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Discussion Starter #1
So I accidentally stripped the drain plug on my carburetor and then found out after lots of research that they are JIS type screws. I ended up ordering a new drain plug but I have a feeling it's a matter of time before it happens again. Anyone have any ideas on maybe a substitute plug with possibly an allen head?
 

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So I accidentally stripped the drain plug on my carburetor and then found out after lots of research that they are JIS type screws. I ended up ordering a new drain plug but I have a feeling it's a matter of time before it happens again. Anyone have any ideas on maybe a substitute plug with possibly an allen head?


If you stripped something, it is probably the die cast aluminum that the carb is made from and the screw is probably still good. If there is room, I would just re-tap the hole oversize and put a new screw in it.
 

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... Anyone have any ideas on maybe a substitute plug with possibly an allen head?
Assuming you only stripped the head of the screw and not the carb body...



I don't know of any substitute. The end of the drain screw has to have the shape on the end to be able to plug the drain, then be thin enough just behind end to let fuel from the overflow tube to flow around it.... if that makes any sense.



Use the new drain screw and put some anti-seize on it before you screw it in.



jb
 

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If you don't want to buy the JIS drivers, I'd take a grinder to the tip of a normal Phillips driver and blunt it enough that it fits better in the screws all over the bike. You are trying to increase the contact of the shoulder of the driver tip with the screw head and blunting that driver is one way to do it. I'm told Harbor Freight carries a cheap set of JIS drivers. Tom
 

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... I'm told Harbor Freight carries a cheap set of JIS drivers. Tom
Hi Tom,



I looked for the JIS drivers at the local Harbor Freight and could not find them. Couldn't find them on the HF website either.



Ended up purchasing a set from an online hobby shop.



jb
 

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It was interesting that my local bike mechanic did not know what JIS meant or that he had the right tools, but he did when I compared two different drivers laying on his workbench. His response was Oh yeah? Probably folks at HF don't know what they have either. I hope the effort to get the right tools justifies the effort. Good luck. Tom
 

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Discussion Starter #7
So I bought a new drainplug and installed it. After tightening it, it started to strip just a tad bit since I still haven't bought a JIS screwdriver. Rather than spend 20 bucks on a set, I took the screw off again and cut a slot on the head with a dremel grinding wheel for a flat head screwdriver. I installed it with a flat screwdriver and it tightened nicely. Definitely recommend this modification if you can get the original off.
 

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... Definitely recommend this modification if you can get the original off.
It's still a good idea to use some anti-seize.







jb
 
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