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BINOVC
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« on: February 15, 2020, 01:39:30 PM » |
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I'm thinking about replacing the float bowl and slide cover screws with stainless steel socket head screws. The parts fiche lists the diameter and length but not the thread pitch:
Float chamber: 5x16
Slide cover: 4x18
It looks like the M5 screws are available in .5 (fine) and .8 (coarse).
The M4's are either .5 (fine) or .7 (coarse).
Anyone know the pitch?
Thanks!
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« Last Edit: February 15, 2020, 02:09:47 PM by BINOVC »
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Ricky-D
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« Reply #1 on: February 15, 2020, 04:58:01 PM » |
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I understand this won't change your mind, but I'm going to tell you this anyways so you know.
The carburetor float bowl screws are a very special screw that Honda, in their wisdom, makes just for the float bowls.
The screws are made of an especially soft metal composition so that, in a case of over tightening the screw, the screw will strip
and not the threads in the carburetor body which holds the float bowl.
It's a very expensive proposition to replace the carburetor body.
The little screws are cheap when compared.
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2000_Valkyrie_Interstate
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The emperor has no clothes
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« Reply #2 on: February 15, 2020, 06:21:48 PM » |
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I understand this won't change your mind, but I'm going to tell you this anyways so you know.
The carburetor float bowl screws are a very special screw that Honda, in their wisdom, makes just for the float bowls.
The screws are made of an especially soft metal composition so that, in a case of over tightening the screw, the screw will strip
and not the threads in the carburetor body which holds the float bowl.
It's a very expensive proposition to replace the carburetor body.
The little screws are cheap when compared.
 when did steel screws become softer than aluminum carburetors ? |
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steveB (VRCC UK)
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« Reply #3 on: February 17, 2020, 12:43:50 PM » |
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I've used them on carb rebuilds and they give a nice tidy look. Take on board what Ricky-D says and don't brute them up, just snug. Used M4 x 0.7 & M5 x 0.8 suggest you try for size and use copper grease.
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« Last Edit: February 17, 2020, 01:01:30 PM by steveB (VRCC UK) »
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WintrSol
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« Reply #4 on: February 17, 2020, 01:57:03 PM » |
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when did steel screws become softer than aluminum carburetors ? One of the reasons people think Honda's screws are too soft is they use a Phillip's screwdriver, and bugger the heads. I've never damaged one using the proper 'JIS' type screwdriver in them. I'd never heard the screws were softer than aluminum before. |
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98 Honda Valkyrie GL1500CT Tourer
Photo of my FIL Jack, in honor of his WWII service
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98valk
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« Reply #5 on: February 17, 2020, 02:28:47 PM » |
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0.8 thd
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1998 Std/Tourer, 2007 DR200SE, 1981 CB900C 10speed
1973 Duster 340 4-speed rare A/C, 2001 F250 4x4 7.3L, 6sp
"Our Constitution was made only for a Moral and Religious people. It is wholly inadequate to the goverment of any other."
John Adams 10/11/1798
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BINOVC
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« Reply #6 on: February 17, 2020, 08:35:21 PM » |
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Thanks all. Note I read (on McMaster-Carr website) says that if the pitch is not stated, then it is most likely a coarse thread (M5x.8, M4x.7).
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6adan
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« Reply #7 on: February 18, 2020, 11:52:00 AM » |
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For anyone that has striped threads there is a product called a Time-Sert that works great for repairing the carbs.
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1970 CB750JDM, 1975 GL1000, 1979 GL1000 semi cafe, 1979 CBX, 1995 GL1500 SE, 2008 GL1800 trike. Several more not running yet.
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h13man
Member
Posts: 1746
To everything there is an exception.
Indiana NW Central Flatlands
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« Reply #8 on: February 22, 2020, 06:48:55 AM » |
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For anyone that has striped threads there is a product called a Time-Sert that works great for repairing the carbs.
A excellent insert for sure given you have wall thickness to use them thus HeliCoil come into play but not my favorite to use. You can also make a insert out of a set screw using Loctite to keep in place or "staking" it in similar to the Time-Sert method. |
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