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1978 Honda CX500, 1983 Honda GL650I
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115 Posts
We're talking about ambients differing by almost 50掳 on given days ....
Elevation about equal ....,
So, you might need a little choke on a cold morning. Temperature doesn't affect fuel-air mixture.
Regardless, a Minnesota bike with that low mileage only ever saw Texas weather, anyway.
 

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1978 Honda CX500, 1983 Honda GL650I
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115 Posts
In Texas , I never use choke on my other Shadow ...Don't need it on the new one , But does need a slight adjustment ..., The bike had 18,000 Minnesota miles ..., It does'nt get cold in my area . Unless you call 55掳 cold ....,
55 is downright balmy this time of year. In five months that will be t-shirt weather.
A 50 degree swing one day to the next isn't uncommon here in spring and fall.
Low mileage riders are almost always fair weather only. I suspect your bike was only ridden June thru August, when it's hot here. My annual group ride in 2021 saw 104F on June 6th!
 

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1978 Honda CX500, 1983 Honda GL650I
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115 Posts
If I don't shut off the fuel petcock at the bottom corner of the tank it will drip about one drop of gasoline per second, leading to quite a large puddle when I park the bike overnight.
I suspect you have a float valve that isn't sealing and the spilled gas is coming from the overflow.
 

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1978 Honda CX500, 1983 Honda GL650I
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115 Posts
And yet real contact cleaner will ruin resister plug capz... I believe it would do the same to a TPS...
I disassemble my plug caps to clean them and bypass the resistors (haven't found a source for replacements).
Are there alcohol-soluble materials in these things? That's surprising, given that electrical cleaners are generally alcohol based.
Admittedly, I don't know much about TPSs. My tech predates all that stuff.
 

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1978 Honda CX500, 1983 Honda GL650I
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115 Posts
You can probably use NGK aftermarket replacements.
You can get them straight, 90 like these and 45 too. Price is a little high on these.
A bike shop with a well stocked parts department should have them in stock at around $5.
S F
David Silver Spares has aftermarket replacements for the CX500 and variants. They're sans resistor, so I run them with R plugs.
 

Registered
1978 Honda CX500, 1983 Honda GL650I
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115 Posts
Today, I was going to reassemble my carburetors, now that the bits are all cleaned and polished. Instead I got sidetracked by pleasant family obligations. Maybe over a couple evenings this week...
 

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1978 Honda CX500, 1983 Honda GL650I
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115 Posts
I took a short ride on my CX500 today after reinstalling its freshly cleaned carbs and replacing the broken choke cable last night. I had the GL650 out briefly yesterday.
More snow coming this week, so they'll lay up again for a while.
 
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