EVO All Evo Model Discussion

Pinion Gear Stuck

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Old Aug 19, 2023 | 06:03 PM
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Default Pinion Gear Stuck

I’m baffled and need help. I’m disassembling a lower end to sell practically new parts; oil pump and flywheel set.

Pinion gear nut came off no sweat but the pinion gear won’t slide off! I’m worried the key has jammed itself somehow.

Anyone have a solution? The new flywheel set was installed by very reputable machine shop (S&S crankcase) just a year ago.
 
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Old Aug 19, 2023 | 06:39 PM
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This tool will help as I've bought and used it. You could probably use an auto puller but I was afraid of damaging/breaking the gears. Also, sounds as if you have a solid bottom end, why the breakdown and sell off?

​​​​​​https://www.fasteddyco.com/product-p...on-gear-puller

Ride safe!
 
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Old Aug 19, 2023 | 06:40 PM
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Isn't the pinion gear on a tapered shaft and you need a puller?
 
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Old Aug 19, 2023 | 06:58 PM
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Originally Posted by Max Headflow
Isn't the pinion gear on a tapered shaft and you need a puller?
yes, S&S has a tapered shaft, but there’s also a key

Pics are of me disassembling gearbox before I bought new flywheel assembly. Can clearly see the woodruff key for pinion gear.


 
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Old Aug 19, 2023 | 07:13 PM
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Originally Posted by nutsandbolts5212
This tool will help as I've bought and used it. You could probably use an auto puller but I was afraid of damaging/breaking the gears. Also, sounds as if you have a solid bottom end, why the breakdown and sell off?

​​​​​​https://www.fasteddyco.com/product-p...on-gear-puller

Ride safe!
Thanks for that. I’m a fan of Low Brow.

The sell off is because I was a dumbshit rookie when I built up this V96. Beautiful top end job, new flywheels and oil pump. The motor had 90,000 miles. The ONE thing I missed, and I’ve got to say two mechanic friends of mine also missed, who I had look at the threads, was two repaired cylinder stud taps in the crankcase.

Fat stupid and happy, everything torqued nicely and the build was complete. Bike ran fantastic, then at 500 miles, right after its first oil change, it blew the rear head gasket. When I pulled the cylinder, you could see both studs had lifted a few thousand. Still could have salvaged the thing if I would have taken crank to a shop and have timeserts PROFESSIONALLY installed. Not to be. I found a tool that supposedly aligned your hand drill and I proceeded to do two timeserts by hand. Damned if the studs were cockeyed!

if I was still working I would grab a new crankcase and build a damn near new S&S 96 EVO, but my wife said that it may be time to move on and stop trying to kick that dead horse. In the meantime I promised to be real nice to her and she let me buy a brand new S&S 111. 3500 miles on it and what a sweet motor!

long story but thanks for asking. What do you charge for therapy?
 
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Old Aug 19, 2023 | 07:40 PM
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The tool makes it easy, you can poorboy it with a small 2 jaw puller most times if you don't want to buy one. Get a little pressure and tap the end with a hammer a few times they usually pop off. If not a little heat with under pressure will.
 
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Old Aug 19, 2023 | 08:29 PM
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Originally Posted by Captscotty
Thanks for that. I’m a fan of Low Brow.

The sell off is because I was a dumbshit rookie when I built up this V96. Beautiful top end job, new flywheels and oil pump. The motor had 90,000 miles. The ONE thing I missed, and I’ve got to say two mechanic friends of mine also missed, who I had look at the threads, was two repaired cylinder stud taps in the crankcase.

Fat stupid and happy, everything torqued nicely and the build was complete. Bike ran fantastic, then at 500 miles, right after its first oil change, it blew the rear head gasket. When I pulled the cylinder, you could see both studs had lifted a few thousand. Still could have salvaged the thing if I would have taken crank to a shop and have timeserts PROFESSIONALLY installed. Not to be. I found a tool that supposedly aligned your hand drill and I proceeded to do two timeserts by hand. Damned if the studs were cockeyed!

if I was still working I would grab a new crankcase and build a damn near new S&S 96 EVO, but my wife said that it may be time to move on and stop trying to kick that dead horse. In the meantime I promised to be real nice to her and she let me buy a brand new S&S 111. 3500 miles on it and what a sweet motor!

long story but thanks for asking. What do you charge for therapy?
No charge for the therapy, I enjoyed the backstory. I also like Low Brow. Thats who turned me on to the Fast Eddy tools.

Ride safe!
 
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Old Aug 19, 2023 | 09:33 PM
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Originally Posted by nutsandbolts5212
No charge for the therapy, I enjoyed the backstory. I also like Low Brow. Thats who turned me on to the Fast Eddy tools.

Ride safe!
Next few years plan will be sell the Triumph and rebuild an EVO Sportster for bopping around town. Yeah, Low Brow has a sweet thing going.

Be good
 
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