It’s a popular mod to add a divider plate in front of the slide on dirt bikes. Adds air velocity in the carb making the throttle more precise at lower rpm. Wondering if this could work with a cv carb and remove some woes of upgrading to 36mm carbs. I can’t find info on adding divider plates to cv carbs on the net.
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Divider plates in 36mm carbs
- Thread starter Motorcyclerider
- Start date
I think this link shows a little of the concept. The idea is to have more consistent air velocity (speed and direction) where the gas jets can do their best work at partial throttle. Now I would wonder if the current carbs would have this already baked into their design (anticipating the turbulence)? Note the diagram. Any jets upstream of the slides would need to have divider NOT cut them off. https://richstayloredporting.com/vintage_Venturi.html
Yes Ted. Same idea. Worked great on the dirtbike but obviously they don’t have butterfly’s. The plate would sit in front of them. Even if the plate it opened slightly the air moving past I would think is going or have a larger pressure drop then if I a divider were in place. Although there would be a gap
This particular tuner puts the dividers in front and back. Changes will need to be made to the jetting. My Kawasaki kdx I put a plate in was lean and it fixes the condition made it run like a different bike. There was guy Ron from RB designs that would add these dividers and a several other mods and I’m aware he did it to street bikes but they may have been two strokes. It may be a two stroke or non cv only mod.
Besides fitting a Jeep Led 5x7 light into the oem light fixture not sure I’ve had any other groundbreakers. I’m 20 years to late and 50 IQ points to low
I’ve got several bikes and it’s that time of year the sport bikes go to sleep and the c10 comes out. I always tinkering with the bike I’m currently riding so back to the c10. I’ve got to go a touch leaner on the main for the 36’s. I’ll be down to a 110 using the needles from factory pro. Just went for a ride and swapped the c10 igniter out for the 86 ninja 1000 igniter and there’s a noticeable performance increase. Nothing crazy just more responsive. There’s a guy who made his own cdi box for the Kawasaki kdx200 and other two strokes. He changed capacitors and whatever other parts inside the cdi and was able to change the ignition timing and add more spark. Even had knobs to make on the fly adjustments. Would be cool to make one for the c10. Not sure I’ve got the wits though. Interesting read. https://www.dragonfly75.com/motorbike/JNM/CDI.htm
I’ve got a 96 gpz1100 airbox and I don’t think the engine needs more air then what the airbox supplies. Maybe I’ll get one of those electric turbos though and fit it to the airbox. I’ll pick up a few ponies that way.Not sure I’ve got the wits either, but thinkin' about this;
On your ZX airbox you have a port that originally was attached to a chamber.
As I recall you are not using that port.
(Justa thought) Here's a "what if"
Instead of smaller mains,,, "What if" you attached a valve to the port that opened when you needed more air?
Could be vacuum or electric controlled.
Not finding exactly what I'm talkin' about; this will demonstrate the idea.
2'' 51mm Control Valve Set Vacuum Actuator Closed Style + Remote Control | eBay
When you press "on' on remote, the vacuum will start working, the valve is opened. When you press remote, the valve is opened within about 3 seconds. 1 x Vacuum Hose. - After about 10s, the pump will be closed automatically, the valve stay open.www.ebay.com
PS: Just the control portion of the above could control vacuum to your carb butterflies.
Car Vacuum Actuator Electric Valve Wireless Remote Control Kit | eBay
When you press remote, the valve is opened within about 3 seconds. 1 x Vacuum Hose. Manufacturer Warranty6 Month. Manufacturer Part Number100003.www.ebay.com
I realize this is a shot at me. I know I’m not the sharpest knife in the drawer but I’ve never been misleading or mean to anyone here and continue to pay my membership dues to support this community and all the information it has given me. Idk if I come off as some sort of hot shot or know it all but that’s not the case. I just like working on bikes and I’m lonely so I post about it. Ever since I started to mod my bike and post here I feel like you guys have taken it the wrong way. Like I’m trying to steal credit or out do somebody. Everyone knows who has done the most performance work to this bike.Not sure I’ve got the wits either, but thinkin' about this;
On your ZX airbox you have a port that originally was attached to a chamber.
As I recall you are not using that port.
(Justa thought) Here's a "what if"
Instead of smaller mains,,, "What if" you attached a valve to the port that opened when you needed more air?
Could be vacuum or electric controlled.
Not finding exactly what I'm talkin' about; this will demonstrate the idea.
