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Post by jerseyboy on Jan 3, 2015 13:31:15 GMT -5
As long as you have good compression and strong spark,, from the sounds of your video I would check the pilot jet and all its ports,,then while your in there clean the main and all its ports to the throat...you got good flow to the carb inlet from the petcock right?
Spark was nice and blue?
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Post by scooter on Jan 3, 2015 13:36:24 GMT -5
Crunk Man! Where you been? How is your vlog coming along? I've been COLD. Haha. Seriously though just got all caught up in the holidays and whatnot so I haven't been around online as much. I'm still working on getting a suitable microphone setup going which is going to involve hacking my "NoPro", SJ4000 cam to give it a microphone in port. After that I'm in business! ...just in time for it to be a constant 30 degrees outside. :-p This is the perfect time to test out riding gear. After seeing you vlog, I got me a cool helmet to keep the cold out and it's frikken' 80 degrees here most days!   The bluetooth is nice for listening to music, and the inner sun visor is super!!!, but it is heavy and I hate feeling like my head is inside of a box! Fortunately I can open the chin guard, but I liked my cheapo 3/4 helmet I had better. I could hear and see better. I've seen some other helmets with removable chin guards. They might be a great choice for someone riding to work in 50 degree weather and coming home in 80 degree weather. |
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Post by one1 on Jan 3, 2015 14:38:34 GMT -5
Okay so I got it to start on its own without starter fluid from a cold start but it absolutely definitely has to have some throttle to start just a little bit about an 1/8 turn or so. I wasn't doing any choking on the airbox or anything it was just slight throttle and it did start on its own. It's always been TRYING to start, but it didn't hit until I only slightly gave it gas. I had a similar issue with a bad enricher on my cf moto v5 250cc, but this enricher checked out fine, moves as it should. Idk........
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Post by JerryScript on Jan 3, 2015 15:14:32 GMT -5
As long as you have good compression and strong spark,, from the sounds of your video I would check the pilot jet and all its ports,,then while your in there clean the main and all its ports to the throat...you got good flow to the carb inlet from the petcock right? Spark was nice and blue? I agree. Sounds like your enricher's port may be plugged. The enricher works by being withdrawn when cold, allowing a port to remain open feeding extra fuel. Once the enricher's wax heats up, it expands, pushing a plug into that port closing it off. That port hole may be gummed up, preventing the extra fuel you need at cold start from getting through, explaining why playing with the throttle has helped you. After cleaning, try adjusting your a/f mixture, it may be too lean as well. You did set your valves yet? |
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Post by jerseyboy on Jan 3, 2015 15:19:58 GMT -5
Thanks for the lesson on the enricher Jerry,,never knew how they worked exactly!
spell check for enricher WHAT,,THATS A WORD!!!...lol
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Post by one1 on Jan 3, 2015 15:50:40 GMT -5
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Post by one1 on Jan 3, 2015 16:04:07 GMT -5
Dang I really liked that idea, but that sucker is open and clear.   |
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Post by JerryScript on Jan 3, 2015 16:40:59 GMT -5
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Post by one1 on Jan 3, 2015 18:40:20 GMT -5
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Post by scooter on Jan 3, 2015 20:54:42 GMT -5
Well the bottom valve was tighter than . The top was fine. After an adjustment they are literally dead on .002in (.05mm) and are quiet as a mouse. I feel like it doesn't rev up with as much authority or power so I will have to adjust the mix screw. Either way I will be happily riding tomorrow for a test ride. Here's pics and a vid. I set my 150 gy6 to .004 intake and .005 exhaust, I think. gokartsusa.com/pdf/GY6_150_Valve_Adjustment.pdf |
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Post by scooter on Jan 3, 2015 20:56:15 GMT -5
Okay so I got it to start on its own without starter fluid from a cold start but it absolutely definitely has to have some throttle to start just a little bit about an 1/8 turn or so. I wasn't doing any choking on the airbox or anything it was just slight throttle and it did start on its own. It's always been TRYING to start, but it didn't hit until I only slightly gave it gas. I had a similar issue with a bad enricher on my cf moto v5 250cc, but this enricher checked out fine, moves as it should. Idk........ Will it idle once you let off the throttle? I think I had to toy around with my mixture screw and throttle stop screw to get mine just right. |
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Post by JerryScript on Jan 3, 2015 22:26:24 GMT -5
Well the bottom valve was tighter than . The top was fine. After an adjustment they are literally dead on .002in (.05mm) and are quiet as a mouse. I feel like it doesn't rev up with as much authority or power so I will have to adjust the mix screw. Either way I will be happily riding tomorrow for a test ride... .. Right on, glad you got it starting good! That's a bit tighter than most of us set our valves on a gy6 for one simple reason, soft heads. As the explosions occur in the chamber, the valves get hammered into the soft chinese metal heads a tiny bit. Most people find setting them looser not only gives better performance right now, but gives you more time between needing to readjust the valves. Over time, you have to set them less frequently, the metal finally gets compacted enough. You'll get the most power out of following alleyoop's tuning instructions I posted earlier. |
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Post by jerseyboy on Jan 3, 2015 23:55:11 GMT -5
I set mine both at .004 and checked them after 2000km,,the exhaust was at .003,intake was still the same,,pretty impressed,,I really don't go over 6K RPM's to often either,,no need with 16/37's in the rear.
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Post by one1 on Jan 4, 2015 16:02:00 GMT -5
well after adjusting the idle mixture screw it idles and takes off okay but even before I adjusted the screw and after both it bogs and crackles out the airbox quite badly when I give it to much throttle. It can't handle too much throttle or it cuts back and pops.
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Post by scooter on Jan 4, 2015 16:28:52 GMT -5
well after adjusting the idle mixture screw it idles and takes off okay but even before I adjusted the screw and after both it bogs and crackles out the airbox quite badly when I give it to much throttle. It can't handle too much throttle or it cuts back and pops. I know when I have cranked a scooter, without the airbox/filter connected, it bogs really bad. I am assuming that's a vacuum issue. There's nothing there to keep the vacuum pressure up. I have not been keeping up but I assume you've checked or replaced your vacuum lines. My 250 is jerking at open throttle. I can only do about 45 to 50 mph on it and have to keep the throttle somewhat closed. I have disassembled the carb, cleaned it, and replaced some of the lines, but I need to open it up, and see if there is even an air filter in it, and try to figure out why it's doing this. I have been busy trying to fix the turn signals and running lights. I have to go put it back together for work tomorrow.  Cracking and popping sounds scary. Wouldn't that mean your intake valve was open at the wrong time? |
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