How to replace discontinued GL1000 Carb Intake Boots with GL1500 parts


Step-by-step tutorials on how to maintain and fix your GL1000
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PedroTQ
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How to replace discontinued GL1000 Carb Intake Boots with GL1500 parts

Post by PedroTQ » Fri Aug 02, 2019 10:09 pm



G'day to All,

Just passing this on to all that have Air/Vacuum leaks that cause; slow to return to idle, erratic idle, erratic running and possibly other symptoms???

The rubber carburettor insulators on my and probably all GL-1000's are hard as glass, thus creating the possibility of an air/vacuum leak.

The Insulator itself is vulcanized onto the air intake manifold and are unavailable new.


Well this is what I am doing, and I hope it works out well (cant see why not).

I am replacing them with GL-1500 carburettor insulators which are available.

Firstly I used a bench vice to squash the old rubbers off, working my way around and squashing the rubbers in until the rubber gave way.

I then clamped them together using a scrap piece of steel sandwiched between them to hold them together, then used a small screwdriver to scrape away the remaining rubber before treating them to the wire brush wheel.

I then fitted them to the carbs.

Just have to get some thin hose clamps to finish them off. :D :D :D
Attachments

Original carb insulators vulcanized to the intake manifold.
Original carb insulators vulcanized to the intake manifold.


Squish the old rubber this way.
Squish the old rubber this way.


and every other way until the rubber gives way.
and every other way until the rubber gives way.


You end up with one pair for one side of the engine.
You end up with one pair for one side of the engine.


Using a scrap piece of flat bar held into the vice and some long enough bolts and nuts.
Using a scrap piece of flat bar held into the vice and some long enough bolts and nuts.


I bolt them together just snugly to hold them there while I clean them.
I bolt them together just snugly to hold them there while I clean them.


I used a small screwdriver to scrape as much of the remaining rubber off, then touched them up with the wire wheel.  Next will be a Dremmel wheel (later one day).
I used a small screwdriver to scrape as much of the remaining rubber off, then touched them up with the wire wheel. Next will be a Dremmel wheel (later one day).


A pair of aftermarket GL-1500 carburettor insulators that I will be using.
A pair of aftermarket GL-1500 carburettor insulators that I will be using.


The 1500 insulators fit nice and snugly on the carbs.
The 1500 insulators fit nice and snugly on the carbs.


The intake manifolds slip into the insulators perfectly, just need some nice SS hose clamps.
The intake manifolds slip into the insulators perfectly, just need some nice SS hose clamps.



#1 - 1975 GL-1000 - showroom
#2 - 1976 GL-1000 -DJP sidecar fitted
#3 - 1978 GL-1000 - RIP
#4 - 1975 GL-1000 - RIP
#5 - 1978 GL-1000 - RIP
#6 - 1988 GL-1500 - HRD sidecar fitted
#7 - 1998 GL-1500C - Valkyrie
#8 - 1990 GL-1500 SE - Naked 90

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DenverWinger
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Re: CHow to replace discontinued GL1000 Carb Intake Boots with GL1500 parts

Post by DenverWinger » Sat Aug 03, 2019 5:26 am

Good find that the 1500 insulators fit! That said, they will likely work on the 1100/1200's too.

A little heat on the old ones would help soften the rubber so they don't fight quite so much getting them off. Try a heat gun on "low" or put them in the oven (when wife isn't looking) at 200 degrees for 10 mins..
♫ 99 Little Bugs in the Code, ♪
♪ 99 Bugs in the Code. ♫ :(
♫ Take one down, Patch it around, ♪
♫ 127 Little Bugs in the Code. ♫ ♪ :shock:

~Mark

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ekvh
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Location: Grand Forks, ND
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Re: How to replace discontinued GL1000 Carb Intake Boots with GL1500 parts

Post by ekvh » Sat Aug 03, 2019 8:08 am

1200’s are considerably smaller than 1000/1100. I doubt they will work. Great find for old ones though.

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flyday58
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Re: How to replace discontinued GL1000 Carb Intake Boots with GL1500 parts

Post by flyday58 » Sat Aug 03, 2019 7:04 pm

Timely thread. I'm sure we will all face this insulator issue at some point. It's a big deal getting OEM insulators for CB750s, good to have a solution at hand now for GL1000s. I may try it on one of mine intake tubes to see how well it works.
"Who left the fridge open?" Tug Speedman

cfairweather
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Re: How to replace discontinued GL1000 Carb Intake Boots with GL1500 parts

Post by cfairweather » Sun Aug 11, 2019 9:52 pm

Thank you for this excellent tip.



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