Miniature Vacuum Relief Valves

Pseudo-slipper clutch - SuperHawk Forum

I have been pondering the idea of a slipper clutch or some form of engine braking reduction on the VTR for some time now. While I have finally stumbled across a slipper clutch for the VTR (made by TSS, but ridiculously expensive), the introduction of air bleed anti-compression braking systems on snowmobile four-strokes engines in the recent past has left me thinking those fateful words "hey, I can do that". Well, it seems I was not alone with that thought and one of the fine chaps on the vtr1000.org site did more than think about it, he went out and fashioned just such a system using a couple of vacuum relief valves ( www.vtr1000.org • View topic - inTech vacuum control system? ) Ported & milled heads, Yosh cams, lwt flywhl, JE pistons, Carillo rods, bal'd crank, DLC-coated bits, Akra exh, DJ kit, modded slides, billet stacks, Flo-Comm, HRC thrtl tube, stick coils; FP shift kit, JDM shifter; Samco hoses, SPAL fan, Durbahn scoops; Brembo radial MCs, F4i calipers, 320mm EBC rotors, lwt rr rotor; 900RR forks, GV kit, OMT triples, Apex 4" risers, Pazzos, Shindy damper, Ohlins shock, braced swinger; Sargent seat, PVM Mg rims, Ti bits, Mori carbon lower, Li-ion battery... Ported & milled heads, Yosh cams, lwt flywhl, JE pistons, Carillo rods, bal'd crank, DLC-coated bits, Akra exh, DJ kit, modded slides, billet stacks, Flo-Comm, HRC thrtl tube, stick coils; FP shift kit, JDM shifter; Samco hoses, SPAL fan, Durbahn scoops; Brembo radial MCs, F4i calipers, 320mm EBC rotors, lwt rr rotor; 900RR forks, GV kit, OMT triples, Apex 4" risers, Pazzos, Shindy damper, Ohlins shock, braced swinger; Sargent seat, PVM Mg rims, Ti bits, Mori carbon lower, Li-ion battery... Personally I do like the engine braking and tend to use it to my advantage with my style. So I would want a very small setting but depending on how it "hits" or "engages" or what ever, might cause other problems. What I mean is it could upset the chassis or the rider if you had a good amount of engine braking and then it just kind of went away. So I am interested in hearing your impressions of how it feels when it actuates. I guess I try not to dump the clutch when going down a gear without reving? I have done down shifts that have required all of the rrrrrr's for the next gear down, shifting in at 9-9500. No wheel hop. You just have to trust the rev limiter, rev above the rpm you are going to need, and just release the clutch.

The Chemical engineer

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