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Discussion Starter #1
Hey guys. I dont know what the heck is going on. Installed the 130 main and did about 3.5mm shim on the needle, 2.5 turns on the screw, on my 2009. It runs AWESOME. Great power, smooth, no more ping etc... hot starts no problem. However, cold starts are a bitch now. Choke on, choke off, full throttle, no throttle, I've tried it all and the only thing that seems to start it is just holding the button forever with 1/4 throttle and after about wearing the battery down, it finally putters to life. Once going, its fine, runs great.



Is it a pilot jet issue? Any direction would be awesome. Thanks buds.
 

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I would try another 1/2 turn out on the pilot jet screw. Quick and easy to do.



Did you follow qwertys carb tuning guide? Or just go sick in a bigger jet and some shims and hope for the best? That's what I did first time out. Big mistake! Had more problems than I want to write about. Followed the guide, while time consuming it is the right way to do it and now my bike runs great.



Best of luck!
 

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Discussion Starter #3
Yuppers... read the Querty guide, its a fantastic write up. Also, I've torn down and rebuilt 20-30 bike carbs over the years and have always had great success, including big 'ol Bing carbs off my BMW that were also CV sytle and relatively similar to the TK. I must have missed something.



I really suspect the pilot. I'm positive I have it 2.5 turns out, but maybe mine's threaded a hair different. I'll mess with that. Rode it to work today with new Mobile 1, 47 tooth and oring chain and the damn thing is running like buttah... so smooth and happy and a tad more ooomph. Thanks man.
 

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Discussion Starter #5
Arrgghh... I have this little modified screwdriver to get in there and turn it without screwing with the carb and tried to tune it this morning before work, but could NOT find the damn screw slot... I got pissed! haha... So rode it anyway. First thing I'm doing when I get home. Thanks man.
 

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Discussion Starter #6
I checked the shim, good. I tried everything from 2 turns to 4 turns on the pilot screw... does nothing. Its still acting like its flooded on cold start. Once hot and running, it runs great. I'm starting to get frustrated. What did I screw up???



Thought - Its a CA bike, and I took off the canister. I routed the breather line from the carb directly to the tank breather where the can ran inbetween. Could I have a vaccum issue?
 

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I'm not familiar with the CA bikes, could be the problem. Have you checked the float level height? Maybe the float got bent. Also the boots between the air box and carb and carb and cylinder are easily cracked and can be the source of headaches.
 

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Discussion Starter #8
I was VERY careful when changing the jet, the float was fine. Like I said, I've done this dozens of times with no issues, that's why I'm confused... And my bike is an 09 that looks like it came off the showroom floor, all the rubber is super clean.



So get this... Knowing there's just two things involed, fuel and spark, thinking I had the fuel right... I next suspected spark. Then it dawned on me, I've never even looked at the plug. I ran down to the local moto store at lunch, pulled out the trusty dusty tool kit and pulled it. Nice light brown sheen and clean... hmmm, what's this? A "Denso" plug, aint that some auto parts store shit they put in lawnmowers? It looked cheap and to make things worse, it was barely finger tight.



I went in and they had the DR8EA, they were out of the iridium, so I took it, installed it and of course is started right up (it was hot) and ran great back to the office then home. So I go out this morning when cold, thinking it would be too damn easy of fix to do anything... and hit the button with choke fully on, and it fired right up on the second TDC cycle.



Could it really be that easy? A goofy cheap plug?
 

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Discussion Starter #10
hahaha... not complaining, I'm just shocked it would be something that easy. But you're right, if that's it, I'll take it! It would be a first.
 

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Good job on figuring out the spark plug. I probably would have spent a month dinking with the curb on that one.
 

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Discussion Starter #13
Three things... fuel, spark, and.... air (oxygen).






Yes, Check the easy stuff first.




Jb


OK Mr. Details... ha!
I guess we can keep going, compression, timing... I stopped shorter is all.
You're right though.



Good job on figuring out the spark plug. I probably would have spent a month dinking with the curb on that one.


I just about did. Almost started tearing down the carb again. It fired right up again this morning, so I guess that was it. I'm still shocked.
 
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