Scott, what is the point of extending the drain line..there is a allen bolt that prevents any fuel from going thru there unless you open it,so the "puking" does not flow from there..it blows back up from the float chamber and pours out of the carb throat..no.?? The extended hose would work if you emptied the float chamber out every time you parked the bike by opening the drain screw but that is crazy..the insulation that you describe makes much more sense..just trying to make sense of this puking thing.. MPM

nightstar57 wrote:
Scott, what is the point of extending the drain line..there is a allen bolt that prevents any fuel from going thru there unless you open it,so the "puking" does not flow from there..it blows back up from the float chamber and pours out of the carb throat..no.?? The extended hose would work if you emptied the float chamber out every time you parked the bike by opening the drain screw but that is crazy..the insulation that you describe makes much more sense..just trying to make sense of this puking thing.. MPM

Hi nightstar57, The foat bowl drain your reffering to isn't where most of the fuel drains from when the carb pukes fuel under extreem heat conditions.

When you have the air cleaner off the carb when facing carb there is a larger hose on upper left that also attaches to a metal brkt on the backside of the stock air cleaner assembly. Thats where the fuel come out of the carb when it puked fuel on my bike and my freinds 05 R* too & not the float bowl dain with a much smaller nipple/hose that requires you to loosen a screw in the float bowl to open up the float bowl drain that your reffering to. That hose comming from the upper left of carb when facing it is the hose i am suggesting you extend & run below the bike to keep puked fuel off the hot motor. But at the same time i also ran a hose from the float bowl drain below the bike too in case i ever had to drain just the float bowl.

From what i understand the place where the fuel pukes from the carb isnt a traditional drain,its some sort of pressure equilizing vent for the carb which is where the fuel comes out when the carb pukes. Then when that happens the carb blows fuel onto/into air cleaner assembly and also on the lower portion of the rear cyl & rear pushrod tube area if your lucky enough to see when the fuel 1st pukes & hits the hot motor watching the fuel sizzle & smoke white like i did with my bike looking as though it would ignite any second over 5 gals of fuel you just put in the tank.

Just like you suggest some fuel could also come out of the carbs throat too but i could not verify that with air cleaner on when my bike puked fuel,i saw it comming out of the hose i am reffering too.

Thats not a good thing esp when it can ignite in certain situations like we saw happend to someone else.

Scott

Scott,I have seen fuel sizzling on my motor..wow.!! The hose you refer to is the crankcase vent..?? I unhooked that from my airbox and rerouted it,but i dont see how gas could come from that?? It does blow out into the aircleaner case..or it did so on mine at first..and it was cold as hell outside at the time so i dont know how heat could have caused it,but in my case it was just the carb needed to be cleaned out and it was flooding..it has not happened in a long time..thankfully.. mike M.

nightstar57 wrote:
Scott,I have seen fuel sizzling on my motor..wow.!! The hose you refer to is the crankcase vent..?? I unhooked that from my airbox and rerouted it,but i dont see how gas could come from that?? It does blow out into the aircleaner case..or it did so on mine at first..and it was cold as hell outside at the time so i dont know how heat could have caused it,but in my case it was just the carb needed to be cleaned out and it was flooding..it has not happened in a long time..thankfully.. mike M.

No,its not the crankcase vent off valve cover,its the hose that attaches to upper left portion of carbs throat when facing carb with air cleaner off on my 06 silverado.

It's extreem heat overheating the fuel in the metal fuel line inbetween cyls and carb & carb float bowl that can boil the fuel into a temporary gas state . Its when the fuel is in that temp gas state that the fuel pressure in the carb/fuel lines etc increases from the fuel in that temp gas state which is just enough pressure to blow fuel by the needle & seat that isnt designed to handle that much fuel pressure in the 1st place pucking the excesss fuel out of the carbs vent to atmosphere thats located on upper left portion of carb throat when facing the carb. In some cases that vent hose may have been removed when installing an aftermarket air cleaner and it that case the that vent i am reffering to may be closed/blocke off on he carb with short peice of hose and a plug of sme sort.

Scott

Reading all this carb puke problem is scaring me and making me wonder

I have yet to have a carb puke issue with my '01 Silverado and I live in El Paso where it gets " warm " needless to say as last week in 101 degree or so weather I took a 280 mile round trip cruise while Mama was at work

Is this issue with certain year models, 1600cc or 1700cc ?

Talk to me !

Not model year specific, but you seem to either have it or not. I have had it, and it is managable.

elproadie wrote:
Reading all this carb puke problem is scaring me and making me wonder

I have yet to have a carb puke issue with my '01 Silverado and I live in El Paso where it gets " warm " needless to say as last week in 101 degree or so weather I took a 280 mile round trip cruise while Mama was at work

Is this issue with certain year models, 1600cc or 1700cc ?

Talk to me !

I live in El Paso too and used to have a 99 Roadie before I got my Street Glide a month ago.I had the puking issue occur on a hot day after riding to T or C and back one summer day and a few times sporadically since then. There isnt any reason to be scared of this issue. As you can tell from reaqding the thread it happens to different years of Roadie in different parts of the country and has to do with the fuel line running between the jugs and overheating the fuel which causes it to expand and force itself out through the vent tube on the carb. What I did to help with this problem was to put a longer piece of fuel line on the vent tube and run it out the bottom so when it did puke, it would go straight to the ground rather than onto the motor where it COULD catch fire. The other thing you can do is when you know you are coming to a stop where you are gonna shut down for a period of time, shut off your fuel petcock and let the bike idle for a little bit before you shut down. This will help consume fuel in the fuel line and keep it from overheating and puking. Just my .02.

