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Post by xyshannen on Sept 18, 2014 15:52:54 GMT -5
Well today was a little more successful. Pulled the carb off and again verified no fuel was getting into the carb. Pulled everything apart and put it back together again..stuck it in and voila! it runs. I have no clue what the problem was or what changed to fix it...I guess I'll just toss this one up to the scooter gods messing with my emotions. Now I have some tuning to do.
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Post by xyshannen on Sept 18, 2014 15:48:44 GMT -5
I do need a new fan shroud because I got a lil too close with the torch heating and bending my header pipe. So thanks for the tip on the chrome ones. I wasn't too worried about going chrome because like you said mine is pretty well hidden but I figured since I have to buy a new one, some bling won't hurt. This well hidden part is also why I'm wanting too adopt PVC extension. So again my hat's off to you for your creative thinking.
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Post by xyshannen on Sept 18, 2014 6:23:04 GMT -5
oldchopperguy Thanks brother! BTW Where did you happen to find that chrome you used on the scoop extension?
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Post by xyshannen on Sept 17, 2014 18:52:27 GMT -5
Thanks guys, I've already confirmed fuel is at least getting "to" the carb, now I have to figure out why it's not getting into the carb. Will test tomorrow and let y'all know
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Post by xyshannen on Sept 17, 2014 16:35:00 GMT -5
But I like my hammer. Thanks that's my plan for tomorrow.
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Post by xyshannen on Sept 17, 2014 14:47:28 GMT -5
Ok, It's probably something stupid I'm overlooking but *sigh* here we go.
Put a new 30mm carb on and after 2 days of tinkering here and there I can't get it to fire. Then today I come to the realization that for some reason gas is not getting into the carb at all. I've changed my jets a few times thinking that was the issue but it seemed odd to me that non of the times did I have to drain the fuel from the float bowls. *scratches head* so today I decided to double check the plunger needle thing and low and behold it was bone dry and didn't smell of fuel at all. A visual inspection of the fuel line inlet doesn't show any blockages, least non that I can see. I pulled the fuel line from the pump and turned the engine over to confirm that the pump was indeed pumping fuel.
So my next step is to pull the carb apart and do a basic cleaning, blasting out all the nooks and crannies. Tho this is a brand spankin new carb and should NOT have any junk in it. Any other ideas or any input on what I need to check would be greatly appreciated. I've had it apart a few times to swap out the main jet and know the float bowls are working.
I'm bout to start fixin this thing with a hammer!
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Post by xyshannen on Sept 17, 2014 8:32:11 GMT -5
BTW I'm going to steal your filter intake idea. I love the metal exhaust pipe vs the rubber radiator hose I'm using ATM..
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Post by xyshannen on Sept 17, 2014 8:28:48 GMT -5
rcq92130 My motor had a small spacer already on it. So once I did as you suggested and ditched the rubber carb attachment on the polished intake I bought, it fit right up and cleared that engine mount. Putting it on is a little tricky as you have to kind of put them on separately and then at the last push towards the engine let them come together. I still want the 3" riser just because it will make working on the carb a whole lot easier. Granted I don't plan on taking my carb off and on much, but it's still necessary every once in a wile to pull the carb off and give it a good cleaning. That's great that you figured your problem out...now I'm still left scratching my head as to whats causing my issue. My scoot is a 2008 with only 2K miles on it. This tells me it sat for a good bit here and there. So my issue could very well be the fuel pump. I know I'm not lean and I know it's not my air filter. Remember it did this same thing with the original air box hooked up. So.... guess I'll start by replacing my fuel pump. I'm thinking about going with a 6-8 psi unit with a regulator on it. The whole shebang will only cost me 30 bucks so. ehh.. At least if it doesn't cure my problem I'll know that the pump should never be an issue in the future.
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Post by xyshannen on Sept 17, 2014 8:10:39 GMT -5
The main mechanical difference you need to be concerned about is the platform of the motors. I don't know one way or the other, but you need to find out if the 1500cc engine in the bike you are looking at is based one the gy6 or some other 150cc motor. I do know the Heritage is a gy6 clone. So it stands to reason that the motor in the other scoots under this name are the same or some other variant of the gy6. The honda gy6 clone is one of the most commonly used engines, making parts and performance upgrades readily available. Parts for a non gy6 based engine might be hard to find.
