Removing Boyer Bransden rotor

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edward

• Sep 9, 2013

• #1

I am in the process of replacing my Boyer Bransden ignition with a Tri spark but am unable to remove the old Boyer rotor, should this just slide off or do I need some kind of extractor? Any suggestions for removing it without damaging it (in case I want to reinstall)?

 

Towner

• Sep 9, 2013

• #2

Screw in a bolt (I think it is 5/16") and give it some gentle taps to loose the taper.

 

concours

VIP MEMBER

• Sep 9, 2013

• #3

Slide hammer

 

Time Warp

.......back to the 70's.

VIP MEMBER

• Sep 9, 2013

• #4

Towner said:

Screw in a bolt (I think it is 5/16") and give it some gentle taps to loose the taper.

Click to expand...

concours said:

Slide hammer

Click to expand...

My Triumph type pin extractor was to short and couldn't find the slide hammer tool so ended up using one of the bolts from a sprocket puller.
With a large washer under the head of the bolt the 36mm double ended socket for the Ducati's SSSA nut worked a treat as a slide hammer.

 

Beach

VIP MEMBER

• Sep 9, 2013

• #5

Screwing the larger bolt into it will push the rotor off without any hammering....

 

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edward

• Sep 10, 2013

• #6

Is someone able to confirm that the correct extractor bolt to use for the Boyer Bransden is 5/16 BSF. I made the rather stupid mistake of trying to use the bolt supplied with the Tri-spark until I realised too late that this is metric and I have slightly damaged the threads.

 

Towner

• Sep 10, 2013

• #7

edward said:

Is someone able to confirm that the correct extractor bolt to use for the Boyer Bransden is 5/16 BSF. I made the rather stupid mistake of trying to use the bolt supplied with the Tri-spark until I realised too late that this is metric and I have slightly damaged the threads.

Click to expand...

Just checked an old rotor. Thread is hurt a bit as well, but a 5/16" UNF bolt works.

 

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Biscuit

• Sep 10, 2013

• #8

If threads are damaged so no bolt will thread in, take the largest diameter phillips screw driver you've got, enter it into the cam and give a few sideways slaps on the handle with the palm of your hand. It will pop right off. Works on points cam too.

 

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edward

• Sep 10, 2013

• #9

Thanks to all who replied. It was a UNF thread, I found a bolt and worked it in and it just popped off. Now all I have to do is explain to a mate who was making a BSF threaded slide hammer for me why I gave him the wrong info re threads and that I don't need it anyway!