triple cylinder banshee build

[portingjunky]

My name is Kevin. And I just started working on my first triple cylinder banshee.All i have done so far is took 2 banshee cases and milled them to fit together, and also milled a left side cylinder to fit next to another left side cylinder.I am planning on keeping it stock stroke and stock cylinders with a nice top end port job ,cpi outer frame pipes and 35mm air strikers. I was wondering if anyone can point me out to a ignition set up i should use, and maybe some tips on how to go about building this engine. Thanks guys.

[J-Madd]

Good luck with the build, but know that it will probably be beat by a twin cylinder at the track or dunes. Cheaper and easier to build a BIG twin, but I bet you already know that. Again...good luck.

[FireHead]

My name is Kevin. And I just started working on my first triple cylinder banshee.All i have done so far is took 2 banshee cases and milled them to fit together, and also milled a left side cylinder to fit next to another left side cylinder.I am planning on keeping it stock stroke and stock cylinders with a nice top end port job ,cpi outer frame pipes and 35mm air strikers. I was wondering if anyone can point me out to a ignition set up i should use, and maybe some tips on how to go about building this engine. Thanks guys.

The ignition really depends on how you setup the crankshaft. Do you have two cylinders in the same phase, three different phases, or some sort of odd-fire setup?

 

If you are sticking with an OEM style crankshaft with an extra pin,rod, and cheek scabbed on, then you can use an OEM ignition setup, and just need yo use an aftermarket triple wire output coil (common for outbard marine engines).

 

If you want to get more exotic, then the sky is the limit.

[portingjunky]

the crank i am going to build is going to be a three phase out of 2 stock cranks. I looked into using a ignition off a Polaris xlt 600 triple but im not sure if there fly wheel will mate on to a banshee crank shaft. And im only doing this one mild because i have a lot of spare stock parts and i wanted to see if i could do it. If it works out i will see about shelling out the money for a 10 mill crank and milling out a mono head at my work.

[Drewski]

sounds sweet, keep us updated on this!

[TurboBanshee420]

just weld some lugs on the stock banshee flywheel every 120* and use everything stock except the coil. Have the crank made the same way, make sure it's welded at the pins once it's degreed. That should take care of your ignition worries.

[portingjunky]

Does a stock banshee ignition fire both coils twice per revolution. i would think it does, for the fact you can swop coil boots and not chang the way the engine runs. is this the same with on other triple two stroke engines; do they fire 3 times for every revolution. if this is the case i could see adding and changing the slugs arond on the fly wheel and plugging in a triple coil set up.

[TurboBanshee420]

yes. it fires both plugs every bang... it's called "wasted spark"

 

if you had a coil with 3 wires it would fire all 3 plugs at the same time. This also means that the coil is wound differently to have enough ass to spark all 3 plugs at once.

 

he just needs a banshee flywheel with 3 lugs, one every 120* and a triple wire coil off a polaris XLT or something like that

Edited August 17, 2009 by TurboBanshee420

[portingjunky]

I would agree on just finding a 3 point fly wheel. If any one knows of one that will mate up to a banshee crank would you please let me know.

[slopoke]

ummmmm if you can do all this other "mating" shouldn't mating a flywheel to the crank should be a cake walk huh????? Just asking

[portingjunky]

ummmmm if you can do all this other "mating" shouldn't mating a flywheel to the crank should be a cake walk huh????? Just asking

I rather pay a few bucks than machine. machining takes time. i already have to make a kool head from scratch.

[grizzly700]

this sounds cool man. i hope it all works out for you. can we see some pics of wat youve done already. i wonder how many triple banshees there can be out there?

[sheefreak]

There are a ton of tripple banshees out there, just not many like this one.

[portingjunky]

Ill see out about getting pictures for you guys tomorrow.

 

[portingjunky]

O by the way there are some triple banshees out there; and the ones ive seen are either 2 cases mated up together or are $2000 billet crank cases. I dont feel like spending 2 grand or a lot of hours righting a program to hog one out.