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Post by unorthodoxneon on Jun 23, 2010 23:17:09 GMT -5
Thats why i asked other dawgs first before make the suggestion but something to use as a starting fluid or like mentioned gas is to see if the scoot can even start.
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Post by galileo2 on Jun 28, 2010 16:16:46 GMT -5
Hey everyone. I finally got to working on it again after finals week. I decided to bypass thoes air valves on the vacuum system and now I'm getting plenty of gas to the cylinder. It is still loosing compression, however. I found a good way to test the intake valve. I removed the intake manafold, sprayed a little gas onto the intake valve and turned the engine manually on the compression stroke. And sure enough there were bubbles comming from around the valve untill about half way throught the compression stroke and when the pressure pushed the valve closed. After that, I could hear air leaking. I could only hear it with the valve cover off. I took off the cylinder head to check the gasket and found gas all over the part of the gasket that is inbetween the cylinder and the cam chain. I didn't notice this before because I wasn't getting an gas, but now it is as clear as day. I still have one more test to try, but I think that I'm going to have to replace my cylinder head. Anyone know of a good brand/website? The last couple of parts that I baught from www.partsforscooters.com were defective and I'm pretty sure that they sold my info to telemarketers.
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Post by ootscoot on Jun 28, 2010 16:31:55 GMT -5
try buggyparts nw - the heads come with valves installed - $49. They ship right away. Save your exhaust and intake studs.
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Post by galileo2 on Jun 28, 2010 19:40:12 GMT -5
Thank you ootscoot. The website looks good. I really appreciate it. Ever since I started ordering parts from partsforscooters.com I've been getting calls from "global rewards" and they are very rude. I would steer clear of them.
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Post by ootscoot on Jun 28, 2010 19:43:55 GMT -5
Yea, Buggyparts NW has quality parts, and so far no other "issues" -
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Post by fugaziiv on Jun 29, 2010 8:31:10 GMT -5
Wow, this is troubling to read. We have never sold our customer list to anyone. Period. Nor would we as we pride ourselves on how we treat our customers and wouldn't do anything to jeopardize that relationship. I would hope that it is just an unfortunate coincidence.
galileo2 - Also, if any of our parts were defective did you contact us for a refund, or replacement parts? We make sure that all of our customers are taken care of to the best of our abilities. If you have any questions, please let me know.
Matt
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Post by galileo2 on Jun 29, 2010 17:01:20 GMT -5
Matt,
Perhaps I can email you with more details of my experience. Do you have an email that you don't mind posting?
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Post by fugaziiv on Jun 30, 2010 8:41:34 GMT -5
galileo2 - By all means email me at matt@partsforscooters.com
Matt
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Post by galileo2 on Jun 30, 2010 11:46:08 GMT -5
I ordered a new cylinder head and it should be here next week. Untill then, there isn't much more that i can do. Thanks everyone for the help.
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Post by galileo2 on Aug 5, 2010 23:41:51 GMT -5
Hello every one. I finally installed the new cylinder and battery. Unfortunately though, it still won't start. My compression is 90 psi. I squirted in some oil and that braught it up to 120 psi. I double checked my piston ring gaps and they are at the proper angels. I lathered the piston up with plunty of oil but that didn't help. Does any one have any ideas?
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Post by WildMan on Aug 6, 2010 10:22:54 GMT -5
galileo2 I don't mean to sound obnoxious but, I did tell you were working in the wrong place, & that the top end & compression probably wasn't your problem... Also told you that your compression tester probably isn't giving you a good reading... If my memory serves me right, I said it likely was cam timing & or fuel delivery if you have spark... But I am sorry to hear you're still having troubles.. I hope you figure it out, as summer is stating to come to a close...
David Sr.
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Post by galileo2 on Aug 6, 2010 10:35:16 GMT -5
David Sr. I did buy the compression tester that you suggested. My timing is good, I have spark, and it's getting fuel. The only other idea that I have is that I'm using the wrong fuel. I have been using 91 octane that requires a higher compression ratio to ignite. I'm going to use regular 89 this time and see if that helps. Or possibly my fuel is contaminated. I am sure that the timing is good.
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Post by galileo2 on Aug 6, 2010 11:41:01 GMT -5
Is it possible that the spark is firing at the wrong time? I'm sure that I set the timing correctly, could there be an electrical problem?
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Post by WildMan on Aug 6, 2010 12:14:19 GMT -5
galileo2 87, 91, 93 octane, will not make any difference, it either fires, or it doesn't... I've used both 87, & 93 octane gas, I pretty much only use 87 octane, as the GY6 engine is not a high compression engine, but either works fine... You need to go back to the basics, if you have good spark & getting fuel into the cylinder it has to at least fire, unless 1) the cam timing is off, or the ignition timing is off... So if you've got good spark, & ignition & cam timing is set right, then it's has to be fuel delivery, that's it... If you have all of these components correct the engine has to do something, at least fire... The engine should at least fire & could run w/ compression as low as 75 lb, may or may not run very good but should do something...
You say the 3 major components (fire, fuel, timing) are right, that means engine will fire & should run, but it doesn't, which means you're wrong about that, but I can't convince or prove to you of where you're going wrong from here, so I guess I can't help you...
But I do wish you luck, as I know how it feels to have a down cycle, & have good riding weather, & can't ride because of a broken cycle...
David Sr.
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Post by galileo2 on Aug 6, 2010 15:18:22 GMT -5
I believe you, something is not right. It is getting fuel but I don't know if it is getting enough. I know that is has spark. I know that the cam timing is correct but I don't know if the ignition timing is correct. I do very much appreciate your help and I still need. You told me not to give up and I'm not.
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Post by WildMan on Aug 6, 2010 15:58:20 GMT -5
galileo2 YEP, you're right, I did say that... If you didn't mod the ignition (pick up coil), then the ignition timing should be right, as there's no adjustment for the GY6 ignition timing w/ modding it... Did you squirts some gas in the cylinder & try to get it firing??
David Sr.
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Post by galileo2 on Aug 6, 2010 20:51:59 GMT -5
I did squirt some gas using als01seville's suggestion of putting some gas in the vacuum tube and cranking it and nothing happened, but I did that before I replaced the cylinder. I will try it again tomorrow.
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Post by sprocket on Aug 7, 2010 18:01:04 GMT -5
>>>. My compression is 90 psi. I squirted in some oil and that braught it up to 120 psi.
Way low...you you should be up around 160psi. I think the general thought is 140 psi is about as low as you can go and still get the engine to run.
Valves...
How do you know you are getting fuel? Open the float drain and see if any gas flows out when you crank the starter...
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Post by galileo2 on Aug 20, 2010 16:18:47 GMT -5
I found the culprit today, my ingition coil is dead. Before I replaced the cylinder head I had a good spark. It makes since that the ingition could would die after trying to start it so much with out success. I ordered a new ignition coil and hopefully it will be the last part I order for a while.
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Post by sprocket on Aug 20, 2010 17:26:35 GMT -5
Glad you found the problem..have a great ride...!
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