March 26th, 2017, 01:04 PM | #1 |
ninjette.org member
Name: mark
Location: North Texas
Join Date: Feb 2017 Motorcycle(s): 04 250R Posts: 27
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Only runs on full throttle
And it will only run about 2,000 RPM. Carb was just rebuilt by pro after I rebuilt it and it is no better than when I did it. Spark is fine. Compression is good (R 192 L 179). I do not think there are any vacuum leaks. Fuel is getting to carbs but I do not know how much.
Engine will rev up with a shot of starter fluid. So it is a fuel delivery prob? I took the petcock apart and cleaned it out before trying any of this and it was in poor shape but is spotless and flows now. Could that diaphragm thingy have anything to do with it? I just cannot for the life of me figure this out. Any leads would be much appreciated. I am so close! dying to ride it! |
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March 26th, 2017, 03:10 PM | #2 |
ninjette.org certified postwhore
Name: Gordon
Location: new york
Join Date: Sep 2009 Motorcycle(s): '95 DUCATI 900SS/SP '07 DUCATI SS800 '19 HONDA CBR650R Posts: A lot.
MOTM - Nov '18, Mar '17
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2000RPM at full throttle?
is your cable freeplay allowing the throttle plates to fully close? does the idle adjust knob have any effect? (turning down from your 2000RPM? does the choke offer any aid to starting? To confirm adequate fuel flow...each bowl should contain 45-50cc of gas, you can drain each into a container to measure OR use clear tube on drain nipple to determine height. How many turns are the pilot screws set at? Your rebuilder synched the throttle plates? (bench synch) Have you discussed with him? His recommendations?
__________________________________________________
gordon@customcarbservices.com Custom Carb Service www.customcarbservices.com |
1 out of 1 members found this post helpful. |
March 26th, 2017, 03:19 PM | #3 | |
ninjette.org member
Name: mark
Location: North Texas
Join Date: Feb 2017 Motorcycle(s): 04 250R Posts: 27
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Quote:
I pulled the bowls and I cannot be certain but it appeared to 7-8 teaspoons of fuel but I could be way off pilot screws...........hum? What are these pilot screws you speak of? carb was eye balled synced and I have made one of those sync contraptions our of bottles, stoppers and hose but I need it to idle on it's own before I attempt it. so, pilot screws. what effect do they have? I will do some google work. Thanks for your help! |
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March 26th, 2017, 03:31 PM | #4 |
ninjette.org certified postwhore
Name: Gordon
Location: new york
Join Date: Sep 2009 Motorcycle(s): '95 DUCATI 900SS/SP '07 DUCATI SS800 '19 HONDA CBR650R Posts: A lot.
MOTM - Nov '18, Mar '17
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i asked you 7 questions...you've answered just 3 or 4.
__________________________________________________
gordon@customcarbservices.com Custom Carb Service www.customcarbservices.com |
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March 26th, 2017, 07:56 PM | #5 | |
Rev Limiter
Name: Jay
Location: WI
Join Date: Jul 2013 Motorcycle(s): '06 SV650n, '00 Derbi GPR, '64 CA77 Dream 305, '70 CL450 Scrambler, numerous dirt bikes Posts: A lot.
MOTM - Jun '18, Oct '16
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Quote:
Sounds like there is a problem with the assembly or adjustment of the carbs. If you paid someone to do it, you should contact them. If they are a "pro" they will help you sort it out and re-check the assembly and adjustments. A real pro will do whatever it takes to make it right. |
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1 out of 1 members found this post helpful. |
March 27th, 2017, 04:18 AM | #6 |
ninjette.org member
Name: mark
Location: North Texas
Join Date: Feb 2017 Motorcycle(s): 04 250R Posts: 27
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well alrighty then.
2000RPM at full throttle? Yes is your cable freeplay allowing the throttle plates to fully close? Yes does the idle adjust knob have any effect? (turning down from your 2000RPM? does the choke offer any aid to starting? No and No |
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March 27th, 2017, 05:09 AM | #7 |
ninjette.org certified postwhore
Name: Gordon
Location: new york
Join Date: Sep 2009 Motorcycle(s): '95 DUCATI 900SS/SP '07 DUCATI SS800 '19 HONDA CBR650R Posts: A lot.
MOTM - Nov '18, Mar '17
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Your rebuilder.....
have you discussed with him? His recommendations? What methods did he use to clean? ultrasonic? sodablast? I stand at the ready to give them a second look, if you choose. Apparently something remains seriously wrong.
__________________________________________________
gordon@customcarbservices.com Custom Carb Service www.customcarbservices.com |
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March 27th, 2017, 11:15 AM | #8 | |
ninjette.org member
Name: mark
Location: North Texas
Join Date: Feb 2017 Motorcycle(s): 04 250R Posts: 27
|
Quote:
Thanks, if I cannot get it going I may holler at ya. I assume I would ship the carbs? |
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March 27th, 2017, 11:31 AM | #9 |
ninjette.org certified postwhore
Name: Gordon
Location: new york
Join Date: Sep 2009 Motorcycle(s): '95 DUCATI 900SS/SP '07 DUCATI SS800 '19 HONDA CBR650R Posts: A lot.
MOTM - Nov '18, Mar '17
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"Thanks, if I cannot get it going I may holler at ya. I assume I would ship the carbs?"
correct, I routinely do this, USPS Priority (using their medium box) about $13 to ship. I invite you to read some forum feedback from fellow members https://www.ninjette.org/forums/showthread.php?t=239678
__________________________________________________
gordon@customcarbservices.com Custom Carb Service www.customcarbservices.com |
1 out of 1 members found this post helpful. |
March 27th, 2017, 04:48 PM | #10 |
ninjette.org member
Name: mark
Location: North Texas
Join Date: Feb 2017 Motorcycle(s): 04 250R Posts: 27
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I am going to take it apart and see if maybe there was trash in the line when I put it back on. If not I will definitely send it your way.
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