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Post by xyshannen on Sept 15, 2014 7:19:00 GMT -5
That's great man, I'd be the same way.
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Post by xyshannen on Sept 15, 2014 6:53:52 GMT -5
LOL @ Toppy, that's an awesome name, I certainly know the type. Yeah the last owner really didn't take care of this scoot at all. I'm lucky I got it with only 2K miles on it so it still has plenty of compression.
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Post by xyshannen on Sept 14, 2014 23:02:23 GMT -5
Ally please always feel free to correct me as I'm still learning also. You two are much further in diagnosing this problem than I am. My scoot doesn't do this wile sitting at idle, it only does it wile under load going over 60 mph. Because I'm not too worried about going that fast I haven't really dug in to trying to figure this out. I'm just offering what has been told to me to look at. rcq92130 Thank you for the tip on mounting the carb. I just did what you described and it did work. Both the stock and performance intakes pushed the carb too close to that convolutin cross bar. Cutting a piece of small water heater tube into a coupling is the ticket to getting the bigger carb on. Now I have to rejet the 30mm but like Ally suggests I may have to go back to the smaller carb. At least I can use the new intake on the old carb now. |
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Post by xyshannen on Sept 14, 2014 22:33:19 GMT -5
No the door is there just when the cap is off it's level with the floor boards. My scoot's previous owner lived out at the beach and used it to get to and from the bars at night. So yeah one can guess how filling it after a few drinks......
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Post by xyshannen on Sept 14, 2014 20:35:32 GMT -5
Think I will, thanks...Yeah that rubber boot also prevented me from using that intake on the stock carb. even if I can get it to fit I still want that riser for 1 it will make carb adjustments/removal so easy, and 2 it looks cool lol!
I'm crossing my fingers that you can figure this out before next month when I buy an electric fuel pump. I'm in no hurry to fix it as mine only cuts out at WOT and that's going over 60 MPH now on this scoot. I really don't ever need to go that fast. lmao I see you bought the 2-5psi pump..If this isn't figured out I'll try the 6-8. worst case is it floods the motor and is a wasted 30 bucks.
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Post by xyshannen on Sept 14, 2014 20:11:39 GMT -5
Yeah, I have a BMS. Looks pretty similar to yours (incl the stainless floor boards)! So --- you are going to raise the carb up so the pipe to the air filter goes OVER the cross brace, huh? That means you will sacrifice your under-seat cargo box ... right? Yeah these scoots are sold under several different brand names. I can always tell them by the seat config, the floor boards, and the chrome accent on the front all match up. Yes I plan to raise the carb up so that the air intake goes over that dang cross brace. The 30mm carb I bought hs that pumper thing on the side of it and it won't sit on the head except in a very very odd angle. I hadn't really thought about my underseat storage, but since you bring it up. Worst case I will just cut a channel length wise in the sub floor of the compartment and flip it upside down and reattach it. Making a tunnel in the bottom of the compartment for the carb and intake. I really don't keep much under there as it gets really hot. The body style on the vintage isn't very nice to air cooled engines in Florida heat. I think my rear side panels come down a bit further than yours. The airbox over the CVT was completely covered by the body. So things tend to get pretty warm under there. Before I added a cooling scoop it would get so hot under there you could literally heat your lunch in that compartment. This heat was what I thought to be the source of the cutting out. I was thinking that the heat was causing a vapor lock situation. Then it was pointed out that I was running lean. Then When I still thought it might be lean it was explained that the pump is the source of my problem. What Ally is saying makes perfect sense and is more than worth trying. But just so you know I was having this problem with the stock airbox and still have it running a 125 main jet on the stock carb. Rocky has also fought this problem with his lance vintage and said it.. well here easier to just quote him..hope u don't mind rocky. "The cutting out is usually the fuel pump not being able to keep up with refilling the fuel bowl at speed. Lance was pretty good at putting the correct jets in the carb in 2007 but... Once verified that you have a leak free intake and a clean fuel system, properly adjusted valves are really the next must to maintain a good fuel pump action at high speed. Changing the intake or the porting of the airbox can also have a detrimental effect on vacuum pulse which is required to maintain fuel flow with a vacuum fuel pump. I did try a Hydrogen/Brown Gas system on the Lance and that did help a bit with maintaining higher speeds and over time decarbonized the piston and cylinder. Clean piston rings are more free in their grooves and give a better seal for a better intake pulse. " |
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