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Post by socal50 on Jul 22, 2015 18:30:21 GMT -5
The cylinder should be soaked after all starting attempts, is the spark plug "wet"? If not, it's not getting fuel, check intake valve! Not sure what you mean by check intake valve, valves already adjusted, intake elbow and carb are new. |
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Post by socal50 on Jul 22, 2015 18:27:13 GMT -5
Are you sure the valve timing is correct? IOW, did you check it when you were doing the valve clearance check? Not clear on what you are asking. How do I check the timing when doing the adjustment? I used large hole centered on timing chain wheel on top of the head to set motor. |
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Post by socal50 on Jul 21, 2015 9:55:31 GMT -5
...Battery is good, I have it on a trickle charger now because I have been cranking it over so much over the last few days.
I am hoping there was some kind of fluke with the electrical system, maybe because of the incorrect regulator or something else making the timing way off... or something else...
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Post by socal50 on Jul 21, 2015 0:22:38 GMT -5
I just did the valve adjustment, exhaust was off.
I just noticed that there is a 2 pin connector that isn't connected to anything (T-shaped, with 2 wires coming out of it although it could house 3). Spark tests perfect on all tests, but I still think there is something electronic/timing/spark related. I am ordering a whole new harness, coil, stator, etc. My new hypothesis is that there is that someone else tried to 'fix' a problem with this scooter in the past and ended up making all kinds of mistakes in the meantime-like installing the wrong kind of regulator (4 wire instead of 5 or 6
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Post by socal50 on Jul 20, 2015 21:51:39 GMT -5
Update- noticed some sparking when poking around at the regulator.... pulled it off and the thing was smoked. I have an extra, I put it on, but didn't help my situation. Not sure if this could be related to this thing not starting or not? See pic  |
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Post by socal50 on Jul 20, 2015 20:57:59 GMT -5
If I understand, the engine turns over but there is no hint of a "fire" at all. If that's true, it's pretty unlikely to be valves - unless the valves are so off they are completely closed. It's also most unlikely to be a timing problem. Either of those would cause it to not start, but there would at least be evidence of the engine trying. 1. Fuel in the clear line does NOT mean fuel in the carb bowl. Open the drain in the carb bowl to make sure there is gas there. 2. It's really simple to do an end-to-end check on the ignition system. Go to Harbnor Freight and get a $5 in-line spark tester (plug wire snaps on one side of the tester, other side has a wire that snaps onto the spark plug. If a spark the tester will light up). If you have an induction timing light that will also test the spark. Unfortunately, checking the plug NOT SCREWED IN is a decent test but does not assure you are getting a spark under compression. I'll go out on a limb and guess you are not getting a spark. May be as simple as loose connectors on the coil (those crip-on spade connectors loosen up over time). May be your CDI is bad. May be a bad spark plug boot - to - spark plug wire connection. But checking compression should always be step #1. Thanks for the ideas. -Did a compression check today, 175 psi on harbor freight compression checker as expected. This was on E-start only, not using kick starter at all. -Bought Harbor Freight in-line spark tester. Appears to be good, light flashes mostly an Amber color, but appears to be working correctly. I had to modify the tool to accommodate our style plugs, ground down tip and used an extra spark plug boot on other side. I have a complete, great running scooter I can tear down to use the motor, but I would rather get this puppy going! I bought a new CDI/Coil anyways and am planning on swapping those on as soon as they arrive. Any more ideas? Im totally stumped. |
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Post by socal50 on Jul 20, 2015 10:13:23 GMT -5
3 things needed to fire up intake fuel, compression , fire, exhaust. Check you compression if none, check you valves, you said you spray fuel in no start what is left after that is fire cdi controls that. If you have a tester from harbor freight cheep clips on plug and spark plug wire on it crank engine see if you go any spark. what you need to fine what of group is missing it needs all to fire up. You might read through the posts made previously... |
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Post by socal50 on Jul 19, 2015 18:11:20 GMT -5
Ok, update for today:
-New plug installed, nothing.
-Valves adjusted. Lower (exhaust) was tight, I dont know if it had any clearance, upper (intake) was a little loose, I adjusted them both and still nothing.
I tried spraying starter fluid into carb after doing both of these to make things a little easier... nothing.
How do you recommend doing a compression check on this motor? I have the harbor freight compression checker that will work.
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Post by socal50 on Jul 19, 2015 18:09:17 GMT -5
I would look to see if the seat back comes out. The gives you a window to the engine or a floor board. John Unfortunately, nothing comes out. |
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Post by socal50 on Jul 19, 2015 10:52:36 GMT -5
Anyone have any other ideas? I can check the valves, but I am going to have to prop it up somehow to get under it to do this... my neck is done!
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Post by socal50 on Jul 19, 2015 0:53:52 GMT -5
I agree with geh, check the valves. It's really not hard and barely getting into the engine. It's 4 bolts holding the valve cover on, and then you are at the valves. Unlike a scooter, your trike has 3 wheels and has more of a body and more weight to carry. I would expect something like that to have the valves tighten up faster than scooters. I am getting NO sense that it wants to fire. Cranks over great, but isn't firing at all. Could this still be valves? It seems like it would give a little fire every once in a while if it was a valve issue? |
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Post by socal50 on Jul 18, 2015 22:21:10 GMT -5
Wild looking thing.   Is that yours?? I hate to tear the motor apart for the valves just to find out they are OK. ODO shows 1,2xx miles, it doesnt seem likely that the valves would be that far out of wack. This thing sucks to work on, I have to basically reach around for everything. My neck is destroyed. I took off the vacuum line on the intake and sprayed starting fluid directly into the intake while cranking over, and still nothing. I am wondering if the spark could be the issue? I am going to get a new plug, but is it possible that the spark could look good but still not be enough? Really appreciate any ideas on what to try. |
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Post by socal50 on Jul 18, 2015 17:41:05 GMT -5
Hey all, Have a 2007 Suntrike (Google it). It's a 3 wheeled car powered by a 150cc GY6 motor! This thing is so cool. Anyways, wont run. -Has great spark, I test it on the head of the motor (I believe eliminates possible bad ground) -Has new carb (I dont clean carbs...I spend $30 and put new ones in every time -Good battery/starter (Cranks over great) -Can visibly see fuel being delivered to carb with a clear fuel line -No air filter on it currently, when I bought it the filter looked like new. -Tried spraying starter fluid in carb while cranking, no dice. -I haven't done a compression check, but motor noise sounds perfect (I have played with many GY6's I have 2 more scooters at my house now. Healthy sounding, 1100 miles on odometer. I cant get it to pop at all. There is a problem to the starter switch, so I short out the starter relay to get it to crank over. Could be a timing issue, but I am all but positive this motor has never been taken apart, seems so far fetched. Ideas greatly appreciated! Here is a pic of what this puppy will look like on the road (Not me!)  |
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