i put a moose jet kit in along with a uni filter a custom end cap and my machine ran great all day then at then end of the day i took the lid off to try it cause i put the stage 3 jet kit in with needle on 3rd clip down 190 main jet so i thought well ill try it like that and all of a sudden it started popping back in the box and the i notice the a little (very little)oil coming out of the crank case vent ? i started it up later on and it ran great agin till it got warm i think it to much gas but i dont know could someone help it idles and drive good going very slow but under acceleration its bad

 

come on guys can someone help i dont have any idea what it is is. would one of my plugs be fouling out? do you know it when you foul a plug when the mach has 2 for the one cylinder. any help would be appreciated i just got it less then a month ago and it has been running great till the end of the day does it sound like i over jetted ? or has this happened to anyone else what else would do this it dont smoke but my oil smells kinda gassy?

 

well i am running the dynojet kit on mine and I have either the 190 or 195 I just know I went with the biggest.. at the time I had the custom end cap and the K&N filter and it ran fine with or without the lid.. i even took the filter all the way off that mad a couple passes that the track and it ran even faster.. I dont think you over jetted... my cousins baja does the same thing... he has fouled plugs twice trying to start it and when he took his lid off the air box it poped and backfired real bad.. but just from working on cars I would think that the poping when the lid is off would be a lean condition... because you are introducing more air into the mix and it starts poping.. but that would not explain the fouled plugs.. and at least in his case when you foul a plug you KNOW IT.... once his fouled it would not start at all we pulled them out and dryed them off cleaned them put them back in and still would not fire.. we went and got new plugs and it fired right up.
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what happens when you put your air box lid back on does it run allright. if so it is to lean with the lid off.

 

it runs great either way until it gets warm now? i just dont know if maybe it fouled one of the plugs i dont get why they have 2 if i knew the way it worked a little i could almost figure it out im just thinking maybe that what it did and thats why i have gas in the oil i hope it didnt screw something up i only rode it a little while then when it started running like crap i shut her down. ill mess with it i cant imagine it being anything to serious but we`ll see i did think it ran better with no lid also it was raing today maybe i got water in the gas i dont know somethings up with it

 

Is the choke stuck on the first notch? Sometimes they are real hard to push in; I have even had to use pliers to get mine back in. If so it would run ok till it got warmed up.

 

I forgot on my wifes DS I have the dyno jet kit with the 190 and with the lid on it would run way rich. So you might have fouled the plugs. It will run with one fireing but only at low to mid RPM's cause it can't burn all the fuel at higher RPM's without both. BUT that is jmop

 

i dont think it is i can feel it click in twice

 

thats what im thinking i hope i didnt ruin it i can smell gas bad in the oil it i bet it was rich then fouled a plug it runs good and idles good it was running great but i think it would with both plugs being good should i drop down to a 185 main jet or should i put the stage 1 in it? id rather it have the 3 it i do have the six little uni filter inch hole vents in the lid anyhow, it was running good im going to try it and see and ill get new plugs for it in sometime tommorrow so ill know if its ok or not after work im hoping it is, it dont smoke or anything but my luck i pooched it, lol thank you guys, ill try everything till its fixed

 

I am going to try a 185 or more than likely a 180 in hers but I have a 50 idle jet in it and will be running the lid on. If you decide to leave the lid off the setup you have now should be fine.

Marrtoo