It's carburetor time!
Okay, so it's time for me to do a smaller carb rebuild.
Since this is my first time delving into the world of carbs, I thought I would share my progress with you and maybe get some feedback if I'm going in the wrong direction some way down the road.
So... here is what I got to start with.
(http://i1117.photobucket.com/albums/k588/PussinBoots2011/IMG_0043.jpg)
I will need to convert these into early model gravity fed duel inlet design and re-jet since I'm fitting a pair of DualPod air filters.
I already removed the needle seats from my old carbs, as well as the two fuel fittings. RPM supplied me with a replacement fitting for the center fuel inlet as well as helping me pick the right jets for the job.
(http://i1117.photobucket.com/albums/k588/PussinBoots2011/IMG_0054.jpg)
1. Tools... check.
2. David R.'s carb manual... check.
3. Service manual... check.
4. Espresso... check.
5. Moretti... check.
6. Bach in the speakers... check.
:wacko2:
Fy tusan va bra!
Great work! I am looking forward to see more photos! :good2:
It will look good with those new filters on. (I'm awaiting mine this week too)
Did you buy new ones that is pump feed?
Cheers
Ken
Yes, those are brand new (pump fed) carbs from Randy...
:drinks:
Nice!
He too could have converted them for you, but you probably knew that :pardon:
They will look awsome on your bike, I'm sure :biggrin:
I also want to dig through them in order to change all fasteners into SS allen heads.
It's a learning experience...!
Yes, the SS is a must.
It's fun how much one can learn from this community!
Keep up the good work :good2:
My old carbs are knackerd, I have a good set from Frank that are FP so I will be doing the convert to GF and fastener kit as well. Its good to learn this stuff. Have fun with it.
Were you to tough with the Impact driver Mark? :lol:
Really learn a lot from this post. Keep'em coming :good:
Quote from: keand3 on March 10, 2013, 03:25:08 PM
Were you to tough with the Impact driver Mark? :lol:
Really learn a lot from this post. Keep'em coming :good:
I had only checked the slide diaphragm on carb #1, when I checked #2, #3 & #4 they had holes and thin spots. At $80 each the cost of my rebuild quickly exceeded the cost of new ones converted.
Yup those diaphragms are expencive.. And its always fun with something new.
Quote from: FJmonkey on March 10, 2013, 03:33:45 PM
Quote from: keand3 on March 10, 2013, 03:25:08 PM
Were you to tough with the Impact driver Mark? :lol:
Really learn a lot from this post. Keep'em coming :good:
I had only checked the slide diaphragm on carb #1, when I checked #2, #3 & #4 they had holes and thin spots. At $80 each the cost of my rebuild quickly exceeded the cost of new ones converted.
What about these diaphragms ? http://jbmindustries.com/Yamaha650.html (http://jbmindustries.com/Yamaha650.html)
George
Quote from: movenon on March 10, 2013, 08:21:21 PM
What about these diaphragms ? http://jbmindustries.com/Yamaha650.html (http://jbmindustries.com/Yamaha650.html)
George
Might be worth it if Frank had not sold me his carbs for a steal. Thanks for posting that, it may help others....
There you go stealing stuff.... :yahoo: :yahoo:
George
Quote from: movenon on March 10, 2013, 09:29:46 PM
There you go stealing stuff.... :yahoo: :yahoo:
George
Well... I told him I would buy him a $100 beer at the WCR.... :rofl:
Quote from: FJmonkey on March 10, 2013, 09:32:36 PM
Well... I told him I would buy him a $100 beer at the WCR.... :rofl:
Sapporo's Space Barley (with Barley actually grown in space), is $110.00 per six pack. Seems about right!
Dan
Quote from: FJmonkey on March 10, 2013, 09:32:36 PM
Quote from: movenon on March 10, 2013, 09:29:46 PM
There you go stealing stuff.... :yahoo: :yahoo:
George
Well... I told him I would buy him a $100 beer at the WCR.... :rofl:
Sounds like a good deal to me. I am looking forward to the rally.... Looks like the OZ team had a good run of it from there photo's.
George
Okay, the carb bodies were divided like so...
(http://i1117.photobucket.com/albums/k588/PussinBoots2011/IMG_0110-1.jpg)
I needed an impact wrench to get some of the screws on the alignment brackets out, even with brand new carbs.
Phew...
But I came across a problem when it came to removing the float hinge pins, they are really stuck in there. Really.
