Air Filter Neck and Dynas - Cut?

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Dr. Frankenstein
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Air Filter Neck and Dynas - Cut?

#1

Post by Dr. Frankenstein »

I was trying to stuff my air filter back in my '78 GL1000 this afternoon, and it's always been a tight fit, but with the Dyna-type coils and wires in there, do you have to cut the air filter neck to get it in, and what does that surgery do - anything detrimental?
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CYBORG
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Re: Air Filter Neck and Dynas - Cut?

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Dr. Frankenstein wrote: Sat Nov 12, 2022 4:53 pm I was trying to stuff my air filter back in my '78 GL1000 this afternoon, and it's always been a tight fit, but with the Dyna-type coils and wires in there, do you have to cut the air filter neck to get it in, and what does that surgery do - anything detrimental?
I run a modifyed air filter neck on my 78. No problems
1978 custom GL1000
1977 custom with 1200 engine
1985 gl1200
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Dr. Frankenstein
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Re: Air Filter Neck and Dynas - Cut?

#3

Post by Dr. Frankenstein »

Actually, I managed to get it stuffed back in there, with just a slight deviation of the coil wire! Good to know though.

Although what's the purpose of the 10mm nut on the outer left side?
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Re: Air Filter Neck and Dynas - Cut?

#4

Post by Dr. Frankenstein »

It doesn't seem to go to anything except get in the way of trying to get the air filter housing in...
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Re: Air Filter Neck and Dynas - Cut?

#5

Post by CYBORG »

Dr. Frankenstein wrote: Sat Nov 12, 2022 6:08 pm It doesn't seem to go to anything except get in the way of trying to get the air filter housing in...
not sure what you are talkig about. Ihavent had mine off in some time. But there is some internal channeling for the breather fuction. The crank case breaths it's fume into the carb to be re-burned. Could be related to that.
1978 custom GL1000
1977 custom with 1200 engine
1985 gl1200
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CYBORG
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Re: Air Filter Neck and Dynas - Cut?

#6

Post by CYBORG »

CYBORG wrote: Sat Nov 12, 2022 9:08 pm
Dr. Frankenstein wrote: Sat Nov 12, 2022 6:08 pm It doesn't seem to go to anything except get in the way of trying to get the air filter housing in...
not sure what you are talkig about. Ihavent had mine off in some time. But there is some internal channeling for the breather fuction. The crank case breaths it's fume into the carb to be re-burned. Could be related to that.
just looked up a picture of the air cleaner. Bolt seems to hold an internal piece, relating to the fume breather
1978 custom GL1000
1977 custom with 1200 engine
1985 gl1200
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ritalz
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Re: Air Filter Neck and Dynas - Cut?

#7

Post by ritalz »

I thought he was referring to the snorkel part of the air cleaner box. I cut about an inch of the end to allow for the coil update when I installed some 1100 coils. That was a recommendation from someone on this forum several years ago.
Al

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Re: Air Filter Neck and Dynas - Cut?

#8

Post by CYBORG »

ritalz wrote: Sat Nov 12, 2022 10:01 pm I thought he was referring to the snorkel part of the air cleaner box. I cut about an inch of the end to allow for the coil update when I installed some 1100 coils. That was a recommendation from someone on this forum several years ago.
I was referring to the bolt head he said was on the left side of the filter housing. On mine the snorkel is shortened
and has a hose which draws air from a hole in the front of the fairing. It preasurises the air box. More speed, more pressure. The crank case lines are seal. Crank case is vented thru a seprate filter
1978 custom GL1000
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1985 gl1200
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gltriker
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Re: Air Filter Neck and Dynas - Cut?

#9

Post by gltriker »

Dr. Frankenstein wrote: Sat Nov 12, 2022 4:53 pm I was trying to stuff my air filter back in my '78 GL1000 this afternoon, and it's always been a tight fit, but with the Dyna-type coils and wires in there, do you have to cut the air filter neck to get it in, and what does that surgery do - anything detrimental?
10 years ago, I had the similar question. Wound up judiciously slicing off maybe 5/8inch, at an angle, off the lower half of the air inlet on my 1975 air filter housing.
I had a short piece of split wire loom at hand. I placed it on the spark plug wire, too. Just in case ;)
20221023_150459.jpg
20221023_150459.jpg (58.19 KiB) Viewed 404 times
Cliff (74yrs ;) )

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Dr. Frankenstein
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Re: Air Filter Neck and Dynas - Cut?

#10

Post by Dr. Frankenstein »

Cliff - I just did all that, loom included. It does make it a lot easier to get the air filter housing in.
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