My jetting

[SAVAGE420]

Well im at a stand still for now...last friday i was runnin 155 mains and it was running great..than on sunday ..it was a bit warmer out and my quad ran like shit all boggey and couldnt get WOT at all from 1/2 throttle up , so i through some 152's in and that didnt help at all ...so i went and put some 150s in, again nope Nothin... so i though wtf and thorugh some 145's in and stll it didnt change..mabey just slightly....so with my mods in my sig and the altitude i usually run is 1500 ft and up and the temp is mid upper 70's dose it look like i will have to go lower on the mains and raise my clips one notch..just seems like if i have to run some 140's or 135's seems Very low to me and with just a temp change of 10 degrees or so would fuck it up this much hummmm...what do you think im usually pretty good at jetting just this time in at a loss....here are some pics of one of the plugs. So dose running a lower jet like 140-135 sound very low to you guys?

http://i27.photobucket.com/albums/c1...0/Stuff020.jpg
http://i27.photobucket.com/albums/c1...0/Stuff019.jpg
http://i27.photobucket.com/albums/c1...0/plugs004.jpg
http://i27.photobucket.com/albums/c1...0/plugs003.jpg


Ps i also put in all new gaskets from the reeds back...and theres no leaks or nothing with only mabey 15-20 hours on the new motor!

[erik6767]

that plug looks like your bowl i bet savage!! hahahah

lean that bitch out
maybe u had some air leaks before u sealed up your intake track... so ur runnin way rich?
maybe like u said, try raising the needle clip 1, lean it out a bit

[swrbansheeboy]

if it ran good with the 155's before than i would say you have something bigger going on than jet's. even if you had an air leak and fixed it, our 350 bike with t-5's/coolhead with 18cc domes/k&n's and 28 pwk's run's 152's. with a 404 kit and 30's i wouldnt go any lower than a 150 and if it's still running like ass i'd start looking at other thing's. are those the same plugs you were running before it started running like ass or were those fresh plugs you installed after it started running like shit? even a 150 sound's lean for your setup to me. just an opinion

[SAVAGE420]

Originally Posted by swrbansheeboy

if it ran good with the 155's before than i would say you have something bigger going on than jet's. even if you had an air leak and fixed it, our 350 bike with t-5's/coolhead with 18cc domes/k&n's and 28 pwk's run's 152's. with a 404 kit and 30's i wouldnt go any lower than a 150 and if it's still running like ass i'd start looking at other thing's. are those the same plugs you were running before it started running like ass or were those fresh plugs you installed after it started running like shit? even a 150 sound's lean for your setup to me. just an opinion

Ya i was thinkin anything under 150 wouldnt be right, and those plugs have mabey 30 mins on them after it started running like shit... carbs have proly 10 hours on them. Im almost thinkin my spark is weak cause it ran like shit even with the 145's in...i will have to check my spark and All the electrical tommorow....im hopping its just my coil or some shit like that...ill narow it down in the AM and see whats up cause i NEED to ride this weekend and bust the balls of my 4 stroke buddys some more...ill keep yo holmes posted. Whats a new coil run a nigg?!? And to make things worse i have no nuggs for after work right now ...DAAAAAAAAMN

[SAVAGE420]

Ok so i checked my spark and it dosent look to great....if you can see in this lil clip theres a very faint orange spark....hummmm so what do ya figure is wrong ,coil?, timing? they want 140 for a coil at the yamaha shop here....whats my options here? As im pretty sure its my damn coil.

http://s27.photobucket.com/albums/c1...rkcheck002.flv

[flotek]

any atv or MC mechanic would surely agree your plug is beyond rich looking ,but surprsingly the main is probably damn close and i say that becuase you probably didnt do a proper plug chop and allowed it to idle and pussy farted around causing it to load up and makes it look richer than it actually truely is.a 155 is roughly a 310 in a mikuni which is probably just a tad rich for your mods id say you should be close your jetting ..should be somewhere between 150 152 or 155 ,i think your plugs are fouled ,they look terrible and way loaded up with carbon .a shitty fouled plug wont spark for shizzle but theres a possiblity a bad coil or stator too or the plug cap wire needs trimmed back and thats why it is running like ass ,id set the mains at 152 get new plugs... not b8es either get the B8eg platinum plugs and see if that spark is a strong whitish blue kernal oh and get fresh premium fuel ,good high quality premix oil @40-1 ratio and clean your air filter then report back ,personaly i doubt its your main jets .....

[SAVAGE420]

Originally Posted by eviltwin

any atv or MC mechanic would surely agree your plug is beyond rich looking ,but surprsingly the main is probably damn close and i say that becuase you probably didnt do a proper plug chop and allowed it to idle and pussy farted around causing it to load up and makes it look richer than it actually truely is.a 155 is roughly a 310 in a mikuni which is probably just a tad rich for your mods id say you should be close your jetting ..should be somewhere between 150 152 or 155 ,i think your plugs are fouled ,they look terrible and way loaded up with carbon .a shitty fouled plug wont spark for shizzle but theres a possiblity a bad coil or stator too or the plug cap wire needs trimmed back and thats why it is running like ass ,id set the mains at 152 get new plugs... not b8es either get the B8eg platinum plugs and see if that spark is a strong whitish blue kernal oh and get fresh premium fuel ,good high quality premix oil @40-1 ratio and clean your air filter then report back ,personaly i doubt its your main jets .....

Those were brand new plugs with mabey 1/2 hour on them and i plug chopped the same way i always do....warn it up nice, WOT for a lil while up a gradual grade hill...hit the kill and pull in the clutch and leave it pinned and then coast to a stop is the way i do it....(is there a better way you recomend? Anyway those pics of the plugs were just after i did the chop and theres barely and spark at all. Is there a way to check the coil to see if its working up to par? I put the 152's back in a few minutes ago and it fired nice and reved nice just sitting there but then i take it for a rip and once theres a load on the motor its all boggey from about a 1/2 throttle up...this is gay HA!!! Which plugs are those you recommend man? And how do i trim the plug caps and what not? What do you think my problem is....should i get another coil on ebay to see? Thanx.

[flotek]

okay that changes things if those are new plugs and yo udid it right ,the jetting isnt it IMO ,seems to me yo u have an electrical issue ..id test the coil and test the stator ,check the timing ( flywheel key too ... they(plugs) shouldnt be that bad they arent firing right

[SAVAGE420]

Originally Posted by eviltwin

okay that changes things if those are new plugs and yo udid it right ,the jetting isnt it IMO ,seems to me yo u have an electrical issue ..id test the coil and test the stator ,check the timing ( flywheel key too ... they(plugs) shouldnt be that bad they arent firing right

Yes im sure now its not the jetting cause it couldnt be that off over night...anyway i think your right on the electrical issue but how can i check the coil and stuff?

[flotek]

check out the manual section for testing the electrics