I find this strange, I had no problem removing the pins from my 28 year old carbs. And I'm afraid of using too much force on those aluminum posts in case they brake.
If I get the time, maybe I will go and buy a heat gun and see if some heat will help. :sorry:
(http://i1117.photobucket.com/albums/k588/PussinBoots2011/IMG_0119-1.jpg)
(http://i1117.photobucket.com/albums/k588/PussinBoots2011/IMG_0118.jpg)
Just use a small drift and drive only on the pin. Make sure the punch is not tapered ot the stantion can be broken.
There a small shoulder at the head end of the pin that are tight on new carbs.
Randy - RPM
A friend of mine in Georgia welds broken float posts. Works mint. :yes:
Quote from: racerrad8 on March 11, 2013, 10:30:00 AM
Just use a small drift and drive only on the pin. Make sure the punch is not tapered ot the stantion can be broken.
There a small shoulder at the head end of the pin that are tight on new carbs.
Randy - RPM
Okay, I'll continue trying.
Thanks Randy.
/Nat
I found this guide on YouTube which is helpful and good for visualizing what you are about to do:
Mikuni Carburetors - Disassembly, Cleaning, and Maintenance - 1985 Yamaha FJ600 - Part 1 (http://www.youtube.com/watch?v=MdfH_kodoSU#ws)
Mikuni Carburetors - Disassembly, Cleaning, and Maintenance - 1985 Yamaha FJ600 - Part 2 (http://www.youtube.com/watch?v=HrfV0kN1AQA#ws)
Mikuni Carburetors - Disassembly, Cleaning, and Maintenance - 1985 Yamaha FJ600 - Part 3 (http://www.youtube.com/watch?v=Z4VJHvqB9F0#ws)
Just wanted to share.
/Nat
Thanks! Just what i wanted to see :good2:
So I managed to remove the float pin using an automatic center punch, worked just like it should!
Also got the carb tops off, except for one screw that is giving me a really hard time... :mad:
Shit, those screws are tight AND soft! And since I didn't get the proper JIS screwdrivers I manage to mess the head up good and proper.
(http://i1117.photobucket.com/albums/k588/PussinBoots2011/IMG_0134.jpg)
Tried making a slot for a flathead screwdriver, but the screw melts under my fingers.
With the help of a vise grip I got the other ones out, but this one keeps slipping. My next strategy is filing the sides down so the locking pliers get a better grip.
And of course I managed to slip on another screw and make a dent in the carburetor top.
(http://i1117.photobucket.com/albums/k588/PussinBoots2011/IMG_0133.jpg)
(http://i1117.photobucket.com/albums/k588/PussinBoots2011/IMG_0132.jpg)
Hopefully nothing serious... :blush:
On another note, I have jetted the carburetors with Mikuni 40.0 pilots and 112.5 main jets supplied by Randy. I will be using Dual Pods and stock exhaust to begin with.
Do I need to get a set of adjustable main jet needles from RPM and shim my needles?
Also, I just got these back from the ceramic coater:
(http://i1117.photobucket.com/albums/k588/PussinBoots2011/IMG_0131.jpg)
So later I will also be using a Supertrapp 4-1 together with the Dual Pods. Would this warrant another change of jets?
Sorry for the newbie questions... :hi:
Nat
I had one like that too. Seem to make a big difference when I put a shifter, tight and directly on the jaws of the vice grip. I think It eliminates the torque going through the vice grip fulcrum point, so minimising.....nahh..I don`t know why it worked..just did? (and yes I was originally turning the jaws preciseley square to the screw axis).
^^^ ok, need a wee bit of help here...what the fuck did he just say....? Damn convicts.
shifter
The first pint of beer consumed after a work shift is over, usually sold at a fraction of the price of a regular pint. :hang1: :hang1: :hang1: :scratch_one-s_head: :scratch_one-s_head: :scratch_one-s_head: ???
George
Quote from: movenon on March 13, 2013, 07:09:12 PM
shifter
The first pint of beer consumed after a work shift is over, usually sold at a fraction of the price of a regular pint. :hang1: :hang1: :hang1: :scratch_one-s_head: :scratch_one-s_head: :scratch_one-s_head: ???
George
Shifter..An adjustable wrench on which you can shift the size of the jaws.--don`t get wrench mixed up with wench (no adjustment on the jaws and can damage nuts.)
Ok, got it. You bite the soft head, then use a wench to turn the screw.....makes perfect sense...thx Doug.
