management system – Lighter stator to reduce inertia – More powerful ignition coil reduces fouling rate and claims to improve engine efficiency – New carburettor settings 50 DIRT & TRAIL MAGAZINE AUGUST 2018

Four-Stroke Specific Upgrades 250 & 300 – New bore x stroke on 250 SEF – 2019 = 78 x 52.2mm (versus 76 x 54.80mm in 2018) – Tweaked intake and exhaust ports – New mapping – Improved camshaft profile – New 31mm intake and 26mm exhaust valves – Lighter clutch basket 450 & 500 – Reinforced head gasket – Increased compression ratio from 11.8 to 12.3 – New balancing mechanism – New mapping – New cylinder (500) – 98mm piston (500) DIRT & TRAIL MAGAZINE AUGUST 2018 51

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