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› Problems starting!! HELP!
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Problems starting!! HELP! (Read 450 times)
verslagen1
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Re: Problems starting!! HELP!
Reply #15 -
07/18/22 at 11:48:36
Furby wrote
on 07/18/22 at 09:55:20:
I did see a post, where you take the vacuum hose off of the petcock and give a suck on the hose to see if fuel is coming through to see if the diaphragm is leaking. I tried this and it’s like I’m sucking through a straw, I don’t know if there should be back pressure with this action but it felt like there was no pressure at all
got nervous that I was just inhaling gas fumes.
Not good, is it a new hose? they do leak after awhile.
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justin_o_guy2
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Re: Problems starting!! HELP!
Reply #16 -
07/18/22 at 13:42:16
I'm thinking the test leaves the hose on the petcock and off the the vacuum source. You want to test the petcock, so apply vacuum to the petcock and see what happens.
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Furby
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Re: Problems starting!! HELP!
Reply #17 -
07/18/22 at 14:26:24
Vers, it’s all old stuff. I think the test was to see if the diaphragm was leaking right?
Justin, I’m going to look into that raptor petcock tomorrow. All the shops are closed Monday so I’ll see if they have them. If you have a part # that’d be great help.
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jcstokes
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Re: Problems starting!! HELP!
Reply #18 -
07/18/22 at 15:56:17
Sorry, I don't have a number, but it's got to be genuine Yamaha Raptor 660 and not a Chinese knock off. There are smaller raptor ones so be careful.
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Completely stock 2010 S40, aftermarket rev counter and back pack, Airhawk seat pad
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justin_o_guy2
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Re: Problems starting!! HELP!
Reply #19 -
07/18/22 at 18:30:49
I feel much more comfortable when I have the
Soon to Be Replaced
part with me when I'm buying the replacement.
I don't know that part number.
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verslagen1
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Re: Problems starting!! HELP!
Reply #20 -
07/18/22 at 18:40:56
use my tech section index link
go down to petcock
test your petcock
it's in there somewhere
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Furby
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Re: Problems starting!! HELP!
Reply #21 -
07/19/22 at 13:08:04
So. I just took the carb back out and the air hose from the air filter is damp with fuel. Taking it apart now. Any information would be great if you’ve seen this problem before
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verslagen1
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Re: Problems starting!! HELP!
Reply #22 -
07/19/22 at 14:24:54
I've seen it... usually when the rpm is too low and the valves don't close fast enough causing a little burp of fuel.
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Furby
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Re: Problems starting!! HELP!
Reply #23 -
07/19/22 at 14:28:31
Oh. Gotcha. So up the idle screw? maybe because I’m having issues having it start it’s spitting through or need to get do more work?
By the way, really appreciate all the help you guys are. I was part of this site way back when I first had the bike and you guys have all been awesome! Glad you’re still here!
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Furby
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Re: Problems starting!! HELP!
Reply #24 -
07/20/22 at 13:55:30
That’s the plug
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Re: Problems starting!! HELP!
Reply #25 -
07/20/22 at 14:29:01
One thing that I noticed is that when I did have it started for a short time, there was a lot of “rust” I’d imagine coming out from the connection from the header to the muffler. Don’t know if I’m saying that right but here is a picture of the build up.
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verslagen1
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Re: Problems starting!! HELP!
Reply #26 -
07/20/22 at 15:13:17
sh!t happens, but if it's blowing out... you gotta leak.
plug is rich, but if you've only been idling it... on choke... it should be.
you wouldn't want to select a plug by this.
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Re: Problems starting!! HELP!
Reply #27 -
07/20/22 at 15:58:53
You can see from your picture that your idle mixture screw sticks out just a bit. That indicates that you either have it grossly misadjusted, or you have the wrong mixture screw installed. See how your screw is sticking out just a bit.
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DragBikeMike
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Re: Problems starting!! HELP!
Reply #28 -
07/20/22 at 16:00:54
If it's the wrong screw, or if you have it turned out way too far, it's not gonna idle and it WILL run rich to da max.
When correct, your screw will look like this, way down inside the hole.
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Re: Problems starting!! HELP!
Reply #29 -
07/20/22 at 16:06:07
Please check your screw and report its position. Turn it in until it bottoms. Use a light touch, just till it bottoms. Don't try to tighten it. Just turn it until it lightly bottoms. Report how many turns it was open. When things are correct it will be about 1-1/2 to 2 turns open.
BTW, if you want help and you appreciate getting the help, have the courtesy to perform the simple diagnostic checks advised and report the results back.
So, how many turns?
Take a picture of the screw when it's bottomed out and post it so we can see how far it went in.
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