after re-jet?

[gilroy222]

ok well i have a drz250 and i recently got an FMF powercore 4 slip-on put on it and it needed to have the main jet increased and whatever else so i got it done,now before i got it done it had this slight bog after it had been running. now i just got it back after having it re-jetted and the power output was insane but after riding it wide open in 6th on the road for like 10-15 mins(not for that long like i stopped every so often) and the bogging came back,the power was still there and the bog wasnt as big as before but u can definitly feel it and hear it. So what I am wondering is would this have something to do with the engine being hot from going wide open? or is it just cuz once you get it re-jetted it has to break in again?

oh and also i did have dirt in the tank but i cleaned it out before i rode it so it shouldn't be the dirt.

[wr250f95]

wide open is harsh on an engine, Im not sure it thats the source of your problem though.

[gscx]

well your float bowl will run out of gas in it afetr a certain time, and the pumps that 4 stroke carbs use only hold so much gas each time they work, they have to fill back up after a wide open run, so afetr you let of of it after doing this and then crack open the throttle imeadiately after it will bog, but i think the DRZ 250 is air cooled? but that is no good for wide open runs. it is hard on a engine. have you checked the valves lately?

[gilroy222]

Originally Posted by gscx

well your float bowl will run out of gas in it afetr a certain time, and the pumps that 4 stroke carbs use only hold so much gas each time they work, they have to fill back up after a wide open run, so afetr you let of of it after doing this and then crack open the throttle imeadiately after it will bog, but i think the DRZ 250 is air cooled? but that is no good for wide open runs. it is hard on a engine. have you checked the valves lately?

no its air/oil cooled, but yeh it makes sence that it takes a minute for the pump to get gas in the motor,and acctually today after i would go wide open i would wait a second before hitting the throttle and it was fine.

[turtlemann14]

sounds like it could use a high flow float needle and lines (they don't make this to my knowledge...)

[gscx]

they do make needles with sharper tapers and this lets more gas into the mixture, they come with jet kits.

[turtlemann14]

into the mixture or bowl?

[gilroy222]

well is this common in all 4-strokes cuz all my friends have 230's and i don't think their bikes bog out?? same with my friends dr200 it doesnt bog out either after going full out,and mine has been doing it ever since i can remember,even before i got the pipe on it. it's sort of getting to be a pain in the ass(pardon my french) because wen i go to pull a wheelie it bogs and then pretty much no wheelie. after the bog though it's like all the power comes right back but still. However it doesn't bog wenever i take off shifting like 1,2,3,4,5,6 it doesnt bog at all but then wen im shifting down and go to rev up it does it and even like a minute or two after i was done going wide open it still does it until i shut it off and turn it back on after. but also i was wondering if it would be an air issue and if a more higher flow air filter would do it but maybe not. becuase wen i got my bike jetted after i got the pipe the mechanic said the pilot jet was probly a little lean causing the bog after its warmed up. but w/e i dunno

[wr250f95]

if its bogging, most likely pilot jet, IM unsure of whether or not you have an ap