Steve Saunders Goldwing Forums banner

1 - 20 of 29 Posts

·
Registered
Joined
·
26 Posts
Discussion Starter #1
Hi guys...
First thing thank you so much for these forums and all the "how to" vids and tutorials... a real goldmine for a newbie like me...
Ok so not patting myself on the back but since i got my 87 1200 Interstate last week I was able to pull out the carburetors bank and rebuild them with a kit bought online...
... added 10w40 oil... got rid of all the old gas... cleaned the fuel filter and all electrical connections i could find... new air filter... new gasoline...
Then carbs back in the baby and today I turned the key in for the first time... and it worked..
At least partially...
The engine idles but stalls whenever I want to turn off the choke or give it some gas...
I did a by the book set up on the pilot jet of 1and3/4 turn on the pilot jet...
One thing I noticed afterwards though is that all these rebuild kits are 102 main and 35 idle jets which are not the original setting...
So my feeling is that I'm extremely lean to the point where I can't cut off the choke without the engine stalling... am i right ? Anybody familiar with this particular combination on 102/35 and he adjusted the richness and the pilot ?
Thanks guys
 

·
Administrator
Joined
·
21,843 Posts
Rebuild kits are a very, very bad idea. Honda sells the needed o-rings and such for less money and there's no reason to replace the jets. And never use a non Keihen float needle.

However, I'll ask, are you running it without an air filter, or a foam filter?
 

·
Administrator
Joined
·
24,349 Posts
If the rubber parts fit your carbs you're lucky, the brass parts in aftermarket kits are junk and you don't need them anyway like Dennis said. Motorcycle carbs are very particular about having all the passages cleaned & float settings exactly right.
 

·
Average Goldwing Rider
Joined
·
1,026 Posts
I agree with Dennis about not using the brass parts in aftermarket rebuild kits. I have been successful with the rubber parts. The only brass parts in the Keihin CV carbs that wear are the needles and the needle jets. The hole in the jet should be round and the needle will have flats when they are worn.

I struggled a lot to get my '85 running correctly. You can read about it here: https://www.goldwingfacts.com/forums/2-goldwing-technical-forum/646521-jim-s-1985-gl1200i-diva-hits-road-ride-report.html

About the GL1200 carburetors. When they work they are marvelous. When they don't they are a pig. One thing about the mid 80s motorcycles, all the manufacturers were leaning the hell out of them to get them to pass emissions. Even with that, if the Keilins are correctly set up the bike will run well. I'm not sure about the '87, but my '85 was fitted with 35/108. Against the recommendations of the people on this forum I put 112 mains in. Once the problems with the intake, exhaust and carburetors were corrected the over sized jets were not required. All it did was make the bike smell like unburnt gas. Kind of like an old pre-emissions car. Not needed.

After reading this thread it is pretty clear the bike is running lean. You went a lot smaller with those jets. That would just make things worse. If it was me, I would buy a new set of jets from Jets R Us. Get the correct Keihin size. Then carefully look at all of the rubber and make sure the o-rings at the base of the intake runners are good. Keep us posted.
 

·
Registered
Joined
·
26 Posts
Discussion Starter #6
I agree with Dennis about not using the brass parts in aftermarket rebuild kits. I have been successful with the rubber parts. The only brass parts in the Keihin CV carbs that wear are the needles and the needle jets. The hole in the jet should be round and the needle will have flats when they are worn.
...

After reading this thread it is pretty clear the bike is running lean. You went a lot smaller with those jets. That would just make things worse. If it was me, I would buy a new set of jets from Jets R Us. Get the correct Keihin size. Then carefully look at all of the rubber and make sure the o-rings at the base of the intake runners are good. Keep us posted.
Thanks for all these inputsJamespal...
Something that confused me when I took the carbs apart : I didn't find any Orings anywhere except on the outside pilot...
Where are the bunch of Orings coming with the kit supposed to go ?
Also the floaters needles valves were completely stuck in their seats... I've tried everything but couldn't get them out without damaging them... so I had to replace at least these with new...
Another person on a different forum told me to shim the needles in order to compensate for the leaner jets ... what do you think ?
 

·
Premium Member
Joined
·
2,163 Posts
Reinstall the 108's?? if you still have them. No one has mentioned California series carbs are jetted different than the 49 states models. I know you are on the east coast, but motorcycles have wheels, and they move around.....
You don't shim to compensate for incorrect jetting. Some use a shim to lift the needle slightly to compensate off idle, but I've never found the need to on the 1200's. If they're clean, they work. After you've brought he carbs back to stock, you might want to open the pilots an extra 1/2-1 turn over recommended. Gas was a lot better when they designed these bikes. Since you replaced the needle and seat assy's, make sure your float level is correct.
And my book says 3 1/2 turns out. Not 1 3/4.....
 

