Honda 350 Carburetor Insulator
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The other problem is Honda didn't sell a lot of these two-carb 350s . As a result there just aren't that many replacement parts around: OEM or aftermarket. Enter Ebay . . .Or not. Enter a crafty parts-dealer out of Orem Utah, who buys up all the hard to find, but necessary, parts and then jacks the price to to kidnap values. Good work if you can get it. Not too good for your soul however. Not too good for us owners of old hondas.
The do-it-yourself answer is to TIG your old base plate to some aluminum tubing and clamp on some silicone hose. Connect the carbs and off you go for under $50.
In hindsight some DIY things to do and not.
- Use a pro for the TIG welding. I used a friend -- a shade tree mechanic. You can see by the welds, I almost had to take that ransom payoff trip to ebay.
- Cut the tubing with a cut-off disk not a hacksaw. Smearing is a TIG term you will learn otherwise.
- Soak the old base plate in Acetone for a while. Maybe even a trip through the ultrasonic cleaner.
- Soak it again. thirty years of fuel are deposited in that porous aluminum.
Honda parts number: 16211-KF0-010 Carburetor Insulator, Intake Manifold
I bought the silicon hose off Ebay $6 free shipping. It is made for this type of application.
I found the aluminum tube at a local steel vendor in the scrap bin. It is available on ebay as well.