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no speed
by: steve - Feb 11, 2017 13:47:44 GMT -5
via mobile
Post by steve on Feb 11, 2017 13:47:44 GMT -5
Is it a Kymco?
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Post by steve on Feb 11, 2017 13:45:58 GMT -5
Hey, ya'll.
I'm having a no spark issue. Here's what I know :
There is 50+V in the red wire, when I crank it.
There is 2+ V in the pickup wire. The black wire grounds only when I turn the key, or hit the shut off switch.
I tried 3 CDI. I even cut the connectors off, and hard wired one of the CDI with a pig tail.
CDI is grounded. Tried 2 ignition coils.
What the heck is going on here?
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Post by steve on Feb 24, 2016 8:11:09 GMT -5
Is the old CDI a good bit larger than the new ones?
One way to tell is on the wiring harness. There is one side with a 4 wire plug, and a 2 wire plug beside it. Does the side with the 2 wire plug actually only have 1 wire on it? I'm talking about the wiring harness on your scooter.
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Post by steve on Feb 24, 2016 7:51:05 GMT -5
BTW, I don't know where that "blah blah" emoji came from. I did not mean to put it in there. What I meant to say was that an eighty five main jet should be about perfect. Try an 80, and an  . If they feel about the same, use the , as it is always better to use a main jet that is slightly too large, than one that is slightly too small. You should be able to comfortably cruise around at about 35, give or take. Some 50cc scoots come with a 44mm piston, instead of the standard 39mm piston. I happened to have that larger piston on one of my first ones, and when I put an eighty five main jet in that thing, it really pepped it up. As far as jetting advice goes; you can tell, for the most part, by how it acts whether you have it jetted properly. I can tell you with confidence that you are going to need somewhere between an 80-  . I think an eighty five will be perfect for you. After you run it for 5 miles, or so, take the spark plug out, and it should be a nice, chocolate brown on the tip. You can do that if you want to, but the only thing you want to make sure of is that you are not running too lean. As long as you are running a #80, or larger, you stand no chance of running too lean, so you can just pick the size that performs the best. If you decide on one larger than an , I would keep some spare spark plugs, and a spark plug wrench under your seat, because running it real rich will foul the plugs quicker than usual.Just remember, rich is good, lean is bad. Err on the side of a larger jet. Hope this helps, Steve I don't know why, but when I type numbers, it inserts that emoji. Every place that I typed eighty five, with numbers, it inserted the "blah blah" emoji. |
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Post by steve on Feb 23, 2016 10:34:23 GMT -5
If you are having to run it with the choke on, you are not getting enough fuel. This is why you have to cut the air flow off. You need to take the carb apart, and clean the jets. I bet there is gummy stuff clogging the main jet.
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Post by steve on Feb 23, 2016 10:27:10 GMT -5
They will do 45 mph, if you go down a long enough hill. You can generally expect to cruise around at about 30. The 20mm carb is pretty much a waste of money, unless you are going to put on a big bore kit. With your pipe, and the air filter, an main should be about perfect. Try an 80, then an , and check the spark plug, and judge the performance as to which one you like better. It's better to be slightly rich, than lean. Being a little on the rich side, which means having a jet slightly too large, will make your engine run cooler, which will help engine life. As for oil, I use 10w-40. |
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BBK Carb ?
by: steve - Feb 16, 2016 11:09:05 GMT -5
via mobile
Post by steve on Feb 16, 2016 11:09:05 GMT -5
Alright, I installed the 24mm carb. Just a standard carb for a 150cc. A 100 main was too large. I had to go down to a  . It came with a 31 idle. The 150 manifold does fit, but it is angled wrong, so I had to use a performance manifold for a 50. It definitely runs better with the larger carb. It loves it. I actually made an intake out of 1-1/4 " PVC pipe. The elbow fitting fit perfectly tight on the carb, and I ran it to the rear to cut the noise. Works great. I do wonder why I had to use slightly smaller jets on a larger carb to make it work? |
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Post by steve on Feb 6, 2016 23:37:07 GMT -5
The oil leak probably did not cause damage, but the oil leak may be the sign of some damage.
