Check my Diaphragm!

Speedy3 · January 26th, 2017, 04:10 PM

Hey there! Attempting to rebuild my carbs, and this is a first for me. Watching multiple videos, and they all say similar things about the diaphragms - DO NOT WARP/RIP THEM!

Okay, well I just took off the diaphragm cover, and I want your two cents. With the carbs off the bike, I did the little test of lifting the slides and letting them fall, and they both fell smoothly and at the same pace. But I still want to know the condition of these diaphragms, as this is a used bike that i am trying to basically rebuild (simply from my desire to know my bike forward and back) from the ground up.

Attached the photo. The rim does not form what Is think was a perfect circle. This is the first diaphragm I've ever seen on a crab, so go easy on me!

Speedy3 · January 26th, 2017, 04:17 PM

This is the other diaphragm:

Flying · January 26th, 2017, 04:48 PM

Those are fine. Just as long as the slides function as they should (smooth motion and sound) and there are no cracks or rips of any sort, those should last for as long as you own the bike.

sickopsycho · January 27th, 2017, 09:22 AM

Haha your title sounded dirty so it drew my attention. Yeah they can be a little funny to get back in sometimes. Be careful when you put the top cover back on to make sure you don't snag part of the diaphram that you're not supposed to. Make sure it's seated properly in the groove and if you need to you can carefully clean it off and let it dry, it should kind of shrink back down to the proper size.

Speedy3 · January 28th, 2017, 09:58 AM

Ha I can see how it could be taken in a slightly off color way! And thank you all for your .02. With only minor fiddling, I was able to seat them completely in their grooves and replace the covers without pinching the diaphragms. I'm about to start a valve clearance, so we'll see how well everything goes back together there!

sickopsycho · January 28th, 2017, 10:06 AM

Good luck and have fun! Remember, as the valves wear they get tighter, so I always set to the loose end of the specs. Also a torque wrench is an absolute must!

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January 26th, 2017, 04:48 PM	#3
Flying ninjette.org sage Name: - Location: somewhere cold Join Date: Jun 2013 Motorcycle(s): 2010 Ninja 250 Posts: 596 Blog Entries: 1	Those are fine. Just as long as the slides function as they should (smooth motion and sound) and there are no cracks or rips of any sort, those should last for as long as you own the bike.

January 27th, 2017, 09:22 AM	#4
sickopsycho One ugly son of a gun. Name: Andrew Location: Raleigh, NC Join Date: Sep 2016 Motorcycle(s): 2012 250 Posts: 167	Haha your title sounded dirty so it drew my attention. Yeah they can be a little funny to get back in sometimes. Be careful when you put the top cover back on to make sure you don't snag part of the diaphram that you're not supposed to. Make sure it's seated properly in the groove and if you need to you can carefully clean it off and let it dry, it should kind of shrink back down to the proper size.

January 28th, 2017, 09:58 AM	#5
Speedy3 ninjette.org member Name: Kyle Location: Raleigh, NC Join Date: Jan 2017 Motorcycle(s): 2008 Triumph Speed Triple (Blazing Orange); 2010 Nina 250r (Race Project) Posts: 97	Ha I can see how it could be taken in a slightly off color way! And thank you all for your .02. With only minor fiddling, I was able to seat them completely in their grooves and replace the covers without pinching the diaphragms. I'm about to start a valve clearance, so we'll see how well everything goes back together there!

January 28th, 2017, 10:06 AM	#6
sickopsycho One ugly son of a gun. Name: Andrew Location: Raleigh, NC Join Date: Sep 2016 Motorcycle(s): 2012 250 Posts: 167	Good luck and have fun! Remember, as the valves wear they get tighter, so I always set to the loose end of the specs. Also a torque wrench is an absolute must!