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Impulse 2.0 Remove chainring / spider

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Hi.

I have a 2015 Focus Jarifra with an Impulse 2.0 motor. I have some problems with it slipping / making noises when under load. I understand these motors are problematic from the threads on this forum. Iam quite competent mechanically and would like to disassemble motor and have a look if there is anything obvious Ican fix.

 

I attach a photo of chainring / spider. Taking off the cranks reveals the chainring / spider. Does anyone know how this comes off? First thoughts were the silver notched ring on the BB shaft (28 notches and about 30mm diameter) is a lockring?

 

But then thought is this assembly just pressed on? Could not find any obvious tools that would fit if it were a lockring. So wondered if anyone knew before I start prying etc.

 

Thanks in advance.

IMG_20210908_204207.thumb.jpg.2a8af1ddef628507326d02e6b36c023a.jpg

IMG_20210908_204152.thumb.jpg.3ba6a7067ca6a066c7f012c09cb61f94.jpg

  • Author

ask peter at https://www.performancelinebearings.com/ as also may have the parts you need to get it going again.

 

Hi soundwave

 

Many thanks for that contact.

I emailed Peter and he got back to me with the info.

I think at the very least Iwill get the bearing kit from performancebearings

and if it seems too big a job i will request their full services.

 

Thanks again for your help.

  • 4 years later...

Hi Ciano,

I have the exact same problem. How did you manage to take the spider off?

I would very much appreciate your help.

Hi Ciano,

I have the exact same problem. How did you manage to take the spider off?

I would very much appreciate your help.

Remove the pedal arm, remove the circlip and wiggle the chainring off. If its rusty in there, use a bit of penetrating oil to free it off.

Edited by saneagle

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