03-06-2022, 04:41 PM | #1 |
Join Date: Jan 2018
Location: NC
Posts: 229
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Hawk shifter seal installation
I have a question about the best way to go about properly installing a Hawk 250 shifter seal. I watched several online videos, replaced the seal, and it leaked. I spoke with a friend of mine who is a motorcycle mechanic, and he said to use a thin coating of black RTV around the outer diameter of the seal before installing. He also noted to thoroughly clean out the shifter seal cavity with brake parts cleaner and make sure it was a clean, dry surface. I did all of that and it is still leaking around the outer diameter at the bottom of the seal, which indicates to me that I didn’t properly install it.
I’m open to any advice from those with experience successfully replacing these seals as to the best process you’ve found so that they don’t leak. Thanks |
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03-06-2022, 05:32 PM | #2 | |
Join Date: Oct 2021
Location: odessa MO; donna TX
Posts: 152
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Quote:
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03-06-2022, 06:52 PM | #3 |
Join Date: Jan 2018
Location: NC
Posts: 229
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1. Yes, case is slightly marred from the seal being removed where the screw I used to take the seal out nicked the case. The nick is more toward the outer edge of the case, but it still could create a valley for leakage.
2. I drained the bike completely of oil, then after removing the seal, did the clean up/drying job in order to have a dry mating surface. I did *not* tilt the bike to the right overnight after reinstalling the seal with the RTV sealant. I did allow it to dry/set up for 24 hours before re-adding fresh oil. |
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03-06-2022, 07:27 PM | #4 | |
Join Date: Sep 2021
Location: De Soto, MO
Posts: 1,942
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Quote:
If it is too hard to get your finger in there, you could use a pipe cleaner, Q-tip, etc.
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03-06-2022, 10:52 PM | #5 |
Join Date: Oct 2020
Location: Flower Mound Texas
Posts: 904
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Try cleaning up the burrs and get the area clean and dry of oil. Then apply a little Permatex "The Right Stuff" (black) around the outside of the seal then install the seal. Let it dry a few minutes and go have fun. That stuff is impervious to oil and thick enough to seal up imperfections.
Also check your vent hose for blockage, as that can cause the crankcase to build enough pressure to make oil leak from the seals.
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2021 Tao Tbr7 - "Lucille" Mods so far- Brozz swingarm, 21" front rim (Bridgestone Tw302 rear/Dunlop D606 front tires), Digital gauge cluster, pz30b pumper carb, after market hand guards, aftermarket brake and clutch levers, round fold away mirrors, Fly handlebars shortened slightly, 13t front sprocket 2009 Q-link Legacy 250 1982 Suzuki GS1100ES - "Jolene" |
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03-07-2022, 09:12 AM | #6 |
Join Date: Jan 2018
Location: NC
Posts: 229
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Thank you. Good idea on the vent hose. I did not think of that. I did use Permatex on the seal originally, but I will definitely check the vent hose.
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03-07-2022, 09:14 AM | #7 |
Join Date: Jan 2018
Location: NC
Posts: 229
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Thank you. The little nick in the case could literally be filled in with a little dab of JB Weld on it on the end of a toothpick. That is how small the nick is. I didn't think it would leak with that nick being so small, being at the outer edge of the case, and with also using RTV sealant. Obviously, I was wrong and any imperfections in the sealing surface can lead to this.
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