OH, an FJmonkey wrench ! oops just a "monkey" wrench ! I think the pint or maybe two would also help.... :yahoo:
George
Quote from: WhiteBeard on March 13, 2013, 04:00:34 PM
On another note, I have jetted the carburetors with Mikuni 40.0 pilots and 112.5 main jets supplied by Randy. I will be using Dual Pods and stock exhaust to begin with.
Do I need to get a set of adjustable main jet needles from RPM and shim my needles?
Later on I will also be using a Supertrapp 4-1 together with the Dual Pods. Would this warrant another change of jets?
Randy is guiding me through this one, so everything is good! :good2:
Quote from: WhiteBeard on March 13, 2013, 04:00:34 PM
Also, I just got these back from the ceramic coater:
(http://i1117.photobucket.com/albums/k588/PussinBoots2011/IMG_0131.jpg)
So later I will also be using a Supertrapp 4-1 together with the Dual Pods. Would this warrant another change of jets?
Sorry for the newbie questions... :hi:
Nat
Nat, The pipes look great. You won't need the short pipe with the Stainless muffler. The short pipe is used in conjunction with an aluminum SuperTrapp muffler.
Fred
Thanks Fred,
I had a hunch that I wouldn't need the middle pipe, but haven't gotten a chance to fit everything yet.
I'm a happy man!
:dance2:
Nat
Here are some photos of my rebuild routine, same procedure for each carb.
In order to transform my new FP carbs into GF carbs, I need to change out the needle seats with the ones from my old gravity feed carbs.
After removing the float bowl, I finally managed to remove the float pins using an automatic center punch like so...
(http://i1117.photobucket.com/albums/k588/PussinBoots2011/20130323_215722.jpg)
Sorry for the crappy pictures, I was trying to juggle my cell phone, taking photos while holding everything in place...
I followed David R.'s advice and sanded down the pin so it would fit a bit more loosely.
Remove the needle seat clamp:
(http://i1117.photobucket.com/albums/k588/PussinBoots2011/20130323_215937.jpg)
Then gently remove the needle seat and exchange it for your old one (with new o-rings from Randy).
(http://i1117.photobucket.com/albums/k588/PussinBoots2011/20130323_220032.jpg)
Change the needle seat clamp screw into an allen head (again, supplied by Randy):
(http://i1117.photobucket.com/albums/k588/PussinBoots2011/20130323_220815.jpg)
And while I was in there I also switched out the main jet:
(http://i1117.photobucket.com/albums/k588/PussinBoots2011/20130323_221022.jpg)
As well as the idle jet (note the famous "Happy Carburetor Halo Effect"):
(http://i1117.photobucket.com/albums/k588/PussinBoots2011/20130323_221312.jpg)
One carb done!
Screw the float bowl back on using new SS allen bolts, and you're good!
:drinks:
The FJ1200 pipe fitting (below) needs to be replaced by a FJ1100 (taken from my old carbs, above).
(http://i1117.photobucket.com/albums/k588/PussinBoots2011/20130324_143346.jpg)
Your outer carb should look something like this (upside-down):
(http://i1117.photobucket.com/albums/k588/PussinBoots2011/20130324_143832.jpg)
Also, the fuel pipe fitting between carbs 2 and 3 needs to be replaced by a pipe fitting (supplied by Randy).
I'm having problems getting this to fit though, I keep breaking the o-rings. Some oil to help it slide still doesn't seem to help.
Any tricks to this?
(http://i1117.photobucket.com/albums/k588/PussinBoots2011/20130324_144815.jpg)
Carbs are on the bike now, together with pod filters and SuperTrapp 4-1 exhaust.
Runs a bit rough and sounds like it's backfiring, will sync tomorrow and take some pictures. Very happy!
Nice work! Can't wait for the pics!
Quote from: keand3 on March 30, 2013, 04:09:11 PM
Nice work! Can't wait for the pics!
Some pics:
(http://i1117.photobucket.com/albums/k588/PussinBoots2011/757f08d9-1e86-4ad0-8ed0-5bcf3aaeb9ed.jpg)
(http://i1117.photobucket.com/albums/k588/PussinBoots2011/5b0dd6ee-3dce-40da-9394-c57b8d7830e6.jpg)
(http://i1117.photobucket.com/albums/k588/PussinBoots2011/260569f1-9d1f-4c17-9a75-1a0baf7e9e22.jpg)
nice looking bike mate, looks just like my standard 84 only a lot more polished :biggrin: