THE BRADLEY REPORT
smoother downshift overall." In effect giving riders a dual action, throttle matching and controlled clutch slip. " During rapid deceleration, the load on the rear tire can be reduced, causing the rear wheel rotation to lag behind the vehicle ' s actual speed," explains Ono-san. " If load is reapplied to the rear tire while in this state, the mismatch cannot be fully absorbed, resulting in wheel hop. The system detects this condition and applies halfclutch control. By allowing the clutch
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to slip rather than the tire, vehicle stability is improved." This rear-wheel hop mitigation first appears in Honda ' s 750 series models, including the Honda Transalp, marking an evolution in E-Clutch ' s role, from convenience feature to active stability enhancer. However, implementing such control across multiple engine platforms is no simple software update. Each engine configuration behaves differently. " Each engine had its own characteristics, so it required settings tailored accordingly," says Ono-san. " In particular, we struggled with accommodating differences in rotational fluctuations, as well as variations in engine response and torque delivery." An inline four spins differently to a parallel twin. Torque pulses, crank inertia, throttle response curves, all influence how a clutch must engage or slip. The engineering challenge lay in mapping those characteristics precisely enough that riders never sense the calculation behind the curtain. Riding modes add another layer of nuance. In Rain, throttle response is softened; in Sport, it sharpens. Because TBW decouples grip rotation from actual butterfly valve opening, the clutch must interpret not just what the rider is doing, but what the engine will do next. " Depending on the selected mode, such as RAIN or SPORT, the actual throttle butterfly opening varies relative to the grip opening," explains Ono-san. " The E-Clutch performs appropriate clutch control in accordance with these changes in butterfly valve opening." In practical terms, Honda says that this means a consistent feel and that off road, the system ' s benefits become even clearer. On adventure machines, riders frequently juggle balance, throttle, braking and terrain reading simultaneously. " First, the presence of the E-Clutch eliminates concerns about engine stalling," says Ono-san. " It also removes the need to worry about operating the clutch lever. As a result, riders can focus on riding with greater confidence during off-road conditions, where increased attention to surface conditions is required." On loose terrain, where traction can fluctuate unpredictably, the 750
THE BRADLEY REPORT
series system goes further. It can execute appropriate upshifts even when the rear tyre is slipping under acceleration, maintaining drive without compounding instability. Despite all this automation, Ono-san was adamant about preserving familiarity. " We were committed to a configuration that does not change the control layout," he emphasises. " The clutch lever is installed in the same way as before, and without any special operation, simply pulling the clutch lever instantly provides the same feel and operation as a conventional manual motorcycle." That decision underlines a philosophical difference. E-Clutch is not a replacement for manual riding; it is an augmentation. Riders can ignore it entirely and operate the clutch as usual. Or they can let the system handle routine modulation while they focus on lines, braking markers or traffic. It also has a trick up its sleeve for riders who want that traditional engagement. " We enabled the E-Clutch to be turned off for situations where the rider does not want the clutch to disengage automatically, for example, during low-speed riding, where you may want to run right at the edge of idle speed," says Ono-san. " We believe that being able to revert completely to the same operation as a manual motorcycle is a unique advantage that other automatic clutch-control systems do not offer." It ' s a small switch with big symbolic weight; the choice remains in the rider ' s hands. Yet perhaps E-Clutch ' s most impressive achievement is how invisible all of this feels from the saddle. " We evolved the control logic in accordance with the vehicle characteristics and usability, maximising the value the system can deliver," says Ono-san. " In addition to functional enhancements such as coordination with TBW, refinements have also been made in finer details to improve the feel of vehicle launch and gear shifting." Honda claim that this latest iteration of its E-Clutch quietly redraws the boundary between manual and automatic. The clutch lever remains. The gearbox remains. The rider remains central. " The invisible intelligence now woven into the relationship between rider and machine hints at a future where technology supports rather than supplants- it doesn ' t change how motorcycles are ridden, but that it redefines how they feel every shift, every start, every stop.".
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