·
Registered
Joined
·
26 Posts
Discussion Starter #8
Reinstall the 108's if you still have them. No .....
And my book says 3 1/2 turns out. Not 1 3/4.....
Thanks for your inputs GlHonda...

My Hanes repair manual for 1987 models like mine says 1.3/4 turn for non Californians models...
Did I miss something ?
 

·
Junior Grue
Joined
·
8,153 Posts
Thanks for your inputs GlHonda...

My Hanes repair manual for 1987 models like mine says 1.3/4 turn for non Californians models...
Did I miss something ?
My Honda manual says 1 3/4 for the 87 49State model and 3 1/2 for the 84 49State model.
 

·
Premium Member
Joined
·
2,163 Posts
Thanks for your inputs GlHonda...

My Hanes repair manual for 1987 models like mine says 1.3/4 turn for non Californians models...
Did I miss something ?
No. My bad. I used a PDF I had for the GL1200. My Honda manual does indeed say 1 3/4 initial opening for the '87. However, you'll probably end up around 3 turns doing the lean drop method anyway.
 

·
Registered
Joined
·
26 Posts
Discussion Starter #11
GlHonda...
Heard...

Also last time I'm putting 87 octane gas in my Wing tank... no wonder why there's more and more no ethanol fuel pump around here...
 

·
Administrator
Joined
·
21,843 Posts
87 octane is not contributing to the problem.

If you have a carburetor issue it is surely related to the rebuild kit you used. Do yourself a favor and start over. Run everything past us before you do/use it.

Did you pull the rack apart and soak, or do a sonic clean, on the individual carbs?
 

·
Registered
Joined
·
62 Posts
Sounds to me your slow jets are still partially plugged. Having to keep it choked as you described is often the first clue. With the choke on, will it increase RPM up to say 2500-3k and then allow you to take off the choke? If so, see my first comment. Good luck.
 

·
Registered
Joined
·
26 Posts
Discussion Starter #14
Sounds to me your slow jets are still partially plugged. Having to keep it choked as you described is often the first clue. With the choke on, will it increase RPM up to say 2500-3k and then allow you to take off the choke? If so, see my first comment. Good luck.
Sounds to me your slow jets are still partially plugged. Having to keep it choked as you described is often the first clue. With the choke on, will it increase RPM up to say 2500-3k and then allow you to take off the choke? If so, see my first comment. Good luck.
Hey John... the slow jets are brand new...
It's doing better since i followed the advice of a winger who told me to set up tbe pilot at 3 turns instead of the 1.3/4 per the book...
It's now idling without the choke... i still have problems going up in the rpm after 25% on the handle... just when the mainjet is taking over the slow jet from what I underdtood ...
So my 102 seems really too small...
I dug out the jets i Initially replaced and they are 105...
Im currently trying to unscrew them from the rest of their body... corrosion has sealed 3 of them...
I feel like I'm gonna be better off with buying some new 105 from jetsrus...

New source of stress... engine off I engaged the 1st gear and was able to move the rear wheel with my bare hands without efforts... whille engaging the 2nd gear I couldn't move the wheel as it should be ...
Does it mean my 1st gear is shot or did I forget something?
 

·
Administrator
Joined
·
24,349 Posts
New source of stress... engine off I engaged the 1st gear and was able to move the rear wheel with my bare hands without efforts... whille engaging the 2nd gear I couldn't move the wheel as it should be ...
Does it mean my 1st gear is shot or did I forget something?
Are you sure you got it in 1st gear? They won't always go in gear easily with the engine stopped and not moving. If you have been riding it you would know if there was a problem.
 

·
Registered
Joined
·
26 Posts
Discussion Starter #16
Are you sure you got it in 1st gear? They won't always go in gear easily with the engine stopped and not moving. If you have been riding it you would know if there was a problem.
Hi Dave (damn I love your yellow wing)
Well the contact was on and I saw the Neutral light turning off...
So i believe the 1st gear was actually engaged...
I tried several times to be sure... :frown2:
But no i didn't ride it ...
 

·
Administrator
Joined
·
24,349 Posts
Bump the starter button with the kill switch off, just enough to turn the motor over a half turn, or so.

Or just spin the rear wheel while pushing down on the shifter. And make sure the shifter isn't hitting something.
 

·
Registered
Joined
·
26 Posts
Discussion Starter #19
Ok guys thanks...
Good news i could separate the old 105 jets head from the tube...
Cleaning them is a major PITA...
...WD40 bath
... vinegar bath
Using only carbon fiber and nylon rods to avoid any scratches...
Getting there
 

·
Registered
Joined
·
26 Posts
Discussion Starter #20
Latest update...

After cleaning the hell out of the old 105 jets i put them back in the carbs this morning...
Well result is exactly the same...
. Starts with the choke
. Takes forever to get in temp
. Idles without the choke
. But when i try to go over 1200 rpm the engine stalls

Any idea what to try next ?
Thanks
 
1 - 20 of 29 Posts
Top