Bandit Posted March 1, 2007 Report Posted March 1, 2007 sounds kinda like there is bb's in the exhaust or head. Quote
Bandit Posted March 1, 2007 Author Report Posted March 1, 2007 has anyone ever heard of that before? It starts up and runs, but it just sounds like a tinging sound Quote
blowit Posted March 1, 2007 Report Posted March 1, 2007 has anyone ever heard of that before? It starts up and runs, but it just sounds like a tinging sound Um, that motor is toast! I am an engine builder and it sounds like a failed rod bearing and your piston is "tapping out" or hitting the head. This noise is also heard when the skirts break off a piston and bounce around in the crankcase. Either way, roll out the check book. Brandon Quote
FireHead Posted March 1, 2007 Report Posted March 1, 2007 Um, that motor is toast! I am an engine builder and it sounds like a failed rod bearing and your piston is "tapping out" or hitting the head. This noise is also heard when the skirts break off a piston and bounce around in the crankcase. Either way, roll out the check book. Brandon It sounds like a rod/crank bearing or a broken piston. Quote
Bandit Posted March 1, 2007 Author Report Posted March 1, 2007 would it still fire up and run fine? Quote
Bandit Posted March 1, 2007 Author Report Posted March 1, 2007 its a lt50...and it has that Ctracing mod, i put it all together and a new piston and rings. ctracing link they recommended 110 octane gas. I did the break in period they recommended and rode it for 30 min and it died...when i started it back up it has that noise. Quote
Bandit Posted March 1, 2007 Author Report Posted March 1, 2007 i have one of them temp guages you point an shoot....right before it shut down it read 380 degrees...i was shooting the cylinder. Quote
yamaha04 Posted March 1, 2007 Report Posted March 1, 2007 i had this same sound in my banshee after it got stolen and i got it back the next day. ran all summer without a problem but was getting more harder to start by the end of the season. when i tore it down i found that one of my pistons was loose in the bore and i could move it back and forth alittle and it would make the bb sound i was hearing. Quote
Bandit Posted March 1, 2007 Author Report Posted March 1, 2007 i guess we will find out if it holds together on saturday, He has a race. I just wonder if it overheated? Quote
blowit Posted March 1, 2007 Report Posted March 1, 2007 i guess we will find out if it holds together on saturday, He has a race. I just wonder if it overheated? Listen, I would NOT ride it until I knew what was going on. It IS going to pop if it is "knocking" for attention. If you engine is calling for 110 race fuel and you put pump fuel in it, that could be fuel knock and it is not to be ignored. Knocking can put holes in pistons, kill rod bearings and more. I can't honestly remember if that bike is air cooled but if so, overheat is doubtful however, 380 is HOT!! I would check that temp meter. You need to do a compression test and if you don;t have 130+ in that motor, you don't have a motor. Sounds like your rings may have welded to the piston and you have piston slap. This is common in overheating. Either way, I would not race it. JMO Brandon Mull Engineering Quote
Bandit Posted March 1, 2007 Author Report Posted March 1, 2007 Im going to take it apart tonight and see what it looks like. Quote
Bandit Posted March 2, 2007 Author Report Posted March 2, 2007 nothing is bent or broke but i found the dome looks like its flaking :shrug: Quote
FireHead Posted March 2, 2007 Report Posted March 2, 2007 nothing is bent or broke but i found the dome looks like its flaking :shrug: That sort of looks like you have been having some piston to head contact. Is that flaking carbon deposits or metal? Quote
Bandit Posted March 2, 2007 Author Report Posted March 2, 2007 the head or piston dont have any marks of them hitting each other.I dont know if its the casting imperfections with carbon in the cracks to make it visable, or if it the aluminum flaking. But you can feel it. It feel rough when running finger across it. Quote
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.