Multiplicate 125cc / 150cc / 200cc / 250cc air-cooled,ZONGSHEN  Four-Stroke
with Single Valve Motorcycle Engine
Revised camshafts, carburetion and TPS tuning, new exhaust and ignition systems work
together to produce a quick-revving engine with even more low- and mid-range
power. 
26-30mm Japanese MIKUNI or KEIHIN Carburetor with throttle position sensor (TPS)
ensures ultra-precise fuel/air mixing and lightning-quick throttle response. 
Revised transmission ratios in the Five-Speed Gearbox-Wider in 1st through 3rd, and
closer in 4th and 5th. Transmission 5 speed manual clutch (1-N-2-3-4-5) 1Down,4
UP international shift.
All-new BFD Steel / Aluminum Frame helps reduce weight while optimizing mass centralization.
An extensively tested assembly of aluminum forgings, castings and extrusions.
The new BFD Frame retains legendary BIFEI handling and response. 
Removable aluminum rear sub-frame constructed of square-section tube for reduced
weight. 
Fully adjustable air/oil-separate 48mm fork tubes deliver precise, fade-free handling;
fork protectors provide excellent tube protection. 
Swingarm adopts BFD-style linkage for controlled, compliant rear suspension action.
Revised axle and holders reduce weight in a critical area. 
The shock provides 6.0 inches of travel with adjusters for high- and low-speed compression
damping, rebound and spring preload:and features a larger piggyback reservoir
for excellent damping and fade resistance. 
New, wave disc brake rotors front and rear reduce unsprung weight and provide excellent
performance. Front and rear calipers with aluminum pistons deliver strong
stopping power with progressive feel. 
Lightweight 19-inch front and 16-inch rear wheels provide exceptional durability
and reduced unsprung weight for optimal suspension performance. 
Premium Dunlops offer unbeatable, competition-spec traction and excellent wear.
BFD-B250 Series bodywork, new engine covers and a thick new seat look great and feel
excellent on long rides. 
Slim design lightweight steel fuel tank holds 1.10 gallons. 
One-piece, high strength, CNC Aluminum skid plate shaves weight and offers great
protection. 
Adjustable CNC front brake lever. 
New double ply aluminum muffler. 
New handle bar grip set.
KMC 428 CHAIN 120 NODE
Front / Rear Aluminum Wheel Hub and Rim.   
Front wheel collar makes front wheel removal quick and easy.