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Discussion Starter #1
Ok so, I've been having a problem with my TW for quite some time now. It will fire up and purr like a kitten, run fine without any problems for a few minutes (this time seems to be shorter now than it used to be when I first experienced the problem), then just sputter out and die, sort of like it were running out of gas. Sometimes it will start right back up, or it will fire a little but won't start, then it will usually start after sitting there dicking around for a couple/a few/several minutes. I've thoroughly cleaned out and inspected the carburetor, twice; it is perfect in there. I've also replaced the ignition coil with a brand new one, and replaced the CDI box with an ebay unit. I'm wondering if perhaps the CDI I bought on ebay is also faulty, and perhaps a NEW CDI would fix this problem? Any help/suggestions appreciated.
 

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Make sure your tank is flowing gas freely though the petcock. Maybe some trash has got it clogged up. Also, maybe your tank is not venting. Try running with the gas cap loose.
 

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By chance did you ditch the fart can, or remove the tank to service anything recently??
 

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Discussion Starter #4
Make sure your tank is flowing gas freely though the petcock. Maybe some trash has got it clogged up. Also, maybe your tank is not venting. Try running with the gas cap loose.


I have checked and cleaned the petcock, clean as a whistle...I have also tried running it with the gas cap off. Same deal. Thanks.
 

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Discussion Starter #5
By chance did you ditch the fart can, or remove the tank to service anything recently??


Fart can? lol? Charcoal canister? It's on there.
 

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Discussion Starter #7
CDI,mine had the same symptoms, put on a cdi, runs great


I thought that might well be the problem. Installed a "new" one from ebay which did not fix it. It's possible however that the one I bought was having the same problems (maybe the guy who sold it was a jackass and knew it didn't work...). I'm thinking it's possible the rectifier could be responsible.
 

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CDIs are an expensive part, before buying ANOTHER one, test anything else it can be. Look up the shop manual on the forum and run down the list progressively. If you looked through the electrical section you'd see the the testing for the CDI is to test everything electrical before it, and if none of that is faulty THEN replace the CDI.



Could still be fuel related, check your float bowl level, and make sure u still have plenty of gas in the bowl while the engine is running. Also check vent lines. When you start up are you starting on the choke? and have you tried it without the choke aswell?
 

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This may sound stupid, but maybe its the octane of your fuel. I put premium in mine and had the same problem as your describing. I emptied the tank filled up with 87 octane. Took a minute to burn out the old fuel, but once it got the lower octane it ran great. Just a thought
 

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Discussion Starter #10
I've already checked the vent system, and been inside the carb, twice just to make damn sure. It's all perfect in there. Not using choke other than when it would normally be necessary. I'll dive back into the manual and go through all the electrical crap as soon as I get a chance. Thanks. As far as the octane level: I've run 91 before without any trouble. However, I'm sure I have 87 in it now. Thanks.
 

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had exact same problem on small honda motors, would run for a few minutes then stop or only run with choke on. cleaned carbs many times didnt help. the only thing that worked for me was running seafoam in gas and the problem slowly went away.



i work on a lot of small motors and seafoam is the only cleaner i found that works, just give it a little time to work.



it also decarbonizes your engine if used in high mix ratios.



i use at least a 50/50 mix or even 100% for severe cases. it really works.
 

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had exact same problem on small honda motors, would run for a few minutes then stop or only run with choke on. cleaned carbs many times didnt help. the only thing that worked for me was running seafoam in gas and the problem slowly went away.



i work on a lot of small motors and seafoam is the only cleaner i found that works, just give it a little time to work.



it also decarbonizes your engine if used in high mix ratios.



i use at least a 50/50 mix or even 100% for severe cases. it really works.


When you say 100%, do you mean you run the engine on pure seafoam? It says you can't overdose, lol.
 

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yes 100% seafoam,at this strength it will clean everything from fuel tank to exhaust, your engine may smoke and stink while it cleans everthing out. help to let sit once its thougthouy the system.
 

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You may wish to pour a glass of whatever you like to drink and sit down and read my short novel on a problem much like this:



http://tw200forum.com/index.php?/topic/1950-cutting-out-quitting-at-speed-only-starting-and-running-fine-after-5mins/page__p__17197__fromsearch__1#entry17197



Maybe its not the same problem, but it sure sounds familiar..word of wisdom: when checking the float level with the clear-tube method (the factory bowl drain tube is perfect.. and already connected.. just disconnect the bottom end from the J and wedge it up between the plastics and tank), make sure you're holding the bike completely upright. I made that mistake the first time or four.
 
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