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Old 05-21-2021, 01:20 PM   #1
Huntsman911   Huntsman911 is offline
 
Join Date: Mar 2021
Posts: 9
Engine dies after full throttle run, TT250

Hey all,

I recently put in a new jet kit and fixed up the carb and air intake on the TT250, but I've been trying to get the fuel mixture just right. I thought I had it, but now the bike is dying Everytime I do a run on full throttle. I notice it always dies after I climb a hill on the road where I have to use full throttle.

I figured it was too lean so I richened the carb via the needle, but it's still doing it. Am I still too lean? Or am I running too rich from the get go?

Thanks guys

Edit: I should note, it's when I let go of the throttle after the hill when the engine dies.



Last edited by Huntsman911; 05-21-2021 at 02:19 PM.
 
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Old 05-21-2021, 02:24 PM   #2
mtiberio   mtiberio is offline
 
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Location: Arlington, VA
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insufficient fuel flow, your petcock is your main jet
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Old 05-21-2021, 03:48 PM   #3
Huntsman911   Huntsman911 is offline
 
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Quote:
Originally Posted by mtiberio View Post
insufficient fuel flow, your petcock is your main jet
Petcock is open, I'll check the main jet. It should be bigger than stock with the jet kit upgrade


 
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Old 05-22-2021, 07:41 AM   #4
franque   franque is offline
 
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Location: Marseille, France -> Conakry, Guinea
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How does the fuel hose between the petcock and carb look? That's what he's talking about, and there's potentially crap blocking the petcock from within the tank.


 
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Old 05-22-2021, 07:51 AM   #5
TxTaoRider   TxTaoRider is offline
 
Join Date: Oct 2020
Location: Flower Mound Texas
Posts: 904
Like the others said, check for fuel flow. If the line isn't kinked, try disconnecting it and let it flow into a gas safe can or jar. Let it flow for a couple minutes. If it slows or stops, then remove the gas cap to see if it's a venting issue.

If could also be a low float level setting in the carb. The aftermarket carbs I've gotten havent been even close to correct.

Last but not least, if you're still running the stock spark plug, they have been known to have fouling issues.

Good luck and let us know what it was.
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2021 Tao Tbr7 - "Lucille"
Mods so far- Brozz swingarm, 21" front rim (Bridgestone Tw302 rear/Dunlop D606 front tires), Digital gauge cluster, pz30b pumper carb, after market hand guards, aftermarket brake and clutch levers, round fold away mirrors, Fly handlebars shortened slightly, 13t front sprocket
2009 Q-link Legacy 250
1982 Suzuki GS1100ES - "Jolene"



Last edited by TxTaoRider; 05-22-2021 at 11:16 AM.
 
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Old 05-22-2021, 10:44 AM   #6
DSM   DSM is offline
 
Join Date: May 2021
Posts: 40
What does the spark plug look like? That’s the first indicator of fuel mixture.


 
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Old 05-22-2021, 11:16 AM   #7
TxTaoRider   TxTaoRider is offline
 
Join Date: Oct 2020
Location: Flower Mound Texas
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Quote:
Originally Posted by DSM View Post
What does the spark plug look like? That’s the first indicator of fuel mixture.
Even more important, what does it look like right after it quits.
__________________
2021 Tao Tbr7 - "Lucille"
Mods so far- Brozz swingarm, 21" front rim (Bridgestone Tw302 rear/Dunlop D606 front tires), Digital gauge cluster, pz30b pumper carb, after market hand guards, aftermarket brake and clutch levers, round fold away mirrors, Fly handlebars shortened slightly, 13t front sprocket
2009 Q-link Legacy 250
1982 Suzuki GS1100ES - "Jolene"


 
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