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    #1

    Striped float bowl screws

    What size helicoiles do I need for my BS carbs float bowl?
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    #2
    Do you mean the drain screws or the screws holding the float bowl to the carb?
    1983 GS850G, Cosmos Blue.
    2005 KLR685, Aztec Pink - Turd II.3, the ReReReTurdening
    2015 Yamaha FJ-09, Magma Red Power Corrupts...
    Eat more venison.

    Please provide details. The GSR Hive Mind is nearly omniscient, but not yet clairvoyant.

    Celeriter equita, converteque saepe.

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      #3
      Bowl to carb

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        #4
        Do you have a tap set? if so go a size bigger with a new screw.

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          #5
          What size helicoil do I need for my float bowl on bs series carbs? Bowl to carb. Thanks for anyone's help
          Last edited by Guest; 12-15-2015, 10:39 PM. Reason: Mistake

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            #6
            You may not have enough base material left to install the heli-coils. Why not just drill or ream the holes for the next size up screw size??? Would be much easier process.
            1981 GS 1000GLX.
            1981 GS 1000G.
            1981 GS 650GLX.
            1975 TS 185.
            1972 100. Kawasaki.
            1968 100. Suzuki.
            1970 Z 50. Honda.
            1984 CT 70. Honda. (Kids)
            1982 DS 50. Suzuki. (Kids)

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              #7
              Originally posted by habsdoc View Post
              You may not have enough base material left to install the heli-coils. Why not just drill or ream the holes for the next size up screw size??? Would be much easier process.
              This is exactly what I have done. Just carefully drill out using the size indicated on the helicoil tap, use the tap to cut threads in the carburator body, and use the next larger size screw.

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                #8
                Do they actually make Heli-coils that small?


                Life is too short to ride an L.

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                  #9
                  Originally posted by tkent02 View Post
                  Do they actually make Heli-coils that small?
                  yep, i have fitted M3 helicoils before. The size in question is M4.
                  1978 GS1085.

                  Just remember, an opinion without 3.14 is just an onion!

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                    #10
                    Originally posted by Agemax View Post
                    yep, i have fitted M3 helicoils before. The size in question is M4.
                    Sorry, they're M5 on BS carbs, M4 on VM carbs.

                    They do make Helicoils that small, but there's not a lot of metal to work with.


                    There are claims of being able to solder or braze carbs with special rods, but I've never tried it or seen it done.
                    Pot Metal Solder: How to Create Successful Repairs with Super Alloy 1
                    http://muggyweld.com/pot-metal-repair
                    Super Alloy 1 pot metal solder allows anyone to make a repair quickly and easily with any torch. Useful for all pot metal repair projects.
                    Last edited by bwringer; 12-16-2015, 05:52 PM.
                    1983 GS850G, Cosmos Blue.
                    2005 KLR685, Aztec Pink - Turd II.3, the ReReReTurdening
                    2015 Yamaha FJ-09, Magma Red Power Corrupts...
                    Eat more venison.

                    Please provide details. The GSR Hive Mind is nearly omniscient, but not yet clairvoyant.

                    Celeriter equita, converteque saepe.

                    SUPPORT THIS SITE! DONATE TODAY!

                    Co-host of "The Riding Obsession" sport-touring motorcycling podcast at tro.bike!

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                      #11
                      I would tap it to the closest imperial thread (7/32 I think but best do the maths yourself to be sure).
                      79 GS1000S
                      79 GS1000S (another one)
                      80 GSX750
                      80 GS550
                      80 CB650 cafe racer
                      75 PC50 - the one with OHV and pedals...
                      75 TS100 - being ridden (suicidally) by my father

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                        #12
                        Originally posted by hampshirehog View Post
                        I would tap it to the closest imperial thread (7/32 I think but best do the maths yourself to be sure).
                        What thread would 7/32 be?
                        been in engineering maintenance for way to many years but not come across that one be interested to know though.
                        never say never.
                        The big guy up there rides a Suzuki (this I know)
                        1981 gs850gx

                        1999 RF900
                        past bikes. RF900
                        TL1000s
                        Hayabusa
                        gsx 750f x2
                        197cc Francis Barnett
                        various British nails

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                          #13
                          8-32 is common in aviation.
                          1978 Gs1085 compliments of Popy Yosh, Bandit 1200 wheels and front end, VM33 Smoothbores, Yosh exhaust, braced frame, ported polished head
                          1983 Gs1100ESD, rebuild finished! Body paintwork happening winter 2017

                          I would rather trust my bike to a technician that reads the service manual than some backyardigan that THINKS HE KNOWS how to fix things.

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                            #14
                            Well I got the Heilcoils installed in my carbs today. It was pretty easy, should not have any more problems as far as thats concerned. Found the right Heilcoils,(four threads) out of China, took awhile to get here(slow boat) but they were only six bucks and seem to be good quality, 30 coils! I did have to order the installation kit from the UK, it costs $15 and got here two days before the coils did. It came with 20 coils too but I could see they were going to be to long but I have them if I need them. All in all I'm very pleased with the outcome. glad I got this done.

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