My project bike: it just got uglier.
- Thread starter Bio248
- Start date
Bio248
DUI BABY
Re: My project bike: *UPDATE* it runs!!
i lied. the bike ran like crap so i got frustrated and tore it apart again. it was running SUPER rich (>10.0 AFR) and the vent tube that goes from the carbs to the gas tank was clogged...not the gas tank vent tube..
i also drove it to the gas station to fill it up with the straight exhaust. it sounded absolutely horrible so i put the muffler back on. sounds much better now.
pictures and video to come tomorrow, promise.
i lied. the bike ran like crap so i got frustrated and tore it apart again. it was running SUPER rich (>10.0 AFR) and the vent tube that goes from the carbs to the gas tank was clogged...not the gas tank vent tube..
i also drove it to the gas station to fill it up with the straight exhaust. it sounded absolutely horrible so i put the muffler back on. sounds much better now.
pictures and video to come tomorrow, promise.
blowfishRus6
New member
Re: My project bike: *UPDATE* it runs!!
on the bottom side of the gas tank?? is it a reserve line??? if it was a one way connector they sell something like it at petsmart or something. anti syphone for air lines, like 50 cents, thats if it would work for gas, if thats what its for.
wait did gas run thru it or was it just a vent line???
on the bottom side of the gas tank?? is it a reserve line??? if it was a one way connector they sell something like it at petsmart or something. anti syphone for air lines, like 50 cents, thats if it would work for gas, if thats what its for.
wait did gas run thru it or was it just a vent line???
Bio248
DUI BABY
Re: My project bike: *UPDATE* it runs!!
here we go...
so i am having a little confusion on how this bike is supposed to run and why...
let me explain. i have been having issues with my bike getting starved of fuel after riding for a little while and dying. gas tank had a woosh when i opened it up and i was lead towards the gas tank vent (thanks, pete). i cleared out the vent in the tank with a little blast of air and it seemed like i fixed the problem. however, i started riding it again and it still happened to me. my solution: reached under the gas tank and pulled the vent line that connects to the carbs and at least the bike ran okay and didnt die on me. i got home and tore it apart and found a few things out.
let me help explain so everyone is on the same page. this port is on the back of the #2 carb, throttle side:
this is the line that connects to it:
and this is the port that it connects to on the gas tank:
now, onto my situation. i decided to pull the lines apart since the tube that connects the carbs to the tank is two pieces, with a smaller plastic piece in the middle of the two which i have been lead to believe is a check (one way) valve. i found this to be my restriction in the system and decided to blow out the tubes to clear them of any blockage. however, when i got the compressor out i decided (accident) to blow the check valve out into the street and not be able to find it. i decided to call it quits for the night and went inside.
today i picked it back up, went to the store and bought some tubing to connect the two and hope for the best. here is what i found out today. with the tube hooked straight up to the gas tank the bike wont even run. with the tube disconnected from the gas tank, hooked up to the carbs, and left open to the atmosphere the bike runs, but fairly poorly (it idles really low and lean). when i put my finger over the tube and close it off the idle levels out and it runs how it should. the tube is pulling vacuum because it sucks my finger into the tube.
this leads me to believe that the check valve is set up to let air to the tank, but not from it. can someone help me figure out how this is supposed to be setup and work? why would the gas tank ever need pressure and how would the bike ever produce any pressure? would this be for when going WOT that the tank would be pressurized from the top down allowing it to make sure it doesn't starve of fuel? hopefully someone has the knowledge to give some solid input because so far i've got absolutely nothing.
help me!
here we go...
so i am having a little confusion on how this bike is supposed to run and why...
let me explain. i have been having issues with my bike getting starved of fuel after riding for a little while and dying. gas tank had a woosh when i opened it up and i was lead towards the gas tank vent (thanks, pete). i cleared out the vent in the tank with a little blast of air and it seemed like i fixed the problem. however, i started riding it again and it still happened to me. my solution: reached under the gas tank and pulled the vent line that connects to the carbs and at least the bike ran okay and didnt die on me. i got home and tore it apart and found a few things out.
let me help explain so everyone is on the same page. this port is on the back of the #2 carb, throttle side:
this is the line that connects to it:
and this is the port that it connects to on the gas tank:
now, onto my situation. i decided to pull the lines apart since the tube that connects the carbs to the tank is two pieces, with a smaller plastic piece in the middle of the two which i have been lead to believe is a check (one way) valve. i found this to be my restriction in the system and decided to blow out the tubes to clear them of any blockage. however, when i got the compressor out i decided (accident) to blow the check valve out into the street and not be able to find it. i decided to call it quits for the night and went inside.
today i picked it back up, went to the store and bought some tubing to connect the two and hope for the best. here is what i found out today. with the tube hooked straight up to the gas tank the bike wont even run. with the tube disconnected from the gas tank, hooked up to the carbs, and left open to the atmosphere the bike runs, but fairly poorly (it idles really low and lean). when i put my finger over the tube and close it off the idle levels out and it runs how it should. the tube is pulling vacuum because it sucks my finger into the tube.
this leads me to believe that the check valve is set up to let air to the tank, but not from it. can someone help me figure out how this is supposed to be setup and work? why would the gas tank ever need pressure and how would the bike ever produce any pressure? would this be for when going WOT that the tank would be pressurized from the top down allowing it to make sure it doesn't starve of fuel? hopefully someone has the knowledge to give some solid input because so far i've got absolutely nothing.
help me!
blowfishRus6
New member
Re: My project bike: *UPDATE* it runs!!
the tank will get pressurized from gas splashing around in the tank. my atv has a switch on the gas cap to keep that from happening, vent the fumes off. also on the atv the carb has a vent line (which kinda looks the same in your case)
being on the bottom of the gas tank, i dont see how that would vent out the gas, gas would come out it too would it not?? i could understand it being on the top. but maybe it is a vent line, if so, looks like its trying to vent it back into the carb. i dont really see why you need that, i would just let it run out into the atmosphere.
honestly, and i know its not the correct way, but which ever way it runs right, i would just rig it up and leave it like that, unless gas comes out of the hole in the gas tank.
the tank will get pressurized from gas splashing around in the tank. my atv has a switch on the gas cap to keep that from happening, vent the fumes off. also on the atv the carb has a vent line (which kinda looks the same in your case)
being on the bottom of the gas tank, i dont see how that would vent out the gas, gas would come out it too would it not?? i could understand it being on the top. but maybe it is a vent line, if so, looks like its trying to vent it back into the carb. i dont really see why you need that, i would just let it run out into the atmosphere.
honestly, and i know its not the correct way, but which ever way it runs right, i would just rig it up and leave it like that, unless gas comes out of the hole in the gas tank.
Bio248
DUI BABY
Re: My project bike: *UPDATE* it runs!!
well, i rode the bike in this morning to work. it idles great and pulls phenomonally up top. its still a little rich cruising and down low so i probably have to change out the pilot jets for slightly smaller ones, but up top im running 12.9-13.3 AFR and it is MEAN. pictures and video to come tonight when i get off work.
i ended up capping off the tube on the carb side and letting the tank side open to the air and the bike seems to run fine. after talking with my brother for quite a while about it the only thing we can think of that could be there would be a tiny restrictor piece or pill in order to just pull a tiny amount of vacuum on the tank for EVAP purposes. seeing as how i dont care about the environment, i dont care about a functional EVAP either.
well, i rode the bike in this morning to work. it idles great and pulls phenomonally up top. its still a little rich cruising and down low so i probably have to change out the pilot jets for slightly smaller ones, but up top im running 12.9-13.3 AFR and it is MEAN. pictures and video to come tonight when i get off work.
i ended up capping off the tube on the carb side and letting the tank side open to the air and the bike seems to run fine. after talking with my brother for quite a while about it the only thing we can think of that could be there would be a tiny restrictor piece or pill in order to just pull a tiny amount of vacuum on the tank for EVAP purposes. seeing as how i dont care about the environment, i dont care about a functional EVAP either.
blowfishRus6
New member
Re: My project bike: *UPDATE* it runs!!
do you gotta change 4 jets at a time???
here is a carb tuning write up if your intrested.
CV Carb Tuning Procedures
do you gotta change 4 jets at a time???
here is a carb tuning write up if your intrested.
CV Carb Tuning Procedures
blowfishRus6
New member
Re: My project bike: *UPDATE* it runs!!
waiting on you
waiting on you
Bio248
DUI BABY
Re: My project bike: *UPDATE* it runs!!
here you go, as requested. here are pictures of the final product:
and here is a little walk around i did, sorry for the crappy audio...my camera blows..:
YouTube - CBR 1000F Walk Around
here you go, as requested. here are pictures of the final product:
and here is a little walk around i did, sorry for the crappy audio...my camera blows..:
YouTube - CBR 1000F Walk Around
Bio248
DUI BABY
Re: My project bike: *UPDATE* it runs!!
not this weekend, but im hoping i can make it out at some point. only time will tell, but i have a feeling with how the clutch is slipping up top that i wont run fast enough to get kicked out. however, if it did stick how its supposed to the bike feels strong enough to run a 10 second pass.
not this weekend, but im hoping i can make it out at some point. only time will tell, but i have a feeling with how the clutch is slipping up top that i wont run fast enough to get kicked out. however, if it did stick how its supposed to the bike feels strong enough to run a 10 second pass.
