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Old January 22nd, 2024, 06:53 PM   #1
JayStreetfighter04
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Idles great until put under a load

I have an 04 that I have been chasing issues with and need some more help. I replaced the Chinese carb with an oem carb, then traded/bought for a ducatiman refurbed carb, added back a factory airbox, and replaced the spark plugs. The bike started when I put the new carb on and idled great I got excited tried to ride and the bike loses power and wants to die when you stop, you can restart the bike and it idles again and sounds good but does the same thing. I don’t know what to check next.
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Old January 23rd, 2024, 06:06 AM   #2
ducatiman
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MOTM - Nov '18, Mar '17
total, overall mileage on bike? Petcock is operational? Fresh fuel?
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Old January 23rd, 2024, 09:40 AM   #3
JayStreetfighter04
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Quote:
Originally Posted by ducatiman View Post
total, overall mileage on bike? Petcock is operational? Fresh fuel?
Just short of 10k, fresh fuel, petcock is allowing fuel to get to the carb as far as I can tell.
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Old January 23rd, 2024, 09:53 AM   #4
ducatiman
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at 10k, def suggest a valve clearance check. You have screw and locknut type valves...no need to pull cams.

using a catch can, remove the fuel exit hose from the petcock, crank for a few seconds and if working, your can should fill up in a few moments with fuel exiting the petcock and should stop when you stop cranking.

Let me know results.
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Old January 23rd, 2024, 10:45 AM   #5
JayStreetfighter04
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Name: Jeremy
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Quote:
Originally Posted by ducatiman View Post
at 10k, def suggest a valve clearance check. You have screw and locknut type valves...no need to pull cams.

using a catch can, remove the fuel exit hose from the petcock, crank for a few seconds and if working, your can should fill up in a few moments with fuel exiting the petcock and should stop when you stop cranking.

Let me know results.
For sure will do, little update though today it’s much warmer than it has been and I was able to ride it while choked around the block just fine, still dies unchoked.
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Old January 23rd, 2024, 11:00 AM   #6
JayStreetfighter04
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Name: Jeremy
Location: 1513 Hotiyee Ave
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Motorcycle(s): 04 ninja 250

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Quote:
Originally Posted by ducatiman View Post
at 10k, def suggest a valve clearance check. You have screw and locknut type valves...no need to pull cams.

using a catch can, remove the fuel exit hose from the petcock, crank for a few seconds and if working, your can should fill up in a few moments with fuel exiting the petcock and should stop when you stop cranking.

Let me know results.
Ok so the petcock doesnt seem to be functioning, when its in the on position nothing comes out fuel does come out when in the res position but free flows. Order a new petcock correct?
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Old January 23rd, 2024, 11:07 AM   #7
ducatiman
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MOTM - Nov '18, Mar '17
can rebuild, i've got the parts right here. $50 plus parts. Let me know, ok?
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Old January 23rd, 2024, 11:19 AM   #8
ducatiman
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MOTM - Nov '18, Mar '17
to clarify.....if my wet testing (after rebuild) reveals any leakage, NO CHARGE to you (parts included)

An FYI.....my famous, softer than stock diaphragm o-ring is included, swapped automatically.
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