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Post by dragono on Jul 27, 2014 14:02:10 GMT -5
Hey guys I went to the Kymco forums first with this question but it seems like nobody there can answer my question. So here goes, I have a 125cc kymco agility guy tried to put a gy6 engine into it. (would have worked if he knew what he was doing) however I have decided to put back in the orginal kymco engine. However he did not know which parts went with which engine so I have everything re installed all the way up the the cam shaft and rocker arms. (he only gave me one camshaft and one set of rocker arms.)
The camshaft seems fine however the rocker arms wont sit properly on the head/cam shaft. (A small clearance and I dont want to press of the bearings of the camshaft)I think I would need rocker arms that fit 69mm valves however I do not know if they make rocker arms for that size engine. ( i have found 50cc rocker arms for 69mm valves) but not 125-150cc rocker arms for 69mm valves.
Any ideas?
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Post by dragono on Jul 20, 2014 19:53:13 GMT -5
Hey guys, this guy again. I got a kymco agility 125 from a guy for a good deal. Thing is he says the motor is shot. So Im planning on rebuilding the entire engine starting with the crankshaft. (could i even tell if it was still good?) Thing is, I know all these engines are GY6's to some extent clones and what not. But are the crankshafts the same? Clearance wise? The reason I ask is because I'd rather not send 150 bucks on just a crank shaft if the same piece is 50 bucks on ebay (just says gy6 crankshaft). I just don't want to get the piece and it doesn't fit. Does anyone have experience in this area?
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Post by dragono on Jul 13, 2014 14:14:40 GMT -5
Wow this took an unexpected side ways turn. In any case. Thanks again to EVERYONE. A fake account? Who would go through that much work two appear to be two people. He would have to go mess up a bike just to simulate my issue. Who has that much time lol. As I said before here she is.  |
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Post by dragono on Jul 12, 2014 19:19:19 GMT -5
Rexxk I do appreciate your help bro. I really do. Some of your tips I had already done. (im not a newby to scooters) Clean carb, clean filter , that stuff so I kinda bypassed it my fault. The reason I thanked Alleyoop is because 1) He took the most time to come back and help me 2) His advice led me to the correct the big issue although yours helped it run better most likely 3) His Diagram showing how much each device effects the whole range of the scooter was great. I'm an engineer so its like speaking my language. And when I was stubborn thinking he wasnt right secretly, that showed me I was wrong. I do appreciate your input, you didnt have to, theres absolutely nothing in it for you. More input is always better. I didnt mean to make you feel left out bud.  |
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Post by dragono on Jul 12, 2014 18:16:51 GMT -5
I gotta hand it to ALLEYOOP he knows his stuff. I actually had to turn the AF screw ALL the way in. She idles a little lower than I like but never cuts out. I took her around the block and more.
Never had to push. Will update with a picture of her. I figure its the best thank you I can give to you guys on the forums.
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Post by dragono on Jul 12, 2014 14:14:04 GMT -5
Oh ok. I was on the thinking that the air fuel mixture only affected idle through about 1/4 throttle. (This was always my thinking when adjusting 4 strokes) guess these are different.
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Post by dragono on Jul 12, 2014 13:32:21 GMT -5
I understand how to tune for the the idle speed. Does this help my 1/2 to full throttle? Or should I raise the needle yet again and possibly buy a bigger jet?
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Post by dragono on Jul 12, 2014 6:10:13 GMT -5
Got it to idle just fine. Took the air box off. It wasnt sealed up all the way so I took some tape to cover all the holes and cracks the reinstalled. Did the exact same thing idles lovely. Dies from 1/8 to Wot. (everytime I check the main jet is clear).But now I'm thinking that maybe my choke is not working. Previous owner had a manual choke installed. It had all but welded itself to the old carb so re using was a not go. I'm going to test the ac volts coming from the line that works the auto choke( wasnt connect originally ofcourse) once I find my multimeter. If thats not working then its too much gas, but we are assuming too much air.
Update: I remembered I had lowered the needle a bit to make it run a little leaner. So I moved the clip down 2 notches to raise the needle. I can now get it to about1/4- MAYBE 1/2 throttle before she bogs.
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Post by dragono on Jul 11, 2014 23:02:40 GMT -5
Ok. Gonna get up bright and early to trouble shoot her. Will let ya know then. Thanks for your help man.
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Post by dragono on Jul 11, 2014 22:36:16 GMT -5
Both main jets are stock with the carb they came with. I checked that in both carbs. No numbers on either of the main jets. What should I be running at I know many 4 stroke 50's are between 70-80 usually. No idea about 2 strokes though.
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Post by dragono on Jul 11, 2014 22:09:57 GMT -5
Here's the vid. Like I said it dies out whether the air box is on or off. Also I ran the gas line directly to the carb like you said. No change. Haven't tested compression. However one would think its ok considering the gas flow when the petcock is hook up flows nicely. (no dribble) And the starting it up is very easy. Except in the video because I had clips holding the battery to its respective wires.
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Post by dragono on Jul 11, 2014 20:28:59 GMT -5
Ok so I made another system to use the side petcock that I had on another bike and it still dribbles a little bit. (same with the new petcock I had epoxied on there) Guess thats just how it is. And Guess what its the same deal. Every time I take the carb off and then put it back on it can WOT for about 15-30 seconds. And then she starts to give out. Made it half way around the block this time. Im tired of walking it back.  I even tried the old carb. She idled just fine then BLAM dies at WOT. I dont understand. If I take the fuel line off the carb while its running fuel is flowing nicely. I get the same issue from 2 separate carbs. I even lowered the needle (raised the clip) on the new carb just incase it was getting too much fuel. Usually if shes too rich I wouldnt be able to WOT at all. (atleast on a 4 stroke)  Im halfway between taking a torch to it and crying my eyes out over a bowl of ice cream. Anyone?!?!?!?! |
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Post by dragono on Jul 11, 2014 17:41:47 GMT -5
Nooo my thread is fine. And I've looked in 2 hardware stores all they have are course threads.
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Post by dragono on Jul 11, 2014 16:40:52 GMT -5
YESSS WHERE DO I BUY THIS!!!! Where do I buy the gas coupler. I'm also searching the internet as we speak.
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Post by dragono on Jul 11, 2014 14:02:37 GMT -5
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