Dino Posted July 14, 2013 Report Share Posted July 14, 2013 I am completely sick to my stomach today after 2 months of waiting I finally got by banshee out of the shop. With help and research from this website i decided to put a 4 mil stroker in my banshee , the wiseco 795s and mod quad head w/22cc stroker domes,timing +5, 200 watt stator , dynatek, port & polish, the whole 9. This thing ran like a raped ape for about 2 hours and is honestly the fastest thing I ever rode. I was smiling from ear to ear with excitement then all of a sudden the thing just shut down and would not restart. My first thought was a fouled plug so I go to pull the plug and it rocks from side to side as loose as can be I get it out and see that the inside of the spark plug is: gone! Obviously its floating around in my fuckin motor. Well I pulled both plugs out and went and bought ngk br9s instead of the 8s i was using hoping all that shit from the spark plug blew out of the exhaust and it would fire right up. I got nothing wouldn't fire. My ? Is has anyone ever seen this before and is my builder at fault for this or just bad spark plug? Did the piston travel too high maybe? Thanks for your help it is actually back at the shop right now my builder is gonna pull the head and try to see what happened .. Quote Link to comment Share on other sites More sharing options...
Jereme6655 Posted July 14, 2013 Report Share Posted July 14, 2013 well depending on some circumstances.......it could be your fault or it could be the builders fault. 1) just cause the electrode is missing off of your plug....doesn't mean it shattered off........if things get too hot, they will also melt off. 2) it may HAVE broken off.....but then you have to wonder why.....if it did break off is detonation the culprit. 3) if detonation is the culprit.......are you running a high enough octane fuel to ensure detonation is not a possibility. There are alot of different things to look into here. My guess is that you didn't have enough octane and you detonated the motor so hard that things broke. Did your builder tell you what kind of fuel to run? What was your compression? What is your elevation? 22cc domes on a 4mil can jump the compression up pretty quick and can be higher than what pump fuel can support.... Quote Link to comment Share on other sites More sharing options...
Tedder Posted July 14, 2013 Report Share Posted July 14, 2013 Possible but slim chance that you actually had a plug break off. Most likely detonation. Porcelin is tough on internals so you'll find some sort of damage from this. If your lucky just the crown and dome will be effected. Be sure to check the squish when re-assmbling and once it's back up and running spend some time tuning. As Jereme asked, What elevation and octane? Quote Link to comment Share on other sites More sharing options...
Nieskes Posted July 14, 2013 Report Share Posted July 14, 2013 Take a light and look at the top of the piston is it messed up? The chances it got to bottom of the crank is slim, It probably just blew out the exhaust port. The plug could have been dropped prior to install, then just came apart after some use. Do some checking your self before you take talk your "Mechanic" Quote Link to comment Share on other sites More sharing options...
m671054 Posted July 14, 2013 Report Share Posted July 14, 2013 Why wont it fire? you have spark? do a comp test. maybe you got a stuck ring from the porcelan but i would think it would run on 1 cyl. air leak coulda caused it to lean out as well. most likely not builder issue. Quote Link to comment Share on other sites More sharing options...
Zillaguy Posted July 14, 2013 Report Share Posted July 14, 2013 take the head off and inspect it for yourself... Quote Link to comment Share on other sites More sharing options...
Dino Posted July 14, 2013 Author Report Share Posted July 14, 2013 After the replies I'm not quite sure but I believe detonation was the problem. Yesterday I put in pump gas 93 with Klotz 32:1. I asked my builder when it was done if I could use pump gas and he said yes. I asked what the compression was at and he said probably 125. So he did not check the compression I believe. I'm going to his shop today and see what's going on he was supposed to pull the head and check the damage. I'll let you guys know what the culprit was.. Thanks for all the replies. Quote Link to comment Share on other sites More sharing options...
Nieskes Posted July 14, 2013 Report Share Posted July 14, 2013 The head is only 10 nuts, there is no need to take it to a machanic. Quote Link to comment Share on other sites More sharing options...
Dino Posted July 14, 2013 Author Report Share Posted July 14, 2013 Your right even though I have limited mechanical skills I could have took the head off myself. I was just pretty pissed yesterday when I only got to run it for 2 hours and it broke down so my first thought was take it back so I had already took it there yesterday. My builders a good dude and I'm sure he will figure out what happened and get me running again . Quote Link to comment Share on other sites More sharing options...
J-Madd Posted July 14, 2013 Report Share Posted July 14, 2013 What did the other plug look like? Quote Link to comment Share on other sites More sharing options...
Dino Posted July 14, 2013 Author Report Share Posted July 14, 2013 When I first started riding I stopped and checked plugs and both were golden brown then afterwards the one plug almost all of the insides of the plug were gone except a little piece and the top electrode was fine as far as the other plug it was completely black and dry Quote Link to comment Share on other sites More sharing options...
Dino Posted July 14, 2013 Author Report Share Posted July 14, 2013 Just got a call from my builder and the damage is I need a new cylinder, piston and dome. Not what i wanted to hear. As to the cause my builder said it was for sure detonation but due to what I still don't know.. thanks for all your replies I hope to be back and running next weekend and hopefully for more than a few hours.. Quote Link to comment Share on other sites More sharing options...
Nieskes Posted July 14, 2013 Report Share Posted July 14, 2013 Make sure he shows you everything before you let him buy you parts. Have the "mechanic" figure out your compression ratio also not just the kicking compression. 1 Quote Link to comment Share on other sites More sharing options...
Pastrykiller Posted July 14, 2013 Report Share Posted July 14, 2013 Well the builder should foot the repai build if he said it was detonation. He built it, his calculations, his advice, his problem. Unfortunately, the cost will be on your side and he will prob just write off the labor. Your call. Quote Link to comment Share on other sites More sharing options...
sheerider11 Posted July 14, 2013 Report Share Posted July 14, 2013 I asked what the compression was at and he said probably 125. Remember that??? That's his fault if it detonated its self to pieces. Unless you put some shitty gas in or cranked the timing up Quote Link to comment Share on other sites More sharing options...
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