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Discussion Starter #1
Honda Service Bulletin GL1200 #10 June 1985
Anybody have a copy (please post it) or know where it can be downloaded from?
 

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I haven't found the service bulletin, but here is some information about it.

SERVICE BULLETIN NUMBER: GL1200 #10
Bulletin Sequence Number: 051
Date of Bulletin:June 1985
NHTSA Item Number: 80102
Make: HONDA MOTORCYCLE
Model: GL1200
Year: 1985
Component: FUEL:CARBURETOR:SINGLE:OTHER PART
Summary:
GL1200 ASPENCADE/INTERSTATE LOW SPEED DRIVEABILITY IMPROVEMENTS- HESITATION
UNDER LIGHT ACCELERATION BETWEEN 2000 AND 3000 RPM. DRIVEABILITY KITS ARE
AVAILABLEFOR IMPROVED PERFORMANCE. DRIVEABILITY KITS INCLUDE NEW SLOW JETS,
NEW JET NEEDLE, AND NEW O-RINGS FOR INTAKE MANIFOLDS AND AIR SUPPLY TUBES.
HONDA GL1200 ASPENCADE/INTERSTATE MODELS (1984 49 STATE MODELS AND 1985
CALIF. MODELS).

This is a link to a You Tube video about the bulletin.
 

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a TSB is not a govt. mandated recall or free parts 30 years later.
They are simply for the mechanics to look up odd problems- especially drive/ride-ability = cuts the amount of time wasted
looking for a solution if someone already found it!

If its a warranty issue Honda doesnt want to pay each claim with diagnosis time too- just pay for the repair itself --if the fix is already known.
Info is shared thru the dealer network via corp.
Statements based on my years as a corporate wrench
 

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Discussion Starter #5
"mechanics to look up odd problems- especially drive/ride-ability = cuts the amount of time wasted
looking for a solution if someone already found it"

Exactly what I wanted, the stuff the mechanics saw that presented the solution, so I could check out my carbs and see if it had been done..

Not a good idea? Cause my 85 Aspencade has the exact driveability issue as stated "HESITATION
UNDER LIGHT ACCELERATION BETWEEN 2000 AND 3000 RPM" so if they know what should be done, why can't I find out?
 

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Typically a mark is applied to a part when a TSB or recall has been performed
Many people never go to the dealer service dept after purchase, so they never know about that TSB!
The very fact your bike has the exact symptoms means very good odds it has NOT been touched.

Buy the jet kit, dealer may want a small fortune, www.carbjetkits.com can probably help you out.
They have kits from stock to stage 3 for most bikes in the last 50 years.
There aren't that many different carbs on older bikes - one carb gets used on numerous models and makes

My 86 Shadow 1100 runs a stage 1 = 1 size up from stock, with Screamin Eagle/ harley rear exhaust...its louder and faster-- but killed mpg
 

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the TSB does not tell you how the first guy figured it out- just the symptoms and the fix.
If a customer complained of that problem, it was normally done as warranty.

You cant find out more because its been so many years- that paperwork is gone and only micro-fiche copies still exist..possibly in the Library of Congress!
Back in the day- at Mazda- there was a thick binder with TSBs that was getting updated every week, and techs were briefed weekly on new ones.
 

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In the video he says to take the vacuum cover off the carbs and look at the jet needle. If it is marked with "ICS" then the modification has been done.
 

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Discussion Starter #9
Got the Service Bulletin!!

And the parts list too...
The parts in the kit are as follows:
Slow Jet - 99103-437-0350
Jet Needle - 16151-MG9-682
Spring - 16050-MG9-004
Pilot Screw Plugs - 16016-MB0-671
In take Manifold O Rings - not available
Air Supply Tube - not available

So now I know and you do too!
 

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Discussion Starter #11
Nope, it means American Honda Powersports decided to release the Service Bulletin to me rather then to leave it to dealers only. They also decided to send me additional information in the form of parts rather than a service kit name / part number, which is listed as obsolete.

Apparently my argument regarding no dealers are wiling to work on a 30 year old bike rang true.
 

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10 years old- or current Gen of that model (1800s) is the dealers cutoff for most jobs on the Wing = per my local dealer.
They will do a few things for my 94....as long as I bring the wheel in loose~

great job on you froche!= getting Honda to totally hook you up, thats persistence paying off!!
 
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