gl1200 air cleaner mods.

[jgil1200]

Has anyone done any modifications on the stock gl1200 air cleaner.I. Have been rebuildinga 86 interstate for about a year. I dont see how this thing breathes at all the way the breather is hidden under the tank.has anyone done anything to help this problem??? Someone please tell me it is doable..

 

[slabghost]

It may seem very restrictive but it functions quite well as long as the carbs are right and filter is good. These are cv carbs and require some vacuum in the airbox to operate correctly. More open = less vacuum and more headaches.

 

[Ansimp]

slabghost » Wed Apr 15, 2015 10:10 pm[/url]":1h7t2hl1]
It may seem very restrictive but it functions quite well as long as the carbs are right and filter is good. These are cv carbs and require some vacuum in the airbox to operate correctly. More open = less vacuum and more headaches.

+1 on need some restriction, my CBRs won't rev above 5k without any filters, 12k+ with :yahoo:

 

[brianinpa]

Gerry and I were discussing this last weekend. He mentioned that the reason for the intake being designed the way that it is, is so that the heat from the engine can heat the air that is going into the air intake to help prevent the atomized fuel freezing. Gerry can expond on it, but his explainaiton made sense to me.

 

[mcgovern61]

I was talking to an Engineer friend of mine and we were going over my bike and I happened to mention the funny location and shape of the air intake on the 1100. He asked what I thought about it and I assumed it was space issue?

He laughed and said nope! It was his understanding that Honda designed the air intake to be at the top of the filter housing with the intake facing aft to maximize the heated air taken in.

I said. "heated air"?

He replied, "Yes"! The faux tank design captures heat from several sources including the engine, radiator and regulator/rectifier. That trapped heat is then drawn into the air inlet at the highest point of the tank which provides heated air for the carbs.

I didn't know how to reply other than, well, that makes sense doesn't it!

 

[ekvh]

At wfo, that air is piling in there faster than much heat can be added. I have run mine with more air, drilled holes around it. Result: some dead spots in the throttle. The experts all say, "Don't mess with the intake side unless you're prepared to jet." I am currently in the midst of putting v65 carbs on a 1200 plenum. I don't think the airbox is going to fit my current build, so it may go on my next project. I also ran a 1200 set of carbs on my hybrid (1200 with1000heads/cams) and it was an open filter, nothing but a top cover. It ran surprisingly well.

 

[bronko37]

mcgovern61 » Wed Apr 15, 2015 11:05 am[/url]":3rjc6kra]
I was talking to an Engineer friend of mine and we were going over my bike and I happened to mention the funny location and shape of the air intake on the 1100. He asked what I thought about it and I assumed it was space issue?

He laughed and said nope! It was his understanding that Honda designed the air intake to be at the top of the filter housing with the intake facing aft to maximize the heated air taken in.

I said. "heated air"?

He replied, "Yes"! The faux tank design captures heat from several sources including the engine, radiator and regulator/rectifier. That trapped heat is then drawn into the air inlet at the highest point of the tank which provides heated air for the carbs.

I didn't know how to reply other than, well, that makes sense doesn't it!

A very interesting idea. Not bad for an engineer :Egyptian: