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The factory messed up my 1150!

  • Thread starter Thread starter Guest
  • Start date Start date
G

Guest

Guest
Here's a good one for ya:

My 1150 just turned over 6100 miles. So I decide to do a valve check and give her a tune up and complete detail. I've never even taken off the fuel screw caps, so I decided I'd do that too since I now have a Colortune, and I have always had two plugs (2 and 3) that were a tad leaner than the other ones.

When I put my bike into storage originally, the carbs were taken off and flushed and stored properly. They have never been taken apart for anything except to empty the bowls. So I'm taking them apart, and I noticed that Suzuki put the main jets in wrong! They are supposed to have 120's on 1 and 4, and 122.5's on 2 and 3. Instead they were put in 122.5, 120, 120, 122.5. 1 and 4 fuel screws were set at 3/4 turns out, and 2 and 3 were set at 2 turns out. So sounds like they even tried to compensate for the mix-up!

So now (23 years later) everything is back where it should be. I'll be hooking up gas and synching/colortuning in the morning. :-?
 
renobruce said:
Here's a good one for ya:

My 1150 just turned over 6100 miles. So I decide to do a valve check and give her a tune up and complete detail. I've never even taken off the fuel screw caps, so I decided I'd do that too since I now have a Colortune, and I have always had two plugs (2 and 3) that were a tad leaner than the other ones.

When I put my bike into storage originally, the carbs were taken off and flushed and stored properly. They have never been taken apart for anything except to empty the bowls. So I'm taking them apart, and I noticed that Suzuki put the main jets in wrong! They are supposed to have 120's on 1 and 4, and 122.5's on 2 and 3. Instead they were put in 122.5, 120, 120, 122.5. 1 and 4 fuel screws were set at 3/4 turns out, and 2 and 3 were set at 2 turns out. So sounds like they even tried to compensate for the mix-up!

So now (23 years later) everything is back where it should be. I'll be hooking up gas and synching/colortuning in the morning. :-?
Click to expand...

that explains why you only beat that V-ROD by .03 seconds!
 
I thought the inside cylinders (2&3) would run hotter so a leaner jet would be needed.
 
They run bigger jets in the middle because of the heat. A bigger jet would richen the center two, making them run cooler.
 
84 GS1150

Type----------------- Mikuni BS36SS
I.D. NO. -------------00A10
Bore -----------------36mm
Idle r/min----------- 1100+or- 100r/min
Fuel level------------ 3.0 +- 0.5 mm
Float height---------- 21.4 +- 1.0 mm
Main jet ------------- #120(nos.1&4),#122.5(nos 2&3)
jet needle------------ 5D14
Needle jet ----------- X-3
Pilot jet ---------------#45
By pass--------------- 0.9,0.8,0.9 mm
pilot outlet------------ 0.9 mm
Valve seat------------ 2.0 mm
Starter jet------------ #32.5
Pilot screw------------ PRE-SET (2 turns back)
Throttle valve--------- #130
pilot air jet------------- #125
Throttle cable play-----2-3 mm
choke cable play-------0.5-1.0 mm
__________________
:rolleyes:
 
do you think you can claim a set of replacement carbs under the manufacturer's warranty? :D





what??? with 6100miles the bike is practically NEW, eh?


.
 
psyguy said:
do you think you can claim a set of replacement carbs under the manufacturer's warranty? :D
Click to expand...
No but you could try for a A.W.A. (after warranty adjustment)!

"I'm sorry sir and yes I understand it's only got 6100 miles, but it is a little to old..."
"but we have this little museum, WANNA SELL IT?"
 
This has to be the one and only time a factory has had things messed up from the get go. Never happens... :rolleyes:
 
Dave8338 said:
This has to be the one and only time a factory has had things messed up from the get go. Never happens... :rolleyes:
Click to expand...

Yes, I'm sure mine was the only one.* I'm surprised I didn't notice a performance issue. Maybe it's because I'm at high altitude (5,200 ft.) or because I've never ridden another 1150. She should run better!
 
renobruce said:
Yes, I'm sure mine was the only one.* I'm surprised I didn't notice a performance issue. Maybe it's because I'm at high altitude (5,200 ft.) or because I've never ridden another 1150. She should run better!
Click to expand...

I ran my 1150 with 122.5 on all cylinders. It seemed to run slightly better than with the stock arrangement. Ran it about 50K miles like that, no problems, and it gets hot in So Fl.

Earl
 
renobruce said:
And maybe throw in some pics since she's sooo clean right now!
Click to expand...
worthless.gif
 
Good find Bruce. Just goes to show "factory" installed still means installed by a human being.
 
Steve said:
worthless.gif
Click to expand...

Synch is done, and plugs are colortuned. The pilots ended up at 1 3/4 out on 1 and 4, and 1 5/8 out on 2 and 3. I'll do some plug chops tomorrow.

Pics? Well, I still need to put the body parts and gas tank on, and polish the exhaust. But here's one with her clothes off:

100_2454.jpg
 
Glad you like them, psy. While the smilies are down on this site, I am using some from another site where I have posting (and pilfering) privileges.
icon_smile.gif


.
 
I'm shipping the carb-set from my 81 GS850 to RenoBruce and see if his magic disassembly process can determine what the factory did wrong to mine!
 
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