2'' 51mm Control Valve Set Vacuum Actuator Closed Style + Remote Control | eBay
When you press "on' on remote, the vacuum will start working, the valve is opened. When you press remote, the valve is opened within about 3 seconds. 1 x Vacuum Hose. - After about 10s, the pump will be closed automatically, the valve stay open.www.ebay.com
PS: Just the control portion of the above could control vacuum to your carb butterflies.
.Car Vacuum Actuator Electric Valve Wireless Remote Control Kit | eBay
When you press remote, the valve is opened within about 3 seconds. 1 x Vacuum Hose. Manufacturer Warranty6 Month. Manufacturer Part Number100003.www.ebay.com
Do you have children? Brothers or sisters? Could you imagine how you would feel if one of them decided to take it upon themselves to permanently remove themselves from the world? Well it’s happened to me this summer. As if I haven’t been through enough already. I don’t choose for people to dislike me. I don’t choose to be born. I will choose to stop posting here though.
Wasn't taking a shot at you in any way.
I was just agreeing with you that I also don't have the wits to do a CDI box mod.
You said; Would be cool to make one for the c10. Not sure I’ve got the wits though.
And I said; Not sure I’ve got the wits either,
I then shared info and discussed your idea.
I'm out of here.
Ride safe, Ted
I was just agreeing with you that I also don't have the wits to do a CDI box mod.
You said; Would be cool to make one for the c10. Not sure I’ve got the wits though.
And I said; Not sure I’ve got the wits either,
I then shared info and discussed your idea.
I'm out of here.
Ride safe, Ted
You have misunderstood something somewhere. I haven't seen Ted take any shots at you or anyone else. I thought he was enjoying your conversation. Ted just doesn't behave badly and is about as diplomatic as anyone I know. You should reconsider. We're glad you're here feller. Take the win.
@Motorcyclerider I believe a misinterpretation has occurred here.
@connie_rider was contributing to the conversation and although all ideas may not be viable I don’t see any intent to smear you - rather I / we (if I may speak for others) applaud the fact you or others are innovating or trying something new.
Looking forward to the conversation continuing, if not - well that is a shame (and especially over a misunderstanding) either way I respect your choice.
Wayne
I’ve looked into this a little more. I’ve looked at the link you posted. RB designs was the kdx specialist but he closed shop. The divider is in front of the slide behind the intake boot. Is that what you meant by saying to have a divider not cut them off? The divider plate for the kdx200 woods bike that has a mechanically operated slide. It sits in front of the slide. Really changed the power characteristic of the bike. Really responsive right off idle and if you go WOT it just accelerates without any 2 stroke powerband delay.
I’ve done a lot of tinkering with the Connie although the special services and parts that used to be available for purchase through a reputable COG-member are no longer available. I’ve had a little help but have had to do the brunt with figuring out how to make these mods work. My bike has ninja cams 7 degree advance on the exhaust. 36mm carbs(ninja size) from a gpz 1100 and instead of installing the foam in the airbox I located a 96 gpz1100 airbox and fitted it as it has a much smaller opening then the oem airbox.
The biggest drawback of these mods is the torque loss. Well after modifying my kdx carb I thought it might work on the c10. After having a look at the carbs of the c10. Being that they are cv the butterfly leaves no room for a divider plate. However the intake boot could accept a divider plate. They will cost next to nothing to make and can easily be removed. I’d like to see if it increases the intake air velocity and mitigating some of that torque loss. I’ll get to it during the week and see what happens. Could be a loss or a possible gain. The way the kdx responded makes me want to try.
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Yes; I was referring to the orifices/jets that need interaction upstream of the carb. It has been a while since I looked at the C10 carb jet location/orientation so it may not be an issue. I am just thinking that by putting a divider to improve the velocity in the lower area (when the slide is more closed)...the velocity in the upper area will move lower which means that any orifice/ jet in that upper area it would become more stagnant..that's what I am thinking.
Yup the more I look into it obviously not going to work with the cv carb and the cv carb doesn’t have the draw back of a mechanically operated slide. When the throttle is opened sharply there’s a lean condition momentarily. Obviously the cv opens the slide as needed.
I’m hoping putting the plate/splitter in the intake boot will effectively give me two bore sizes. A smaller one for lower rpm smaller throttle openings that keeps air velocity up and a large one with the throttle fully open. I’ll report back when I get it done. I’m waiting on a set of mains to arrive as I wanted to go leaner as I think I’m still too rich with the 36mm carb swap.