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Post by scjbob on Sept 17, 2011 13:47:39 GMT -6
OK. After all this time I finally got the scooter started! It took a new coil to make it happen. Now that I have it running I am experiencing bogging when hitting the throttle. Here's the scenario: Body panels are still off the frame. Needs to idle at about 2000 to keep it running. While on the center stand I throttle up to about 4,000-5,000 and it wants to bog. Where should I start? Fuel mixture screw? Keep in mind that I've already cleaned the carb (twice), replaced all fuel and vacuum lines, adjusted the valves, tested the enricher, and checked/tightened electrical connections.
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Post by scjbob on Sept 5, 2011 18:26:23 GMT -6
Thanks for the tip. Now that I am back for a few days I will try to find some time to attack this. The summer is quickly leaving us and it would ne nice to put some miles on this scooter.
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Post by scjbob on Aug 22, 2011 19:55:32 GMT -6
Thanks JR. I have a crazy week and will be traveling from this coming Wednesday through the following 10 days so I will not be able to get to the tests on this CDI/Coil for a time. But I will update you when I get back home and give it a go. Thanks for the help. I'll let you know what I find.
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Post by scjbob on Aug 21, 2011 14:23:11 GMT -6
The wire color coding is: *Open *Black/Brown *Open *Open *Blue/Yellow *Green *Black/Yellow *Green/White I have a nice multimeter but not much experience using one. I saw a sticky post of your on the basics of CDI, Coil and Stator. I assume I need to check for voltages and grounds beginning with the CDI. But the color codes on my CDI don;t match any of the colors in the posts on the website. Bob Attachments:
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Post by scjbob on Aug 21, 2011 13:08:58 GMT -6
Hi JR,
Well I finally had some time today to finish off all the vacuum and fuel lines. After reinstalling the airbox and hooking up the battery I tried to start it again. Still cranks but no start...So I pulled the plug again and checked for spark. (By the way the plug is not wet but I can smell fuel on it.) Now there is no spark at all so it looks like the cause of the weak spark has become pronounced. While I had the plug out I checked compression with the simple thumb method. It blows my thumb right out of the hole. So now I'm suspecting that it could be the coil, the CDI or the connections to these components.
That being the case I am now in uncharted diagnostic territory. I've never been good with solving electrical problems. Where should I start? (assuming that I have already checked the connections and they look fine).
In my next post I will attach a picture of the CDI and it's 5-wire connector.
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Post by scjbob on Aug 17, 2011 19:04:02 GMT -6
Funny that you ask about the spark. When I checked it I thought it appeared a little weak. Certainly wasn't a strong blue spark. What would a weak spark indicate to you?
And I am getting good fuel flow to the carb but maybe my method is suspect. I pulled the fuel line from the carb, cranked the engine and saw a pulsating stream. When I removed the carb it had about an ounce and a half in it. I never smelled a strong fuel odor so I don't suspect flooding. The plug was not wet when I removed it either. I squirted about 5 ccs of fuel into the top vacuum port but still didn't get any combustion. That kinda threw me for a loop.
I haven't checked for compression but I did adjust the valves. I made sure it was at TDC when doing so. I was unable to get the feeler guage to slip between the valve stem and the tappet. (am I describing this correctly?) So I adjusted both according to the clearances called for on this engine (.004" on the intake side....004"-.006" on the exhaust side. I settled for .005" there)
I just haven't completed everything to retry starting it yet. I probably won't have time to get to it again until this weekend. But thanks for the help. I'll post an update when I have one.
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Post by scjbob on Aug 16, 2011 20:47:23 GMT -6
I bought this scooter new about 18 months ago. I failed to do a full PDI at that time. I put 300 miles on it and it has decided to refuse to start. It cranks fine. Gets spark. Fuel flow OK. So here's what I have done so far:
1) removed, cleaned and reinstalled carb
2) checked all fuel and vacuum lines. I'm in the process of replacing all of them with real American rubber. Several clamps were missing so I am now using zip ties.
3) replaced a leaking fuel filter
4) discovered a broken filter in the fuel line going from the top of the gas tank to the charcoal cannister (anti-fuel spill) and replaced it.
5) Adjusted valves. They were a little tight because I could not get a .004 into the intake side or a .005 into the exhaust side. All is good now
6) checked the enricher (functions properly)
7) attempted to adjust idle at several different levels. I did this prior to removing all the panels and commencing with the PDI.
8) changed oil but still need to change radiator and crankcase fluids.
Once I'm finished with the hoses and fluids I'll hook the battery back up and give her a go. Am I missing anything?
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Post by scjbob on Aug 15, 2011 20:30:46 GMT -6
Can you guess by the picture why I needed to join this great site? I have a 2009 Tank 260 with only 350 miles on it. I've had a lot of fun (frustration) with this scoot since buying it a year and a half ago. I live in Eastern PA at the moment. I have owned 3 motorcycles in my lifetime and haven't had as much trouble with all three of them as I've had with this thing. But I don't give up easily. I'll be starting a new thread on the history of my current dilemna so I won;t bore you with it here. Glad that I found this site. Bob Attachments:
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