FZRSupport: the FZROnline Archive

carbs are synced and fuel lines clear... its jetted right i think but i v tried different pipes anyways and it still seems to be running rough. im to the point that im gonna get a o2 sensor and a/f guage and mount em just to be sure i dont melt sumthing running too lean. i need help.... everything else is cherry on it mechanically but its kind of a rat bike cosmetically... i need to be on the road asap. spring is comin fast here in san antonio and i have lots of rallys to go to.... i sell and install fuzion led light kits out of my backpack. im damned good to. last season i would take a truck and trailer show bike etc..... bullshit. it costs too much money. doin it the cheap way this season to see what happens. i need this bitch runnin right now...

210 were you at? im from SA. went to school at holmes. anyway, give me some more info on the problems? no you cant put a bandaid fix on the problem, you have checked all the obvious right? air leaks, spark plugs, fuel pump? put the stock shit back on it if you have to! got a full exhast or slip on? for full exhaust your gonna need to richen it up alittle, bout 2 sizes up for your mains. sorry dude but tuning these carbs aint quick and easy its a real bitch. cause you got mains needles and pilots you have to worry about. but if you do go the sensor route you will be able to find your problem real quick, but im not so sure its worth all the money to do. reply with some more details and well get back to you. oh and just incase, john jay SUCKS!

Synch/tune the carbs...do a search on how to do it.

Good talk

I went to holmes in 00 for about a year and a half... got booted for skipping, transfered to thomas jefferson... i live like a block from the high school now... i bought the bike like this. its got a slip on and i think it has headers, not sure. and dual k&n pods on top of velocity stacks. it hesitates on initial launch then runs good till about 7k where it acts like its running out of gas. if i let off a little then nail it it punches right through till about 10k where it does the runnin outta gas thing... i think it might be my fuel pump... what can i do about replacing it? isnt it self regulating or sumthing???

oh and also. it runs alot better with less fuss the hotter it is outside...

your jetting is all outta whack, you need to richen it up. when its cold the engine gets more oxygen which means more fuel is required to keep things right. when it warms up you loose air density so your need for fuel goes down. you got mods that open up the breathing potential, and the carbs are probably still stock with stock jetting. if you synced these carbs sounds like you should have the general knoledge to be able to handle this job. how many miles on it? might be due for a valve job aswell. nah it aint the pump, if its making its noise when you turn the key and then stops, it is building up its prime and works fine. try to find a jet kit for the bike, alot of kits are mod specific so you should be able to find your kit pretty easiely. what is it, uh motion pro i belive is what its called, it gets preached here alot. check out there website. thomas jefferson eh, what year did you graduate? i workd at ingram park mall at the mcdonalds, good times

i didnt grad.... was supposde to in 05 or 05. dont really remember. started my own buisness and said f*ck school.... kinda wish i hadnt tho but oh well.. cant change the past. the pump work good. checked it today. gotta be the jets like you said. first clue was the increase in power when i put a stock style slip on her. too many bolt on mods not enough tuning... treated it like a f/i bike.... i got it off a black dentist for 800 bucks so that kinda shit is expected... im ordering a factory pro jet kit with new needles, bowl screws, and emulsion tubes. that should do the trick. plus while im at it im gonna do that dual coils upgrade thets onn the mods section here... already picked up some good coils from the junkyard. and yes i tested them with a multimeter before i paid 4 it.

i meant to put 04 or 05...

fazersteve210 wrote:i didnt grad.... was supposde to in 05 or 05. dont really remember. started my own buisness and said f*ck school.... kinda wish i hadnt tho but oh well.. cant change the past. the pump work good. checked it today. gotta be the jets like you said. first clue was the increase in power when i put a stock style slip on her. too many bolt on mods not enough tuning... treated it like a f/i bike.... i got it off a black dentist for 800 bucks so that kinda shit is expected... im ordering a factory pro jet kit with new needles, bowl screws, and emulsion tubes. that should do the trick. plus while im at it im gonna do that dual coils upgrade thets onn the mods section here... already picked up some good coils from the junkyard. and yes i tested them with a multimeter before i paid 4 it.

FS2,
DO NOT put the coils on until the carb business is sorted ! adding another variable that may be wrong will give you a MAJOR headache.

You say the bike has dual pods on, are they fitted directly on the carbs or on top of plastic tubes between them and the carbs.

If direct mounted that is a source of problems if mounted on a tube of some sort THAT tube has to be the exact same length as the original carb to air box rubber tube + 1/2" - 3/4" .(this extra length is for you to clamp the pod on )
The idea is that the start of the pod is where the start of the air box was so you keep the inlet tract as designed for the engine.

Pods are not impossible to tune but are time consuming adding pods & tubes is FAR easier.

i have stainless pipes with silicone couplers spacing the pods off the carbs so thats not the problem.... strange thing is now that the temp here in texas is starting to pick back up the problems are vanishing.... dont know if its the air temp/density thats doing it, or im just imagining this crap...

It's entirely possible that the bike is jetted perfectly for a hot Texas summer, so when you get the cold (denser) air, it runs lean. I recommend that you wait to see how it runs when the air temp is warmer before you decide to rip the carbs apart and "fix" what may be a perfectly functioning warm-weather bike.

thats kinda what i wanted to hear. thanks.