Chape Posted September 12, 2008 Report Share Posted September 12, 2008 (edited) I was dragging my brothers car one day. And after we got done dragging we were riding back to my house when all the sudden I had a huge backfire the quad died. At first I thought I flooded the spark plugs because I had a freind "Who never rides" playing around on it. So I go to change the spark plugs and the left side is perfect little brown not dry a little wet the way I like it a little safer so im told. The right side spark plugg is missing the head of the spark plug and tehre is what appears to be little metal shavings around the spark plug. I then put 2 new spark plugs in the shee and it starts up The left side is normal the right side kicks on and kicks off sounds like it wants to go but back fires alot so i shut it off because I did not want to cause further damage to my ATV. It has not been ridden to much since ive done all my upgrading but I am confused as to why it would do this with very little ride time on it should I have been running a Higher Quaily of gas? I used Prem. Gas mix with the oil 92 octain but was told maybe I should use race gas instead to help with compression. But when i did a compression check with a freind before I even ripped on her about a month earlyer the compression was fine. Upgrades I have done to bike. 19-Domes Cool head 4mm Stroker Dynotech Ignition Extended swing arm. New tough chain. Carbon Fiber Reeds. 2 into 1 Carb system CPI Inframe Drag pipes. lockout Clutch-- I Know its not really needed yet with upgrades but i got a good deal so why not. 100 bucks I have yet to pull the cool head off to look in side to cylinder to see if it did blow because I live about 2 hours from were my ATV is stored and if im going to buy parts to fix it i would rather get them here at a local store. I did all the installlation of the parts my self. I was told if i dont know anything about 2 strokes to not touch them so i took it apon my self to get to know my Shee inside and out. IM not the brightest when it comes to working with them but i can slowy find my way around. Soultion if it is blown so im told is to Get it Bored out and all that good stuff and order a new TOP END KIT for it. So questions to you guys. YOu think i blew it or is that head of spark plug some were in my cylinder? What TOp end kit should i buy for it if i have to? I have about 300 bucks to spend. Should i be running higher octane in her? ALSO CRANK IS WELLDED thanks for future helpfull replys. Edited September 12, 2008 by Chape Quote Link to comment Share on other sites More sharing options...
KlotzBanshee Posted September 12, 2008 Report Share Posted September 12, 2008 I would definitely pull the head off to see what you are dealing with before spending money on a new top end. But a mangled plug is never a good sign. Depending on your elevation you may be fine with premium pump gas, but I also run 19cc domes and with 165psi per cylinder shee runs great on a 50/50 mix of VP C12 and 93 premium. good luck. Quote Link to comment Share on other sites More sharing options...
Chape Posted September 12, 2008 Author Report Share Posted September 12, 2008 Im in Seattle washington. And any reccomendations as to witch Top end kit i should buy if i have to when I check it out this weekend. Quote Link to comment Share on other sites More sharing options...
KlotzBanshee Posted September 12, 2008 Report Share Posted September 12, 2008 If you take the head off and find that the piston and/or the cylinder is fucked up, take the cylinders off and send them to Jeff at F.A.S.T. Racing 785-364-5325. Jeff will set you up with everything you need to get her rippin again. And Quote Link to comment Share on other sites More sharing options...
Chape Posted September 12, 2008 Author Report Share Posted September 12, 2008 alright thanks Quote Link to comment Share on other sites More sharing options...
mdhc500 Posted September 12, 2008 Report Share Posted September 12, 2008 Ouch! It dont sound good. Pull the head and take a look. Can you pull the motor and take it to where you live if you have to work on it. That way you are not hurring through it... Quote Link to comment Share on other sites More sharing options...
Chape Posted September 12, 2008 Author Report Share Posted September 12, 2008 Yeah i can bring it to were I am... What exactly should i be looking for inside the motor and after i take off the head since i am still fairly new to this machine Quote Link to comment Share on other sites More sharing options...
mdhc500 Posted September 12, 2008 Report Share Posted September 12, 2008 (edited) Yeah i can bring it to were I am... What exactly should i be looking for inside the motor and after i take off the head since i am still fairly new to this machine If you blew it up to the point its not running and you have spark plug damage you will know it when you see it. If anything came apart internally dont run it any more than you have to, in fact if you know you broke something DONT run it at all. If you have cylinder wall damage you are looking at honing if not boring, new pistons rings, etc... Have them ported while they are out if they are not already and go with forged pistons. Good luck... Hope you get er running soon! Edited September 12, 2008 by mdhc500 Quote Link to comment Share on other sites More sharing options...
MistBanshee Posted September 12, 2008 Report Share Posted September 12, 2008 While mine is apart the jugs had to be looked at and it looks like a piece of plug at one time before we owned the banshee came off and bounced around in there. It left a little bit of damage to things are going to have to be bored out and changed. Left a nasty groove on one piston as well inside the housing part and the head of it has all kinds of ding marks. Quote Link to comment Share on other sites More sharing options...
LS1Inferno Posted September 12, 2008 Report Share Posted September 12, 2008 you sir have a hole in your piston. now being only one side, this is where what my builder told me comes into play. the 2 into 1 intakes can favor one side of the motor. ie the reason only one side burnt up. what octane were you running? with those domes you need minium 50/50 race and premium. Quote Link to comment Share on other sites More sharing options...
jbooker82 Posted September 12, 2008 Report Share Posted September 12, 2008 4 mill running CPI's and a 2:1. The 2:1 kind of defeats the purpose of the CPI's. Maybe you ran the bowl out of fuel. Built motor with only one carb bowl to run dry. Quote Link to comment Share on other sites More sharing options...
Chape Posted September 13, 2008 Author Report Share Posted September 13, 2008 im thinking of going back to duel carb now should i put stock ones back on or upgrade? Quote Link to comment Share on other sites More sharing options...
Chape Posted September 13, 2008 Author Report Share Posted September 13, 2008 While mine is apart the jugs had to be looked at and it looks like a piece of plug at one time before we owned the banshee came off and bounced around in there. It left a little bit of damage to things are going to have to be bored out and changed. Left a nasty groove on one piston as well inside the housing part and the head of it has all kinds of ding marks. was running 92 octane no race gas- with the oil mix... so i get from this that 2 in to 1 are not safe? Quote Link to comment Share on other sites More sharing options...
dajogejr Posted September 13, 2008 Report Share Posted September 13, 2008 1 into two are perfectly safe and great for a trail bike... There are a few companies that make the kit, and I've never heard a builder say they're unsafe or favor one side or the other. An old V8 car has a single spot for a carb that feeds 8 cylinders, and they last for hundreds of thousands of miles...I'd think if they "favored a cylinder" they'd have problems too... Quote Link to comment Share on other sites More sharing options...
Chape Posted September 13, 2008 Author Report Share Posted September 13, 2008 so trying to pin point the reason that this happend is probly the gas i was running in it was to low of octane or there was some kind of air leak some were? Quote Link to comment Share on other sites More sharing options...
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