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Posted

Hey guys, I descided to stop dumping money into my bike and spend a little cash on the shee. My friend was parting out a semi-complete banshee that he acquired on a trade. I got a set of stock carbs with the tors removed and a set of UNI pod airfilters (the ones that clamp on the back of the carbs, no airbox) with outerwears. I also thought it might be cool to give a twist throttle a try so I purchaced a twist throttle and cable.

 

My set up before the carbs and the filters was as follows: Bills Pipes/Silencers, V-Force 3 reeds, Pro-Flow filter/clamp, 280 main jets, 32.5 pilots, and the clip on the needle was in the center notch. The jetting was spot on, prefect coco brown plugs, no bogging, hesitation etc...

 

I took off the airbox and the old carbs and proceded to put the carbs and filters on that I purchased. I figured that I would have to compensate a little on the jetting for the increased airflow from the pod filters so I threw 290 mains and the 32.5 pilots in to see how she would run. After I got the twist throttle and everything installed and adjusted I started it up and took it for a ride. The quad ran EXTREMELY rich at all throttle positions. Blue smoke everywhere and fouled plugs by the time I went down the alley and back. So, I took the 290's out, put the 280's back in, changed the plugs, and took it for a ride. It was better, towards 3/4-full throttle but it was still rich and bogging realy bad in the lower RPM ranges. So, I this time I put in the stock 25 pilots and a new set of plugs and took it for a ride. The lower RPM/throttle bogging improved quite a bit but it was still running on the rich side and blowing alot of smoke. So, back into the garage she went. This time I bumped the needles down one notch (now the clip is on the 2nd notch from the top), played with the air screws, and took it for a ride.

Now there is only a slight bog when you first try to start the quad or try to pull out. It wont idle, you can tell because its too rich, and it is still blowing a little more blue smoke than normal, but its rideable.

 

Well, I was sick of working on it so I took it out on a Saturday going on a normal trail/hillclimb/haul road ride like I usualy do. Half way through the day I found myself hitting reserve and having to fill up my gas tank. Before this whole jetting ordeal I would be able to ride all day Saturday and maybe for an hour or 2 on sunday on one tank of gas.

 

The first thing that baffles me is how the quad would run so rich after I put the pod filters on. Increased airflow would mean you need bigger jets correct? The second is the gas mileage. I know it was running a little rich, but to cut my gas mileage nearly in half seems a little crazy. Can anybody give me any insight as to what may be causing these things? It just doesn't seem right that when I put a more free flowing airfilter set up my bike all of a sudden ran extremely rich. Thanks!

Posted

does anybody have any ideas??? It doesnt seem right to me that the stock size pilot jet seems too rich for my setup. is there anything else i can mess with or adjust? any suggestions are appreciated. Thanks

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