19mm carb hose locations

[Bill_P]

I found this pic while searching the forum for info - just to double check, is this the correct locations for the oil and vacuum hoses?
(It just seems a bit conterintuitive since the nipple sizes are opposite of the hose sizes.)

Thanks.

- Couldn't get the attach to work, here's the link to the pic: http://www.provoscooter.com/vbull/attachment.php?attachmentid=228

[Zuma-Zuma]

I did mine opposite the pic. It really shouldn't matter which is which as far as the scooter goes. But the top spigot seemed larger, and held the vacuum hose better. I used a small zip-tie to keep in on better. The oil line had a small metal spring band, and it seemes to stay on well. I also used a zip-tie on the fuel line, as I had a problem with it coming off. Since then, everything is fine

[Bill_P]

That's the way I hooked mine up too.

The HUGE problem I'm having is with starting. When I first go to start, it kicks right over and then dies, and then no amount of effort will start it. I've checked all the lines and everything seems to work. The only way I got it to start was to pull the slide and dribble in a bit of gas. To restart I have to keep the revs high until it warms up then it seems fine - if it dies though I'm unable to start it again without adding fuel directly into the carb.
To me it sounds like there is some difficulty pulling fuel into the motor, or possibly a float bowl issue - any help would be much appreciated!!!

[Zuma-Zuma]

I would suspect the electric choke. Make sure its in tight, the clip is in and the wire is connected. Mine will kick the first time, everytime. You can check the vacuum valve by simply disconnecting the fuel line from the carb, and the vacuum line. If you gently suck on the vacuum line, fuel should flow from the fuel line. I've heard of a few people that had problems like this, and the vacuum port wasn't drilled into the carb all the way.

[Bill_P]

Thanks, I'll tinker with it again this afternoon...

[Bill_P]

Zuma-Zuma, what are you running for an airbox? I had hoped to run the stock airbox, and put the 80 mainjet in before I installed the carb. I didn't check the idle jet - Is is possible that the idle jet is too big and the motor is just drowning when it tries to start. I have the air/fuel screw at 3 turns out and it runs the best there (when I can keep it started). That seems like alot - I've read that most are running around 1 turn out.

[Zuma-Zuma]

I have the foam filter. With the stock airbox, the 80 is a good start. The A/F screw will help in fine tuning, but probably won't affect starting (remember, out is lean). If I had my scooter here, I would go and check mine, I'm not sure where my screw is set now. The stock idle jet works fine. I tried others, and the stock one works best. If starting is still an issue, and you are sure that the choke is operating correctly (you're using the one that came with the carb?) I would find the cause before going on. Always start with a NEW plug. Make sure you have fresh, clean fuel. Try and start it without using extra fuel. If it doesn't start, check the plug and see if its wet or dry. Is this a problem since the carb, or the complete build?

[Bill_P]

I did my build piece by piece so that if I did run into any difficulties it wouldn't be too hard to track down.

I pulled the e-choke and tried to see if it was working, but I didn't see it (or the stock one) move at all. I do suspect that it is working because when I did get it started the revs were high and then went down to a normal idle after a while.

Back to starting - after trying to see if the choke was working I figured I'd pull the air filter and choke it the old fashioned way - put my hand over the opening. To my suprise (it didn't start) my hand was soaked with gas when I pulled it away. I then just removed my hand, and after a couple of kicks it started right up. It blew out quite a bit of smoke almost like the crackcase was loaded up with fuel. And like before the e-choke seemed to be working (i.e. the revs came back to idle after a minute or so).

So again this leads me back to the idea that the motor is just getting too much fuel when trying to start - and also that I had to run with the air/fuel mixture screw 3 turns out. I suppose I could put in the 95 main jet and run a foam filter, but I still would rather use the stock airbox. Any thoughts?

[Zuma-Zuma]

I would work on that starting problem. You may have a bit of dirt on the needle letting fuel in and flooding it. Usually, when it idles hi, then slowly backs down, its lean. Once the scooter is warm, does it idle and perform good? I really can't tell when my choke works, it just starts easy, and idles normal. It almost sounds like you have an air leak. Like a hose not connected, or a gasket slipped on the base. If it runs better once warm, do some plug checks, and see what color they run. If you leave the 80 in, and run the foam filter, you should be lean if anything. You may want to start another thead, about the starting problem, and let others give their .02. If these problems started when you installed the new carb, and it ran and started good with the old carb, I would pull the carb, disassemble it, and inspect for dirt or debris. I had a bit of gunk behind the mixture screw that gave me a headache. Glad I pulled it!!

[Bill_P]

I found that the float bowl screws weren't tight, but it didn't solve the problem. I'm going to pull it all off tonight and see what I can find. If all else fails I'll repost like you suggested.

Thanks for your help!