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Hinckley Classic Triples 885cc Classic Styled T3's: Legend, Thunderbird, Thunderbird Sport & Adventurer.

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Old 04-26-2008, 08:02 PM   #1 (permalink)
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Engine cover front sprocket gasket and oil seal

Hi,

Whadda ya guys do? Do you change the oil seal for the gear shifter rod as well when you're changing the front sprocket?
Seems I've got a little oil leak coming from that area and figure I might as well put a new oil seal in while I'm at it. Maybe that's standard praxis...but I thought I ask the board anyhooo.

Speedy got knocked over the other day by a blind cager so it needs to go to the shop...Thunderasaki is going to get a well deserved stretch these coming weeks. Look forward to it!

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Spoonero
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Old 04-27-2008, 03:53 AM   #2 (permalink)
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gasket and seal

Hi Spooner.

Yes, according to everything I've read and heard, you are supposed to replace the gasket and the shifter oil seal anytime that sprocket cover comes off.

That said, about three weeks ago I was just finishing a major repair on my bike. I had ordered the gasket and seal from a normally reliable parts supplier, but they had dropped the ball this time, and I still didn't have the parts when it was time to reassemble the bike. I was eager to find out if motor would even start at all after the work I had done, so I straightened out the old, mangled gasket best as I could, and slapped the thing back together--just long enough to get a test ride, mind you.

Oh, I should mention that I have *always* suffered from oil leakage around the shifter rod, despite replacing the seal.

Well, this time around, with the torn and mangled gasket and the seal that those pointy shifter rod splines had traveled through repeatedly--what do you think? Yep. No leakage at all. In fact, for the first time since I purchased the bike almost three years ago, it is 100% leak-free.

I hardly know what to make of this. On one hand, it's a major pain in the butt to take that front sprocket cover off, and I certainly wouldn't want to have to do it twice because I'd been too lazy or too cheap to replace the gasket and seal. On the other hand, at least in this one instance, a new gasket and seal were quite unnecessary.

Go figger.

Sorry to hear about Speedy. You do have your share of cager-related mishaps, don't you? Glad you weren't hurt.
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Old 04-27-2008, 06:35 AM   #3 (permalink)
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Good idea to replace the lock washer on the coutershaft sprocket nut too.
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Old 04-27-2008, 11:41 AM   #4 (permalink)
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Originally Posted by DaleE View Post
On one hand, it's a major pain in the butt to take that front sprocket cover off,
I have to change my sprocket set very soon, and I was just wondering why you say this cover is difficult to remove. Can you tell what makes this task so difficult, or what pieces have to come off before the cover can be accessed (shift lever....more?)
I have an electric impact wrench for the CS nut, so hopefully that will not be a problem.
Thank You!
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Old 04-27-2008, 12:43 PM   #5 (permalink)
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Tape over the splines when you remove or install the cover and that will save your seal from cuts. A little oil or grease helps too.

I've done chains on a couple of these bikes so far and if everything is in good shape to start with there aren't any problems.

Jim
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Old 04-27-2008, 04:12 PM   #6 (permalink)
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Quote:
Originally Posted by DaleE View Post
Sorry to hear about Speedy. You do have your share of cager-related mishaps, don't you? Glad you weren't hurt.
Good for you!

I've had no leaks on my bike except this once...and that's after letting somebody else working on the bike. Lesson learned

You know what...I don't get it either. ***!! This is the third time or something...rear-ended twice on Thunder and then Speedy gets knocked over when parked...talk about bad juju. The best thing (NOT!) is that my helmet was hanging from the mirror so it's gotta go too since it got smashed under the bike. Hell, I went to the dealer this weekend to try out new helmets and I realized I've got an Arai RX-7 head!!...beautiful...that's gonna rip a big hole in my pocket cuz I'm pretty sure the insurance company will insist that I'm still a Shoei head and a three year old one at that....so I'll prolly have to put the difference in myself.
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Old 04-27-2008, 04:48 PM   #7 (permalink)
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okay, a relative pain in the butt

Quote:
Originally Posted by gregp View Post
I have to change my sprocket set very soon, and I was just wondering why you say this cover is difficult to remove. Can you tell what makes this task so difficult, or what pieces have to come off before the cover can be accessed (shift lever....more?)
I have an electric impact wrench for the CS nut, so hopefully that will not be a problem.
Thank You!
Greg,

For anybody who knows what he's doing, this would probably be considered a simple task. Problem is, I rarely fall into that category.

The first time I did it, I had all kinds of difficulty getting the cover past the clutch push rod. I kept thinking, a little farther, just a little farther, without realizing that the push rod will follow the cover out for about a foot or so, if you don't hold it back. That's the trick I learned then, just hold the push rod back as you pull the cover off, and the rest is all straightforward enough.

The shift lever of course has to come off, and the footpeg, and I also had the sidestand off, though I don't think that was required. And you know that you'll lose a bit of oil, right? That locking flange on the sprocket nut was not cheap, if memory serves, and I went ahead and re-used the same one, though I wouldn't want to do that repeatedly.

Having someone around to hold the bike in place when you torque the sprocket nut is also a very good thing.
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Old 04-27-2008, 04:56 PM   #8 (permalink)
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I replaced all three seals.

Clutch push-rod seal
Shifter shaft seal
Countershaft seal

Those are not very expensive, and I figure replacing them while it is all apart is just good preventive maintenance.

The countershaft seal was noticeably worn on both my bikes.
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Old 04-28-2008, 11:54 AM   #9 (permalink)
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Quote:
Originally Posted by denny View Post
I replaced all three seals.

Clutch push-rod seal
Shifter shaft seal
Countershaft seal

Those are not very expensive, and I figure replacing them while it is all apart is just good preventive maintenance.

The countershaft seal was noticeably worn on both my bikes.

Good call, denny! I thought the exact same thing the last time I replaced the spockets. They are pretty easy to replace as long as the cover is off anyway. +1

Noel
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