someone82

I had a feeling the br7's might have been part of the problem. (But left cyl was fine, no signs of detonation and the plug was good) I ran them because of my rich oil mixture to help burn off extra carbon deposits (did this in some of my rotory motors). How sensivtive are two strokes to plug heat ranges? Yes it was the right cyl and I don't know about the crank seal, I haven't pulled the case apart yet and i never did a leak down on the motor before hand, only compression tests. I just remebered tho, when I drained the oil from the tranny I had a slight "pressure release" sound? :shrug: thanks again, matt

To start off this forum is great! I want to thank all you guys for all the great information I've gotten on this board it's really helped me learn about the banshee and 2 strokes in general. But now it is time for me to ask for some help. This weekend I took my banshee for her first real ride up (bought the quad last month) at gorman and she was running great for the whole first ride, up untill some water got into the carbs (running pods). The motor tried to hydralock on me but I was able to keep it going; I cleared her out and she was fine again. Rode it for another 30 mins and got back to camp. We took about a 30 min break and I told my buddy to take her for a spin (he was pissed that I was out running his raptor). He didn't get more than 100 ft from camp when he shifted into second and it just died. He tired to kick it over but it locked up. Once I got it home I noticed the right spark plug was backed out about half way so I pulled the head off to discover the crown of the right piston beat to crap. Pulled the jug to find the intake side of the piston skirt to be completely gone. Pcs of the piston were wedged in between the crank and the case, being the cause of locking up the motor. Surpriselinly the sleeve took no damage at all! By the way the left cylinder was fine. Long story short I can tell my right cylinder was running hot/lean but I never had any indication of it while riding (motor was smooth and had plenty of power. What does 2 stroke detonation sound like?). What should I look for what might have caused this. I noticed on the bottom side of the jug the rubber plug (what is the purpose of this?) that goes into the water jacket was torn to pieces (possible air bubble in the water jacket?). Here are my specs: 96 banshee, the motor was rebuilt (before i bought it with really no hours on it) with wiseco 64.5 pistons, jugs have a mild port, klein pwk 28's w/ pod filters (don't know the jetting yet), reed spacers, boyeson reeds in stock cages, stock head milled .020, ngk iriduim BR7EIX plugs (had a nice chocolate burn on the plugs, maybe too hot of a plug?), and toomey t5's. Stock timing and cdi. 32:1 91 oct fuel mix w/yamalube. I myself had the head milled (motor had a bad head gasket on it when i got it) and put in the reed spacers (for clearence) and checked for air leaks, but never found any. Also before this the cylinders had 145 psi even. thanks, matt if you guys want to see pictures i can get some up tonight.

I forgot to add, but I'm running K&N pods too.

I recently purchase my first banshee ('96) and man did i forget how much I love 2 strokes (I used to ride a kx250 but now i've been playing on a raptor 700r). The motor had been rebuilt right before I bought it; with a mild port, boyeson reeds, toomey t-5's, and pwk 28's. I added reed spacers so the overflow's would clear and milled the head .020 (compression test: 145psi) and it's still stock bore and stroke. Oh and it's got a stupid boost bottle on it which i need to get rid of. Anyway it's got a slight bog right off the line and I just want to get this puppy dialed in. It runs like a raped ape tho when you get it on the pipe, I am running rich just from checking my plugs (close to the point of fouling). Last I live down at sealevel here in ventura, ca but I primarly ride up at gorman and i'm running 32:1 yamalube with 91. Whats in the carbs, i don't know I haven't had the time to pull them apart, so any starting advice would be awesome. Just from reading other posts, this has been one of the most helpful boards i've ever been on. Thanks, Matt