I don't know what that metal scrap is, but it had to come from somewhere. I don't like this one bit. I guess all you can do is inspect everything, put it together, and run it to see what happens. See if it is leaking oil. Listen while it runs. Use your gut.
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Post by steve on Feb 6, 2016 11:51:10 GMT -5
Good catch.
.004" is actually good. That is fine, and should not cause any problems. Set your intake at .004", and the exhaust at .005", and that is good.
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Post by steve on Feb 6, 2016 11:42:52 GMT -5
If it was running fine with a 75, you should put no larger than an in there with a pod. Probably an 80. It's most likely your needle valve, the diaphragm, or the needle getting hung up. Is your needle adjustable? Take the cap piece off of the top, pull the diaphragm out, and see if there are slots for you to adjust the little ring on the needle. Make sure the needle and diaphragm move up and down freely. Look up needle adjustment on YouTube. |
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BBK Carb ?
by: steve - Feb 5, 2016 10:19:34 GMT -5
Post by steve on Feb 5, 2016 10:19:34 GMT -5
The key is to match every port as close as possible. I have no problem with telling you to go with a 24 mm carb. My carb on the 150 with a 58.5 bbk is a 32mm . my intake manifold is a 30mm , and I'm not sure what the intake port is on the ncy 58.5 racing head ? But I'm sure its not 32mm . I'd say go with the 24 mm carb and see what size manifold u can get. Alright, GEH, I ordered just a stock 150cc carb for $20. And, a stock 150cc manifold. A couple of questions: It does not say what size main jet it comes with. I have the 52mm BBK. What size main jet should I go with. I run a 43 idle, and a 94 main on my 20mm carb right now. Should I put the 43 idle in the new one, and just roll with the main jet that is in it? I think it will come with a jet between 100-108, right? |
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Post by steve on Feb 5, 2016 9:27:34 GMT -5
The key is to match every port as close as possible. I have no problem with telling you to go with a 24 mm carb. My carb on the 150 with a 58.5 bbk is a 32mm . my intake manifold is a 30mm , and I'm not sure what the intake port is on the ncy 58.5 racing head ? But I'm sure its not 32mm . I'd say go with the 24 mm carb and see what size manifold u can get. Thanks. I'm going to give it a try. I wish I knew the difference between the 24mm carbs made for 150cc scoots, that sell for $25, and the 24mm "performance" carbs made for 50cc scoots that sell for $150? I'm getting the 150 carb, and manifold. I will report how the manifold fits, and how the carb performs. |
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Post by steve on Feb 5, 2016 9:14:35 GMT -5
I recently just had a starting issue, and it turned out to be an aging/partially fouled spark plug. That got me curious about spark plugs, and ignition coils.
Do the orange and red ignition coils really give you a hotter, better spark?
Are the Iridium spark plugs worth it? What is the difference? I bought one, and am using it, but was curious.
Also, has anybody used those spark plugs with the 3 electrodes on them? I ordered a couple of those, also.
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Post by steve on Feb 5, 2016 9:04:02 GMT -5
As for jetting, Here is what I've settled on:
I have a 43 idle jet, and a 94 main. I was running a 35 idle, and a 100 main, but it was a terror to start on cold mornings. I know that idle is pretty large, but it really likes it. It takes off the line better, and fires right up on cold mornings.
I could not get it to start at all with the orange CDI in it before. With this 43 idle, it will fire right up with an orange CDI, or even those blue ones with the pigtail, and the LED light on them. I took a little off of the main to compensate for the larger idle. That's OK, right? It really does operate better with it.
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Post by steve on Feb 5, 2016 8:56:12 GMT -5
Alright, here is one of the ones that made my scoot very, very hard to start.  Second one is a clearer pic. What'cha think? Too black and crusty?  |
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. If they feel about the same, use the 
. I think an eighty five
. It came with a 31 idle. The 150 manifold does fit, but it is angled wrong, so I had to use a performance manifold for a 50.