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XB31B 250cc Dirt Bike
The Zuma XB31-B 250 uses the well proven ZONGSHEN air-cooled four stroke engine , but with a vastly improved fully cradled seamless high strength steel chassis, no more separate bash plate for even greater strength. The rear swing arm has also been improved by increasing its length to accommodate the larger 18" rear wheel. Rear lower suspension points now use superior greaseable needle roller bearings coupled to a quality SHOWA technology rebound adjustable hydraulic shock that responds immediately to adjustment. Front suspension has also received a boost in the form of fully adjustable compression and rebound adjustable quality SHOWA technology USD forks that feel just fantastic. Improvements don't stop there, brakes have had an improvement in the form stainless steel braided hoses which offer, better brake feel. The front wheel is now 21" to fall in line with the 18" rear wheel making the XB31-B meet and equal international standards and get away from the 19"- 16" sizes frequently used on the Hummer models. Seat length has been increased providing a greater level of comfort. Drive chain is now a higher quality KMC brand offering better wear characteristics. The Air-Filter is a Australian made sponge, sports filter specially made for Zuma, this was required as the standard air filter is inadaquate.Turning circle has been improved 50% over the Hummer 250 making tight trail work a breeze. The XB31-B is now one of the best 250cc dirt bike in its class and are selling like hot cakes for under $2000, so get in and grab yourself the best there is complete with 3 months warranty and Zuma's garrenteed full spares back up.
For more information on the XB31B 250cc Dirt Bike please view the specifications below or contact us.
Specifications
| Category | Motorcycles |
| Engine | High performance Zongshen 4-stroke, Single cylinder air-cooled |
| Displacement | 250cc |
| Bore and Stroke | 67mm x 65mm |
| Compression ratio | 9.2:1 |
| Max Power (Kw/rpm) | 11.5 kw / 6500 rpm |
| Max Torque | 15.5 Nm / 5500 rpm |
| Cooling | Air |
| Fuel Type | Â Unleaded 92 Octane |
| Start | Electric & Kick |
| Ignition | Electronic CDI |
| Spark Plug | U22FSRU Nippondenso |
| Charging Circuit | Magneto Regulated 12 volt |
| Clutch | Wet multi-plate |
| Transmission | 5 speed manual 1-0-2-3-4-5 |
| Drive | Quality KMC Chain |
| Max speed | geared to 90 km/h |
| Engine oil | 15W/ 40 SF or Higher |
| Fuel tank capacity | 4 Litres |
| Air filter | *Australian made Performance Sponge filter. |
| Front Suspension | Quality SHOWA tech USD Compression & Rebound adjustable front forks |
| Rear Suspension | Quality SHOWA tech adjustable rear shock |
| Wheel front | Alloy 21 inch |
| Wheel rear | Alloy 18 inch |
| Brakes front | Hydraulic wave disc |
| Brakes rear | Hydraulic wave disc |
| Seat Height | 960 mm |
| Ground Clearance | 320 mm |
| Wheel Base | 1365mm |
| Dimensions L x W x H | 2030mm x 750mm x 1200mm |
| Dry Weight | 98 kgs |
| Max. rider weight (kg) | 100kg + |
| Ages | 14 to Adult |
| Features | Sports alloy muffler, Quality fold back brake and clutch levers, Alloy Fuel Cap |
| Park brake | N/A |
| Colours | Blue (with black frame, engine & blue/red trims) |
| Warranty | 3 months |















