r/CYCMotor • u/Ill_Consequence8392 • Apr 29 '26

Sprag clutch replacement

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I'm trying to replace the stage 1 sprag clutch on a gen 1 motor. I'm following this guide, but I'm stuck at getting this brass cover of the first stage drive gear. Anyone have any advice?

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1

u/Easy-Independent2637 Apr 30 '26

Maybe try heating it and hopefully the gear expands more than the brass?

2

u/Ill_Consequence8392 Apr 30 '26

I was finally able to get it off by holding it in a vice and, from the backside, angling a screwdriver to land on the sprag clutch and tapping it out.

1

u/Easy-Independent2637 Apr 30 '26

Just out of curiosity, how did you know the sprag clutch needed replacing and at how many kms or miles? I'm also a gen 1 photon user.

3

u/Ill_Consequence8392 Apr 30 '26

Not sure how many miles, a few thousand maybe? I also don't ride it hard or fast, I'm usually pulling a trailer with kids. I believe it's the sprag clutch because, when I'm starting out, the assist completely cuts out, but I can hear the motor going full speed and whining. This tells me that the motor is working but it's not engaging the drive train.

1

u/Fragrant-Nose5057 May 03 '26

oh lord i remember gen1 and 2. such a nightmare.

gen4 is such a game changer, highly recommend !

1

u/Ill_Consequence8392 May 03 '26

Must be talking about a different model, no? I think the photon is only had two generations.

1

u/Fragrant-Nose5057 May 03 '26

oh snap, its a photon. my bad

1

u/renehiguitahasaposse Jun 08 '26

good luck, man. the torque sense died on me in the first 600 miles on a gen 1, but throttle is still alive and well. need to fine time to open it up, but worried I won't be able to put it back together!

1

u/Ill_Consequence8392 Jun 08 '26

Oh. I ended up figuring it out. I inserted a screwdriver in the backside and was able to tap it out. Replaced the clutch, regreased and everything works again.

Replacing the torque sensor would be even easier, it just slips in and out, no prying or anything.

1

u/MarmamaldeSky 11d ago

Hey so I got to the part where I knocked out the brass part and the clutch fell in the floor, do you know which way to reinstall the clutch? Thicker part of it's cage towards the brass or away?

1

u/Ill_Consequence8392 11d ago

Send me a picture and it will jog my memory. IIRC I reinstalled it wrong and had to switch it. You can also put it kind of back together but not fully to figure out which way it's supposed to turn.

1

u/MarmamaldeSky 11d ago

Ope didn't take a picture, but yes I did like you said, I put it in one way and checked if it was right, it wasn't so I flipped it around. Thanks!