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Re: Small Fuel Leak from Carb - JIS Screws

 

Some JIS screws can be identified by a small dimple on the screw head. You run into the biggest problems when trying to unscrew those which haven't been unscrewed for years or there's Loctite on them.
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That's why many have replaced the carb float bowl screws with Allen head screws. They're also easier to remove with a ratchet hex drive in those difficult to access ones buried in the innards of the carbs.
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I've installed an inline filter on my W650 to keep crud out of the carbs, but that doesn't help with fuel that sits in the bowl for months. I do however, only fill up my tank at a Chevron station. They add Techron to their gas, which should help keep crud from forming. I also live in a climate with a short winter where they don't salt the roads so the bike doesn't sit as long as it did when I lived in the northeast.
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Comparison of the different screwdriver tips. Like Phillips screws they come in #1, #2, #3, etc sizes.
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It's easy to round out the JIS screws because the screwdriver is hitting only the upper part of the notches with the most torque.?
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As best I can tell, none of the screwdrivers sold at Hazard Fraught Tools include a JIS bit.?
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Some say that Posidrive screwdrivers could be used on JIS screws but I have not tried it. I have ground down the tip of Phillips screwdrivers and that seems like it works. But when in doubt, use the bike tool kit screwdriver.
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Re: Small Fuel Leak from Carb

 

Yep - many of us learned it the hard way LOL.


On Sat, May 31, 2025 at 6:58?AM Tom Marckese via <tmarckesejr=[email protected]> wrote:
Did not know this...Riding since 1969...

On Fri, May 30, 2025, 12:10?PM Tom Herling via <thomasjherling=[email protected]> wrote:
Those screws are not Phillips screws, they are JIS (Japanese Industry Standard) screws. You should use the screwdriver that's in the tool kit if you don't have a JIS screwdriver.?
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I only learned about this after fouling up all the screws on my bike.?
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I think you can also grind down the tip of a Phillips screwdriver, but I can't swear by that.
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More info here:
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Re: Small Fuel Leak from Carb

 

Did not know this...Riding since 1969...


On Fri, May 30, 2025, 12:10?PM Tom Herling via <thomasjherling=[email protected]> wrote:
Those screws are not Phillips screws, they are JIS (Japanese Industry Standard) screws. You should use the screwdriver that's in the tool kit if you don't have a JIS screwdriver.?
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I only learned about this after fouling up all the screws on my bike.?
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I think you can also grind down the tip of a Phillips screwdriver, but I can't swear by that.
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More info here:
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Re: Small Fuel Leak from Carb

 

Those screws are not Phillips screws, they are JIS (Japanese Industry Standard) screws. You should use the screwdriver that's in the tool kit if you don't have a JIS screwdriver.?
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I only learned about this after fouling up all the screws on my bike.?
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I think you can also grind down the tip of a Phillips screwdriver, but I can't swear by that.
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More info here:
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https://revlimiter.net/blog/2014/09/the-japanese-phillips-jis-screwdrivers/
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Re: Small Fuel Leak from Carb

 

Those screws are 4MM by 8MM long.? NOT the same as your float bowl screws....
Re: Small Fuel Leak from Carb

 

I just went out to inspect to see if it was still leaking and there was some (about 1/2 oz) of the Techron in a plastic container that I placed beneath the left carb float bowl.
I could also see a drip located on the bottom of the accelerator pump.
Everything above that seems to be dry so I think that's probably where the leak is.
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I attempted to tighten the 3 screws that attach the accelerator pump cover to the bottom of the float bowl but I think I buggered them up a but since I just used a standard Phillips screw driver.
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Does anyone know if these are the same screws as the four screws that hold the float bowl on?
I replaced mine with hex when I first got the bike so if they're the same, then I just need to locate my receipt to get the size UNLES someone can let me know what size they are.
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Then I'll remove the left side float bowl and remove the accelerator pump from the bench, which may be easier to remove and replace the o-ring and gaskets inside the pump.
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Any thoughts/comments are much appreciated.
Re: Small Fuel Leak from Carb

 

I just added some Chevron Techron through the fuel line (disconnected from petcock) after draining the fuel from both drains at bottom of float bowls.
I'm going to let it sit until tomorrow morning and then I'll drain the Techron and reconnect fuel line and start her up and see what happens.
Re: Small Fuel Leak from Carb

 

Do NOT use regular carb cleaner.? What is needed is something like Chevron Techron, BG 44K, etc.? Regular "carb cleaner"? will attack the rubber bits in the carb and cause them to swell and starting disintegrating exacerbating the issue....
Re: Small Fuel Leak from Carb

 

Before removing carbs which is no fun I would fill the carb up with carburetor cleaner and let it set overnight
Re: Small Fuel Leak from Carb

 

Cracked fuel line? Sometimes they experience microcracks you can barely see.?


