Pilot jets and idle mixture screws won't screw in

rustyshackelford · September 17th, 2017, 12:54 PM

So i was cleaning my carbs and went to screw the pilot jets and idle mixture screws back in and for some reason they just won't grab and go in. Both the female and male threads are in perfect shape. Any thoughts?

ducatiman · September 17th, 2017, 01:07 PM

Thats odd....are you putting them back in their correct locations?

rustyshackelford · September 17th, 2017, 01:33 PM

Yup. I double and triple checked with all the carb photos on the faq. And I tried both screws on both holes. It's bizarre.

jkv45 · September 17th, 2017, 06:21 PM

Post some pictures if you can.

I was thinking you may have had something mixed-up as well.

ducatiman · September 18th, 2017, 09:22 AM

Quote:

Originally Posted by rustyshackelford

Yup. I double and triple checked with all the carb photos on the faq. And I tried both screws on both holes. It's bizarre.

so what now, rusty?

rustyshackelford · September 18th, 2017, 09:42 AM

I figured it out. I am not a smart man. That's all I'll say the rest I'm taking to the grave.

jkv45 · September 18th, 2017, 11:07 AM

Quote:

Originally Posted by rustyshackelford

I figured it out. I am not a smart man. That's all I'll say the rest I'm taking to the grave.

Good to hear you got it figured out.

We all have those...

CaliGrrl · September 18th, 2017, 11:11 AM

Quote:

Originally Posted by rustyshackelford

I figured it out. I am not a smart man. That's all I'll say the rest I'm taking to the grave.

You forgot "righty-tighty" and were trying to screw them in counter-clockwise?

rustyshackelford · September 18th, 2017, 01:06 PM

Quote:

Originally Posted by CaliGrrl

You forgot "righty-tighty" and were trying to screw them in counter-clockwise?

Haha no but on that same level.

ducatiman · September 18th, 2017, 07:50 PM

but in the big scheme of things....

A:you did it
B: you learned for next time

***********************************************************
My learning experience for today....re doing a Harley Davidson (made by Keihin) 40mm CV "pumper" carb.....very similar to EX. For the accelerator pump Keihin used a diaphragm very similar to that used in the decel valve on your EX carbs. And a big, fat float valve...again so similar...but huge in diameter.

The pump diaphragm is decomposing...the float valve tip has a wear ring and the whole tip is tilted...so both parts are shot. The pilot mixture screw was frozen (I freed it) and everything is generally mucked and in need of refresh.

Sound familiar? a mid 2000 era Sportster sitting dormant for years. The owner picked it up for next to nothing. ...I'll order the required parts and easily knock this thing off. Reminds me to snap some before and after pics.

And I, too, have learned for next time.

rustyshackelford · September 19th, 2017, 03:44 PM

Quote:

Originally Posted by ducatiman

but in the big scheme of things....

A:you did it
B: you learned for next time

***********************************************************
My learning experience for today....re doing a Harley Davidson (made by Keihin) 40mm CV "pumper" carb.....very similar to EX. For the accelerator pump Keihin used a diaphragm very similar to that used in the decel valve on your EX carbs. And a big, fat float valve...again so similar...but huge in diameter.

The pump diaphragm is decomposing...the float valve tip has a wear ring and the whole tip is tilted...so both parts are shot. The pilot mixture screw was frozen (I freed it) and everything is generally mucked and in need of refresh.

Sound familiar? a mid 2000 era Sportster sitting dormant for years. The owner picked it up for next to nothing. ...I'll order the required parts and easily knock this thing off. Reminds me to snap some before and after pics.

And I, too, have learned for next time.

I sure did do it (eventually) and learned from it haha. I appreciate your help!

September 17th, 2017, 12:54 PM	#1
rustyshackelford ninjette.org member Name: Jay Location: Western North Carolina Join Date: Jul 2017 Motorcycle(s): 2007 Ninja 250 Posts: 17	Pilot jets and idle mixture screws won't screw in So i was cleaning my carbs and went to screw the pilot jets and idle mixture screws back in and for some reason they just won't grab and go in. Both the female and male threads are in perfect shape. Any thoughts?

September 17th, 2017, 01:07 PM	#2
ducatiman 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	Thats odd....are you putting them back in their correct locations? __________________________________________________ gordon@customcarbservices.com Custom Carb Service www.customcarbservices.com

September 18th, 2017, 07:50 PM	#10
ducatiman 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	but in the big scheme of things.... A:you did it B: you learned for next time *********************************************************** My learning experience for today....re doing a Harley Davidson (made by Keihin) 40mm CV "pumper" carb.....very similar to EX. For the accelerator pump Keihin used a diaphragm very similar to that used in the decel valve on your EX carbs. And a big, fat float valve...again so similar...but huge in diameter. The pump diaphragm is decomposing...the float valve tip has a wear ring and the whole tip is tilted...so both parts are shot. The pilot mixture screw was frozen (I freed it) and everything is generally mucked and in need of refresh. Sound familiar? a mid 2000 era Sportster sitting dormant for years. The owner picked it up for next to nothing. ...I'll order the required parts and easily knock this thing off. Reminds me to snap some before and after pics. And I, too, have learned for next time. __________________________________________________ gordon@customcarbservices.com Custom Carb Service www.customcarbservices.com

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September 17th, 2017, 01:33 PM	#3
rustyshackelford ninjette.org member Name: Jay Location: Western North Carolina Join Date: Jul 2017 Motorcycle(s): 2007 Ninja 250 Posts: 17	Yup. I double and triple checked with all the carb photos on the faq. And I tried both screws on both holes. It's bizarre.

September 17th, 2017, 06:21 PM	#4
jkv45 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	Post some pictures if you can. I was thinking you may have had something mixed-up as well.

September 18th, 2017, 09:42 AM	#6
rustyshackelford ninjette.org member Name: Jay Location: Western North Carolina Join Date: Jul 2017 Motorcycle(s): 2007 Ninja 250 Posts: 17	I figured it out. I am not a smart man. That's all I'll say the rest I'm taking to the grave.