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Fix those air leaks...

Nessism

Nessism

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Took out my (sadly) seldom ridden S over the Christmas holiday for a longer jaunt and at steady freeway cruising (80 mph) the oil temp was cresting 300 F after about 20 min. Upon slowing down noticed the idle was hanging indicating an airleak. The bike has seen a good many shorter rides but the symptoms didn't show up then.

The carb boot pipes and O-rings are new, but the airbox side boots were hard and shrunk up a little so the decision was made to replace them.

Took the bike out yesterday for a longer ride (post repair) and the hanging idle is gone. Also, the temp gauge hovered in the 250 F range. Still hot, but 50 F lower than before.

Going to pull the plugs and check color next, but the bike runs flawlessly so I don't expect to see much. Actually, the bike ran fine at freeway speeds even with the airleak, only it was obviously running lean. Guess that goes to show, don't judge your mixture by how well the bike runs. For you guys running pods or a modified exhaust, better double check your mixture otherwise you could be cooking your engine needlessly. And for guys with a stock intake system, airbox leaks are almost as bad as intake boot pipe leaks.

Gotta pay attention to details.:cool:
 
sedelen said:
CV model no doubt?
I've often thought of acquiring a set of outlet hoses (air box boots) for my
'79 GS1000E but there's no part number for it, I don't think my boots are leaking but they're probably as hard as nails. Thought about replacing them as to make it easier to reinstall the air box when and if I do.

http://www.boulevardsuzuki.com/fich...y=Motorcycles&make=SUZUKI&year=1978&fveh=2146
Click to expand...

I think you are correct. They don't make the airbox boots for the VM type carbs. They certainly don't for the 550s anyway. I imagine the situation is the same for the larger motors up to '79 as well.

When I did my intake system up I replaced all 8 boots, engine side and airbox side and have had no trouble since, the bike runs perfectly. I still check the colour of the plugs occasionally as per Ed's advice.
 
Suzuki_Don said:
I think you are correct. They don't make the airbox boots for the VM type carbs. They certainly don't for the 550s anyway. I imagine the situation is the same for the larger motors up to '79 as well.
Click to expand...

Suzuki saw fit to sell them separately for the '79 and earlier 750 and 850 but not the 550 nor 1000 for some reason. They're still available new as well. Somebody on here was going to do some measuring with new 750 hoses and see if they would fit a 1000 but I don't think he ever got back.
 
I don't see them listed in the parts fische for either the '79 GS850G or '77-79 GS750E. The GS750 does show a part number but it's identified as a "drain hose" which it isn't.
Either the item listing is wrong, or item number and part number. Item 10 in the fische.
http://www.boulevardsuzuki.com/fich...y=Motorcycles&make=SUZUKI&year=1977&fveh=2133

Same thing applies to the '79 GS850G, listed as drain hose. Item 10
http://www.boulevardsuzuki.com/fich...y=Motorcycles&make=SUZUKI&year=1979&fveh=2141
 
sedelen said:
I don't see them listed in the parts fische for either the '79 GS850G or '77-79 GS750E. The GS750 does show a part number but it's identified as a "drain hose" which it isn't.
Either the item listing is wrong, or item number and part number. Item 10 in the fische.
http://www.boulevardsuzuki.com/fich...y=Motorcycles&make=SUZUKI&year=1977&fveh=2133

Same thing applies to the '79 GS850G, listed as drain hose. Item 10
http://www.boulevardsuzuki.com/fich...y=Motorcycles&make=SUZUKI&year=1979&fveh=2141
Click to expand...


The part number is right, the description isn't I reckon. A few other sites I have just checked lists as 4 needed so that can't be the (single) drain hose. Plus the price looks about right. Strangely Robinsons lists it as an 'outlet hose'.
 
Dave8338 said:
Dang noobs like Ed... try to tell them to check everything. They never do... :D
Click to expand...

Hey Dave,

Charlie Brown once said (something to this effect)..."They say we learn from our mistakes. So that makes me the SMARTEST MAN IN THE WORLD"!!!!

Charlie and me have a lot in common!
 
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