GOOSE915 wrote:
elproadie wrote:
Reading all this carb puke problem is scaring me and making me wonder

I have yet to have a carb puke issue with my '01 Silverado and I live in El Paso where it gets " warm " needless to say as last week in 101 degree or so weather I took a 280 mile round trip cruise while Mama was at work

Is this issue with certain year models, 1600cc or 1700cc ?

Talk to me !

I live in El Paso too and used to have a 99 Roadie before I got my Street Glide a month ago.I had the puking issue occur on a hot day after riding to T or C and back one summer day and a few times sporadically since then. There isnt any reason to be scared of this issue. As you can tell from reaqding the thread it happens to different years of Roadie in different parts of the country and has to do with the fuel line running between the jugs and overheating the fuel which causes it to expand and force itself out through the vent tube on the carb. What I did to help with this problem was to put a longer piece of fuel line on the vent tube and run it out the bottom so when it did puke, it would go straight to the ground rather than onto the motor where it COULD catch fire. The other thing you can do is when you know you are coming to a stop where you are gonna shut down for a period of time, shut off your fuel petcock and let the bike idle for a little bit before you shut down. This will help consume fuel in the fuel line and keep it from overheating and puking. Just my .02.

GOOSE915 ,just wondering if you read this which i pasted below for you to chk out.

Also,way ahead of you on the insulating fuel system and running longer carb vent hose below the bike to get fuel away from hot motor which i have already covered in this post i guess you didnt read.

I also had posted that info mult times since late 2009 here in RSC trying to help fellow RSC members fix thier carb puke. But as of yet after poasting how to properly do the insualting along with what insualting material to use with it only taking approx 1.5 hrs to do with $20 materails nobody seems to think its worth while and hasnt tried it doing it just like i stated that i am aware of since i have been posting that fix for approx 7 months now and still no takers. But there were plenty of carb puke complaints here in RSC and plenty of comments that suggest what i did that fixed my bikes almost constatnt carb puke post every hot shut down said it would not work .

Others said they tried it but only insualted the fuel line inbetween the cyls which isnt enough a all and they need to tripped insulate the fuel ines that run inbetween the cyls along with flao bowl and carb body where you can without affecting proper thorttle cable operation etc.

But I disagree on the concern issue,i think there is reason for concern here because in certain cond this carb puke issue could possibly injur someone.

Thats why i have been posting on the carb puke fix i did and drain hose mod for 7 months trying to help out and also posted this carb puke incidnet to make people aware of what can happen like the fellow R* owner when his bike caught on fire when it puked fuel all over the motor then backfired/poped back thru the carb when he tried to fire it up when his wife getting on the bike at the same time it lite up which could have hurt her too.

Luckily niether of them was injured and that was just 1 of this type incidents i found where a R* lite up due to the carb pukeing fuel but the point is it can happen when you dont address this issue like you & i have with extending the drain hose and insulating the fuel system to stop or at least greatly reduce the frequency & or intensity of carb puke should it happen.

To me thats something to be concerned about and is why i made the mods i did that i have been trying to get a few fellow RSC R* owners to try out that have lagit carb puke issues that have alreadey verified the float lvl is properly set and there no dirt in the needle & seat causing the carb to flood too.

It would be interesting to see just how many carb puke issues could be fixed if people took the systamatic approach i laid out for properly insualting the fuel system from extreem heat along with what hi tech space age 2k deg insulating materail to use & how to install the longe carb vent hose to get the puked fuel to drain below the bike too.

So read this persons account of thier experience with their R* getting lite up which i pasted below for you to read and also keep in mind this isn't the only R* that has caught fire due to carb puke either,i read about a few others over the past months too.

And thats just my $02 too/LOL!!!

Scott



2005 YAMAHA XV1700 User Comment / Complaint

2007-03-31 00:00:00 Ravenna, OH

I was riding my motorcycle out of aspen colorado when i stopped to get gas. i filled the tank on my motorcycle. i then went inside and took a 15 min break. i then got back on my bike, started it and told my wife to get on. as she was getting on the bike stalled. unknown to me the carburetor started overflowing, dumping fuel on the hot pipes and my right boot. i hit the starter to restart the bike and the bike backfired setting the vaporized fuel on fire. we were able to put the fire out. there was some damage to the bike and the bike had to be trailered back to ohio. thankfully no one was injured.

Thanks Scott...I did have the same issue and That was the fix that was done by the Yamaha rep a yr and a half ago...sitting in traffic my beast was vaporizing the ethanol which lead in part to airbox pukin at restart. Hopefully our fellow brothers even if not having this issue will take the preventive measure and do the reroute.

I'm not looking at it now but I think on the backside of the stock airbox there is a small drain hole near the bottom. In case fuel were to exit the mouth of the carburetor as well as the bowl vent hose it might not be a bad idea to somehow connect a hose to that drain hole and tee it into the alternate vent hose routing you suggested.

I don't know though if other air cleaners like the BAK have a provision for a drain but it's something to think about.

Scott B.