racin69z

It was a really good time even though I never got the banshee on the sand. Lots of cools vehicles to watch. We are planning a trip back, but now we want to take our trucks, and sxs, and bikes, so I need a semi truck and trailer lol. I was unaward of the requirement for richer jetting, I appreciate the heads up. I am not sure why the oring let go. The head was on the bike when I got it. It is a pro design head and the domes are in pretty rough shape. I am ordering another set of domes and will go from there. Right now, it has 21cc domes. They cylinder has been ported, raising the exhaust port a bit loosing some compression. With it only cranking at 130, I am considering going to a 20 or 19cc dome to get closer to 150 psi. From what I have read, 150 seems to be the cutoff for pump 93 octane.

I fooled with it last night, and figured out that the cool head o ring was leaking combustion pressure into the cooling system on the left side. Thanks for the suggestions

I am at work today, and cannot get the carbs off to get the current settings. The thing that is wierd to me is why the left side isn't running correctly, when the right is. The cylinders have almost identical cranking compression and leakdown. I am back home now where i jetted the bike to run originally. I have a decent understanding of jetting, no where near an expert, but most of my experience is with Mikuni round slide carbs, so at least that is good. The 2 stroke end of it is fairly new to me. I was going to put a scope down in the plug hole to look at the tops of the pistons and see how the crowns looked, but haven't had a chance.

I have a 2003 banshee that I just went through. New 64.25 pro x pistons fresh bore, midrange porting, fmf Fatty's, 19cc? (I think} cool head 130 psi compression, stock carbs pod filters with what I thought was optimized jetting for the combo. I think I am.at 330 main 35 pilot but I'd have to check. The thing was running great other than a hard first start of the day. Drive 600 miles to silver lake sand dunes ORV, and I won't even pull itself up the sand road to the dunes. Elevation is only 300 ft more than home, so I don't think that's enough for a major jet change. The right side plug is clean, left side plug gets wet. By feeling the exhaust output when I rev it, I can definitely tell the left side is not running as good as the right side. And the left side pipe doesn't get as hot. But it sounds like it's running on two cylinders and idles fine, just makes no power. Both cylinders have the same compression, right has 2% leak down, left has 3%. I don't think that's too far off. Reeds look good, Carb jets and passages all seem to be clear and open. I swapped plug wires side to side and there was no change. I am considering swapping carbs to see if the problem follows the carb, but otherwise I am out of ideas. Does anyone have any ideas?

I started in crocs initially and that was a bad idea. Then switched to work boots, but my foot was already pissed by then. My bike only has around130 psi compression right now. I was checking compression when the foot problem started.

My bike came with what I think is a modquad billet kick starter. I have never had a banshee, so i don't really know what to expect, but kicking this thing is tearing up the arch of my foot. My right foot has had 3 broken bones in it, and is pretty sensitive to stuff. The kick start mechanism feels awkward to me. The motorcycles that I have experience with are much easer to kick. My bike doesn't have heel guards installed right now, just stock style foot pegs. I have size 13 feet, I feel like i have to kind of guide my feet down through the small gap when I kick it, and my calf is always banging the fender. I guess its part of putting a motorcycle engine on a quad. I ordered a stock style kick start assembly and it is supposed to arrive this week. I may have to fab something up that has a little more surface area if the stock style one doesn't work out. The one i have looks like this. Anyone have any suggestions or insight, other than not being a puss?

I tried this and the float seals up just fine with just the spring pressure on the needle tip, but screw the bowl on and it leaks. I tried swapping things from left to right, and nothing seemed to work. Probably had it apart and together 20 times today. Took it back apart, polished the seat again, put a new seat o ring in. Still leaked. Drained it, and tapped the bowl with a ratchet while it filled and it stopped leaking...at least for now. I am really puzzled as to what is going on. I have never ran across this before and I fool with this stuff a lot.

I have a 2003 Banshee with the OEM Mikuni carbs. I cannot seem to get the right side carb to not overflow out of the overflow/drain on the bottom of the bowl. I have tried new needle, new seat, old used needle and seat, tried the q tip polish trick, new o rings on the seat, new float, different float height settings and nothing seems to help. I verified that the drain screw on the bottom is sealing. I've never had this problem before. The left side carb seals up just fine. Anyone ever see this or have any ideas? One thing I haven't tried is a new or different float bowl, I am going to try that tomorrow morning. I am about to get aggervated at this thing