On Wed, May 28, 2025 at 9:52?AM Keith Grams via <grams=[email protected]> wrote:
I had the bike sitting for about 2 years after the petcock developed a leak. I emptied all the gas from the tank before I let it sit so no gas in tank.
I'm passing the bike on to my son and we purchased all the seals, etc. and rebuilt the petcock which no longer leaks.
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Added new gas and the bike started right up. It sounded a little grumpy at first but the engine seems to be running pretty smoothly after everything got warmed up.
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Then my son noticed a slight dripping of gas on the bottom of the left float bowl.
Upon closer inspection, we noticed slightly wet area between the two carbs seemingly closer to the left carb above the float bowl and even higher than the metal choke rail.?
I just can't see exactly where the source of the leak is yet.
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Before I remove the carbs, is there any common area of failure (gas leaks) in that general vicinity that I can possible get to without removing the carbs?
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Any suggestions are much appreciated.
Small Fuel Leak from Carb

 

I had the bike sitting for about 2 years after the petcock developed a leak. I emptied all the gas from the tank before I let it sit so no gas in tank.
I'm passing the bike on to my son and we purchased all the seals, etc. and rebuilt the petcock which no longer leaks.
?
Added new gas and the bike started right up. It sounded a little grumpy at first but the engine seems to be running pretty smoothly after everything got warmed up.
?
Then my son noticed a slight dripping of gas on the bottom of the left float bowl.
Upon closer inspection, we noticed slightly wet area between the two carbs seemingly closer to the left carb above the float bowl and even higher than the metal choke rail.?
I just can't see exactly where the source of the leak is yet.
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Before I remove the carbs, is there any common area of failure (gas leaks) in that general vicinity that I can possible get to without removing the carbs?
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Any suggestions are much appreciated.
Re: Captain Jake's website

 

I was able to access the instructions using that archived link. It didn't work from my iPad but once I got home to my computer, it works fine.
Thank you Matt and everyone else for your help.
Re: Captain Jake's website

 

Yes he's still with us. He's a co-owner of this group.?
Try a search on our online site messages for Captain Jake.



On Sunday, May 18, 2025 at 02:23:20 PM PDT, Paul via groups.io <baillieandsons@...> wrote:


Tbe address I listed For him is no good anymore I got a failure notice His name his name is David Sposato And he lives in Louisville Texas, 75057, I haven't seen any posts from him in a while, Time flies!,I'? ? had my 2000W for 25 years!!!
Alohapaul


On Sun, May 18, 2025 at 5:56 AM, Tom Herling via groups.io
<thomasjherling@...> wrote:
Is he no longer with us?
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I'd say allowing the site to go dark and letting it be availableon Internet Archive is a sign that he wouldn't mind having the information posted where others could more easily find it, especially fellow W650 riders.
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It's not like he monetizes it so it wouldn't result in potential economic harm (an important factor in copyright infringement cases).
Re: Captain Jake's website

 

Tbe address I listed For him is no good anymore I got a failure notice His name his name is David Sposato And he lives in Louisville Texas, 75057, I haven't seen any posts from him in a while, Time flies!,I'? ? had my 2000W for 25 years!!!
Alohapaul


On Sun, May 18, 2025 at 5:56 AM, Tom Herling via groups.io
<thomasjherling@...> wrote:
Is he no longer with us?
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I'd say allowing the site to go dark and letting it be availableon Internet Archive is a sign that he wouldn't mind having the information posted where others could more easily find it, especially fellow W650 riders.
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It's not like he monetizes it so it wouldn't result in potential economic harm (an important factor in copyright infringement cases).
Re: Captain Jake's website

 

Is he no longer with us?
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I'd say allowing the site to go dark and letting it be availableon Internet Archive is a sign that he wouldn't mind having the information posted where others could more easily find it, especially fellow W650 riders.
?
It's not like he monetizes it so it wouldn't result in potential economic harm (an important factor in copyright infringement cases).
Re: Captain Jake's website

 

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I have Captain Jake’s shimming page and his airbox mod page saved as PDF files… just for me to read and maybe use for myself someday. ?I could post them in the files section… but not without his permission…


On May 17, 2025, at 11:57?AM, Tom Herling via groups.io <thomasjherling@...> wrote:

Perhaps someone with a better understanding than of how web pages work could add that content to the Files section of this group??
Re: Captain Jake's website

 

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It did, hence the ?“Wayback Machine” internet archive pages.

The advrider thread is amazing… but a lot to sort through…


On May 17, 2025, at 10:24?AM, Don Pat via groups.io <leamingpd@...> wrote:

Won’t load on my old iPad. I thought Jakes site went away a few years ago. This one is pretty interesting.
Don in Niagara



Re: Captain Jake's website

 

Perhaps someone with a better understanding than of how web pages work could add that content to the Files section of this group??

Re: Captain Jake's website

 

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??

Re: Captain Jake's website

 

开云体育

Won’t load on my old iPad. I thought Jakes site went away a few years ago. This one is pretty interesting.
Don in Niagara


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