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• 21:47, 4 June 2026 Jeff talk contribs created page Rotax V990 (Created page with " Pneumatic Power Clutch/slipper clutch/PBTL System details are in [https://www.apriliaforum.com/forums/showthread.php?65496-Aprilia-Rotax-and-V990&p=745935&viewfull=1#post745935 this apriliaforum post]. <blockquote> PBTL SYSTEM The PBTL system on the RSV 1000 reduces the ‘braking’ torque transmitted by the engine during deceleration. OPERATING PRINCIPLE: Line 1 is connected to the intake passage whereas line 2 – downstream of the retaining valve – is connecte...")