**Wheel Swap Out.** I want to go with a set of spoked offroad wheels. Is anyone familiar with the Xmoto who could offer some advice on doing so?Ģ. **Suspension set up.** I would like to keep the suspension components already on the bike but just tune them for offroad use. I have the following questions for you guys since my dealer knows absolutely nothing the G650X bikes.ġ. I am outgrowing my supermoto addiction and now want to get back to my dirt riding roots by converting my BMW G650Xmoto into an enduro/dualsport bike. Gear ratios: I 2.750 II 1.750 III 1.310 IV 1.050 V 0.I hardly ever post here but I am an AVID reader. Valves per cylinder/intake/outlet dia(mm): 4/36/31įuel supply: Electronic manifold injection, BMS-C IIĮxhaust management: Fully controlled three-way catalytic converterĬlutch: Multiple-plate clutch in oil bath ![]() Valve/gas charge management: DOHC (double overhead camshaft) To build up sufficient stabilising gyro-forces also on difficult and slow trails, the G 650 Xchallenge comes with a front wheel measuring 21 inches in diameter and running as standard on a 90/90-21 tyre, while at the rear an 18-inch wheel running as standard on a 140/80-18 tyre allows the use of specialised offroad tyres whenever required. The wheel hubs made of aluminium are hollowcast and are connected to the epoxy-plated aluminium rims by extra-strong wire spokes. Due to their better elasticity, spoke wheels come as standard on the BMW G 650 Xchallenge, offering all the features of lightweight technology. It almost goes without saying that the wheels and tyres also meet the typical requirements of offroad riding. The result is even better grip and traction when accelerating all-out, as well as extra safety when applying the brakes.Īny risk of the springs sagging and giving way, as is often the case on long, undulating surfaces and under high loads, is largely excluded by “natural” adjustment of the spring rates in the air springs together with the frequencyspecific damping effect: An adjustment bolt opening up a bypass in the damper enables the rider to pre-set the damper characteristics to two stages for either more comfortable riding on regular roads or for a firmer set-up on offroad terrain. ![]() And an important effect achieved in this way is much better traction of the rear wheel on bumpy, undulating surfaces: The damping effect can be appropriately adjusted in the frequency ranges typically encountered on the rear wheel swing arm as a result of bumpy surfaces, the wheel thus following any such bumps in an ideal motion, maintaining optimum ground contact at all times. And to pump up the system while travelling, the rider has the option to use a hand-operated high-pressure pump fitted beneath the seat of the G 650 Xchallenge.Ī feature unique to this air spring damper system is the choice of frequencyrelated damping achieved by varying the inner flow system together with the throttle openings. The system adjusts very easily and conveniently to different load conditions simply by varying the pressure filling. To the outside, the spring strut is sealed hermetically and is therefore protected from contamination, with any losses caused by leakage being set off by filling in air through a valve. The reduction in unsprung masses also improves spring response and traction on the rear wheel. Individual adjustment and set-up of the suspension matched to the rider’s weight and the load carried by means of a water level presenting the normal position and trim of the motorcycle.Low weight of the entire system and its components.Simple option to adjust the dampers to the load carried. ![]() Resistant to overheating (no temperature-induced weakening of the damping effect under high loads).Frequency-dependent, selective damping effect.“Natural” progression of the damping effect under high loads (the viscosity of air increases as a function of temperature).Reliable and smooth operation minimising the risk of the suspension giving way (physical law of gases: pressure increases as a function of temperature).“Natural” progression of spring rates under high load (with growing pressure within the system).Since gas is compressible, the air within the system can act as a kind of spring replacing the usual steel spring and thus offering the advantages already lauded on the BMW HP 2 Enduro: Instead of hydraulic fluid, however, this system forces out air through plate valves into a second chamber, the damping effect being achieved by throttling the flow of air. ![]() The BMW Motorrad Air Damping System comes with a piston inside, similar to the configuration in conventional spring struts.
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