How do you run this engine setup and is for looks or actually work !!

Diamond Back

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I am doing this real nice custom one of a kind FANTA ORANGE SODA Bike Build and this duel setup would be crazy Awesome if I can fit it in this frame.. But what I want to know is how do you hook up the two spark plugs.? Do I need two 2 CDI's or one 1 ?? and would the stock magneto put out enough juice or are we just going to get TWO weak spark plugs ??

If I am running a RSE Reed Valve with a windowed piston and GT80 3 transfer port cylinder I am going to have two run it a little richer air/fuel mixture so would I just run TWO NT Carburators.?? And how do I hook up the Dual throttle cables in to one.?? It would Kinda be like the throttle set up on a BANSHEE ATV... I would also like to run a Dual exhaust set up where it would split into two Header pipes spliced together like a "V" coming out the Exhaust port and running straight back on both sides...This could actually be Possible and preety SWEET,,,,,!!! OHH YEAA

So I am shure that I am not the only one to try this set up,, so if your out there and have this setup can you please give a guy some solid advice and direction,, and I would like to hear anybodys thoughts about this DUEL setup..

Thank you all for your help !!!
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the dual carb setup is marketed as a performance upgrade but really is just a huge pain to tune and one more thing to break. it's a slight decrease in performance even when properly tuned.

the dual spark potentially improves reliability by adding redundancy, but misses the mark by adding redundancy in the most reliable parts of the ignition system. it offers no performance except for any gains from just being a better head in general.

welcome to the world of snake oil. there's lots of it available. an easy way to gauge what is and what isn't snake oil is to look at what the racers are doing. notice that none of them use these parts, nor do they use boost bottles or nitrous kits.
 
your right,, I am not new to this hobby and wanted to see what others thought about this ALL SHOW AND NO GO setup,, There are hundreds of parts out there between all the vendors and reverse copying that are just junk and can really screw someone and there engine up by beliving and slapping all these parts on can get you lost with no return,,!!! These engines wern't desighned to be race powerplants,, there just a simple two stroke desighn to get something going at minimal cost,,!!

I also am like many of us motor heads where we choose the two stroke over the four stroke cuz we love to tinker and modify and be able see and feel the difference of our ideas and labor,,, We all feel proud when we do something and we get a few ounces of power out of it,,,and then we also feel the the depths of our time and labor when we lose some power..!!

REALLY the best thing to do with these little buggers is to give them a good cleanup and some widening of the ports a little and you have a great reliable power plant to aid us in the PEDAL ASSIST world of travel...The worst thing that some one can do is to do a bunch of modifications at once ,, cause then the guessing game begins and the fustration,, Its a great HOBBY to chat and discuss and convlicting ideas in these forums and to read the JENNINGS HANDBOOK and DRAGONFLY and learn by trial and error by doing one Modification at a time..

But at the end of the day !!!! its all about keeping it simple !!!!!
 
Well, if it's for show I'd keep the duel plugs and drop the duel intake, the head looks cool with a double plug and since it's show you can cap and wire one plug with a false end (or just hook it to a CDI that isn't hooked up to anything) and the other plug make as the actual ignition source.

Pick up some Fanta orange brake caliper paint (or whatever paint won't melt from heat and chemicals) and paint it up a bit. Definitely get a barrel type rear mount gas tank, the stock one would kill the look. Maybe get a leather saddle bag to spice it up a bit (plus it's cooler than a white plastic bag dangling off the handlebars.
 
http://shop.crmachine.com/product.sc?productId=69&categoryId=19

That's the ignition system for a twin spark plug head.

As far as dual carbs you have to balance the carbs for proper operation and without a balance gauge it would be almost impossible to balance them out to operate perfectly.

Now for me I thought of running it but having one be a dummy by blocking off the port on one side and only have one carb functional. It would be basically the same as having a long intake which Ive read increases low rpm torque.

I personally would go with two spark plugs just for the performance look but the truth of the matter is they really don't do much.
 
http://shop.crmachine.com/product.sc?productId=69&categoryId=19

That's the ignition system for a twin spark plug head.

As far as dual carbs you have to balance the carbs for proper operation and without a balance gauge it would be almost impossible to balance them out to operate perfectly.

Now for me I thought of running it but having one be a dummy by blocking off the port on one side and only have one carb functional. It would be basically the same as having a long intake which Ive read increases low rpm torque.

I personally would go with two spark plugs just for the performance look but the truth of the matter is they really don't do much.
ON these cable operated carbs if you are running 2 you can't balance them with a gauge, you only use that on a pair of cv carbs.

Definitely would pick the double plug head and only keep one running, it just has a certain almost v-twin type of look to it, in either case it would make anyone look twice to see if they are really seeing what they think they see.
 
ON these cable operated carbs if you are running 2 you can't balance them with a gauge, you only use that on a pair of cv carbs.

Definitely would pick the double plug head and only keep one running, it just has a certain almost v-twin type of look to it, in either case it would make anyone look twice to see if they are really seeing what they think they see.

I don't see why you couldn't balance them using a gauge. All the gauge does is read vacuum through the throat of the carb. The balancing is to ensure each carb is set identical so they can be tuned to each other. But maybe these small 2 stroke carbs are different.

In any case I thought of only doing it so one was a dummy and only one worked. As far as the dual head I don't think I will run the dual plug head. I might but I have to find one that is dual plug without the compression release which I found a few but nothing I liked.
 
Yeah... What he said:rolleyes: but I'll just spell "dual" correctly:p
The decomp head has its valve at 90 deg to the plug, not 180 like the dual plug head.
 
I don't see why you couldn't balance them using a gauge. All the gauge does is read vacuum through the throat of the carb. The balancing is to ensure each carb is set identical so they can be tuned to each other. But maybe these small 2 stroke carbs are different.

In any case I thought of only doing it so one was a dummy and only one worked. As far as the dual head I don't think I will run the dual plug head. I might but I have to find one that is dual plug without the compression release which I found a few but nothing I liked.
Their is a guy on here, I think he goes by bikebuilder who uses the dual intake. He has a cabling system that has the second carb. kick in like manual secondaries on a old holly. I could be wrong on this but this seems like it would be better as the little tiny motor wouldn't have to make up for so much intake volume till it had enough rpm to do so.
 
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