Re: Throttle response
Posted by shinyribs on Nov 15, 2012; 4:48am
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/Throttle-response-tp4032143p4032148.html
I dont have any CV carb experience at all. I also know of the CV carb w/pod issue you hear so much of. While I can completely understand the ''it'll never work' point of view, I also have pulled off some stuff in the past that others said couldn't work. Anyway,just going off old drag racing experience here(cars). Does your accel pump feature have any way to adjust it? Whether it be factory supplied adjustment,or improvised? When I would have a car that would bog off the line,such as your bike is doing, 90% of the time it was accel pump adjustment. Either too much fuel was being shot in and causing a rich-bog,or too little and it was create a lean-stumble. It's hard to tell a stumble from a big at times. A rich-bog will usually clear up on it's own if you stay in the throttle long enough(feels lazy-then pulls)where a lean-stumble can clear up,but normally require you let off the throttle or at least feather it. Sometimes a bog will feel lazy and smooth,where a lean-stumble will feel uncontrolled and even feel like the engine is vibrating/struggling. Not sure if that makes any sense,hard to explain. If there is any way to adjust the output of your accel pump function you may be able to tune it out of your bike. I dont know if you could modify linkage to activate sooner or later,or if maybe you would have to drill out or restrict the pump nozzle to richen or lean the mixture.
FWIW I really hope you can get this figured out. If you do you'll be a hero to alot of guys. Maybe even myself if I ever get to own a DOHC
Good luck !
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/Throttle-response-tp4032143p4032148.html
I dont have any CV carb experience at all. I also know of the CV carb w/pod issue you hear so much of. While I can completely understand the ''it'll never work' point of view, I also have pulled off some stuff in the past that others said couldn't work. Anyway,just going off old drag racing experience here(cars). Does your accel pump feature have any way to adjust it? Whether it be factory supplied adjustment,or improvised? When I would have a car that would bog off the line,such as your bike is doing, 90% of the time it was accel pump adjustment. Either too much fuel was being shot in and causing a rich-bog,or too little and it was create a lean-stumble. It's hard to tell a stumble from a big at times. A rich-bog will usually clear up on it's own if you stay in the throttle long enough(feels lazy-then pulls)where a lean-stumble can clear up,but normally require you let off the throttle or at least feather it. Sometimes a bog will feel lazy and smooth,where a lean-stumble will feel uncontrolled and even feel like the engine is vibrating/struggling. Not sure if that makes any sense,hard to explain. If there is any way to adjust the output of your accel pump function you may be able to tune it out of your bike. I dont know if you could modify linkage to activate sooner or later,or if maybe you would have to drill out or restrict the pump nozzle to richen or lean the mixture.
FWIW I really hope you can get this figured out. If you do you'll be a hero to alot of guys. Maybe even myself if I ever get to own a DOHC
Good luck !
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