Clinician
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Post by 95civicsi on Sept 20, 2014 15:32:07 GMT -6
Thanks for the feedback. Right now the switch is disconnected. Didn't figure it would be a problem because the engine runs with the switch in the off position.
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Clinician
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Post by 95civicsi on Sept 20, 2014 14:57:19 GMT -6
Thanks to all the members who have posted info about ignition trouble shooting. It's been helpful so far. Been having some issues lately with this scoot and I'm at a stand still with my ignition. I was riding at around 40 when the engine tried to die (like I'd hit the kill switch). Idle and speed dropped with no throttle response then fired back up as if the kill switch had been disengaged. After another minute or two it did the same thing but didn't fire back up and stalled out. When checking, I wasn't able to get spark on the plug. Withing the few weeks prior, I had just replaced the stator and coil. Disconnected the kill switch by cutting the line close to the CDI, replaced the CDI and spark plug trying to get spark. Still nothing. Took voltage readings to test the stator and CDI output.
Stator Output to CDI - 60-70 VAC
Pickup Coil to CDI - .5-.8 VAC
Output from CDI to Ignition coil - 2.5 - 3.0 VAC
Gap set to .032 on an NGK C7HSA
1ohm resistance across polls on the Ignition coil
8.8k ohms resistance from poll to spark plug tip.
I've disconnected all wiring on the harness except the Ignition and Regulator. Still no spark. Any help would be appreciated.
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Clinician
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Post by 95civicsi on Jul 12, 2012 6:24:06 GMT -6
heated it so I could bend it into shape, not the best as it tends to crease and fold in on itself. If you fill the PVC with sand while heating and flexing, using caps to keep it in, you can flex the pipe without kinks or folds. I've heard of springs being used but I think sand is easier to come by. |
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Post by 95civicsi on Jul 11, 2012 23:05:42 GMT -6
Quick update - read another thread earlier that may explain my problem. I didn't realize my air filter needed to be on to test the engine. I've been testing without it.
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Post by 95civicsi on Jul 11, 2012 22:42:16 GMT -6
Looks like a small hole on the muffler side of the new pipe. Or maybe a spec of dirt on my phone. Idk. Lol
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Clinician
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Post by 95civicsi on Jul 10, 2012 21:55:59 GMT -6
I changed the elbow. It won't get above idle. As soon as you open the throttle up, even with the back tire off the ground, it boggs down. I'm going to recheck my timing and the valve adjustment. The A/F screw is at 2 1/2 out and no adjustment seems to change the idle speed. I'll also recheck my voltages from the cdi.
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Post by 95civicsi on Jul 10, 2012 5:32:49 GMT -6
The carb was very clean, looked like it was almost new. The crack in the manifold went across the top from one mount to the other. Looks like this is a common problem.
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Post by 95civicsi on Jul 9, 2012 12:01:15 GMT -6
The intake elbow has a crack in it. I'm replacing it tomorrow. I'll clean the carb while I'm at it.
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Post by 95civicsi on Jul 6, 2012 22:41:17 GMT -6
Valve adjustment was off on the intake side. It cranks now but not easily. After it gets going it bogs down when you open the throttle up. While riding, it backfires heavily when you open the throttle. Max speed is about 15mph.
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Post by 95civicsi on Jul 6, 2012 10:14:32 GMT -6
Should there be any back pressure on the intake side?
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Post by 95civicsi on Jul 6, 2012 10:05:18 GMT -6
Should there be any back pressure on the intake side?
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Post by 95civicsi on Jun 29, 2012 22:40:09 GMT -6
So I put in a new cdi. Didn't fix the problem. Checked the wiring, the ground on the ac output of the cdi was tied to chassis ground. I believe it's only supposed be connected to one pole of the ignition coil, so I changed it. The positive output was connected to the other pole of the coil. The boot on the coil had intermitent connection, replaced the coil. I'm getting fire now. The black/red output on the stator showing 34-40vac and 5vac from the timing pickup. CDI is outputting 25-28vac. Engine still won't start. I'm rechecking the wiring to see if I made any other mistakes. The only thing left that makes since to me is that the fuel isn't actually getting in the engine. Inline fuel filter pulled gas through it when I first tried to crank it. Would the electric choke cause a problem starting?
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Post by 95civicsi on Jun 28, 2012 13:21:38 GMT -6
So after what appears to be a successful rebuild, my cdi decided to give out. Great compression now, but no fire.
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Post by 95civicsi on Jun 27, 2012 10:38:31 GMT -6
Thanks for the link. That is one of the threads I looked at that helped me pull the piston and variator. Tomorrow I'll put things back together. Got the parts I need today and the day off tomorrow. I appreciate all the feedback and I'll post as I go.
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Post by 95civicsi on Jun 26, 2012 11:59:25 GMT -6
Sorry for my poor choice in wording. The engine would turn over but not start. When trying to start the engine, the engine would turn over but would not run. When trying to start the engine, if you opened the throttle up, you could hear the engine try to move faster. I've already removed all the gaskets and ordered replacement rings, gaskets, and the rollers. The plastic around the engine was something I was unsure about because it looked like it was directing the air from the fan around the casing but I wasn't sure. Once I get things back together, I'll post how it's turned out. I spent most of today cleaning the engine. More pics to come.
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