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Author Topic: 550 replacement disc rotor  (Read 358 times)

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Offline GlynMo

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550 replacement disc rotor
« on: October 06, 2018, 08:26:50 am »
Hi, sorry if this has been answered before but I couldn't find anything via 'search'. Is there a UK (or European) source for improved disc rotors for the 550K? I've found drilled rotors in the States but the shipping cost is prohibitive.

Offline 540nova

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Re: 550 replacement disc rotor
« Reply #1 on: October 06, 2018, 10:08:56 am »
Drill your own.

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Offline DaveBarbier

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550 replacement disc rotor
« Reply #2 on: October 07, 2018, 05:24:16 am »
You can drill your own but get a few drill bits (or learn to sharpen a drill bit well) and use a dark sulfurized cutting oil. In the states we have Home Depot which carries Oatey oil for thread cutting. Works well enough.

You can find a hole pattern you like and print it out and tape it to your rotor then have a blast drilling it. Stainless is very tough though.

Offline GlynMo

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Re: 550 replacement disc rotor
« Reply #3 on: October 07, 2018, 05:57:21 am »
Yeh, I'd drill the rotor myself - if I had a pedestal drill. I suppose I could pay to get it done by an engineering shop, and it'd cost less than the shipping cost of a replacement from the US.

Offline flybox1

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Re: 550 replacement disc rotor
« Reply #4 on: October 08, 2018, 06:54:59 am »
Contact member Godffery.  He thins them to 4mm and then cross drills. them.  Sweet products (put 2 on my 750)
None of the links to his site seem to work, so reach out to him thru PM.

4into1.com also has them.
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Offline RAF122S

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Re: 550 replacement disc rotor
« Reply #5 on: October 08, 2018, 09:09:03 pm »
The stainless steel is best drilled using a cobalt drill. If you are going to want them ground thinner you could ask Godfrey to just  ship you the bolts and  thinned discs without the carriers and drill the studs on your carriers and then loctite thread locker e the replacement fasteners onto your  rotor carrier centers. Would save you a few dollars in shipping. They have to be Blanchard ground to thinner than stock minimum thickness when lightening them for twin disc setup. Trudisc in the upper Midwest USA will not grind any below minimum spec for liability purposes. It would pay you to fill in or remove that value on your discs if going thinned and lightened so you do not run into any trouble if someone measures your rotor thickness after an accident. Epoxy and sanding it back level does a nice job for that purpose...
David stuck in the curvy back roads of "Upper East" TN

Offline GlynMo

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Re: 550 replacement disc rotor
« Reply #6 on: November 15, 2018, 02:48:17 am »
Update - I had the rotor drilled by Wingovations in Scotland. Tidy job and a fair price.

Offline robvangulik

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Re: 550 replacement disc rotor
« Reply #7 on: November 15, 2018, 04:16:42 am »
I bet you could have bought a vertical drill stand for that 'fair price' ;D

Offline beemerbum

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Re: 550 replacement disc rotor
« Reply #8 on: November 15, 2018, 10:34:24 am »
Hi, sorry if this has been answered before but I couldn't find anything via 'search'. Is there a UK (or European) source for improved disc rotors for the 550K? I've found drilled rotors in the States but the shipping cost is prohibitive.
I have used this outfit for Honda as well as Yamaha rotors. They not only drill them but flat grind them as well. The braking performance on my Hondas was improved 100%. The cost is very reasonable and the turn-around is quick.https://truedisk.net

Offline robvangulik

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Re: 550 replacement disc rotor
« Reply #9 on: November 15, 2018, 04:10:25 pm »
Hi, sorry if this has been answered before but I couldn't find anything via 'search'. Is there a UK (or European) source for improved disc rotors for the 550K? I've found drilled rotors in the States but the shipping cost is prohibitive.
I have used this outfit for Honda as well as Yamaha rotors. They not only drill them but flat grind them as well. The braking performance on my Hondas was improved 100%. The cost is very reasonable and the turn-around is quick.https://truedisk.net
Michigan UK?

Offline GlynMo

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Re: 550 replacement disc rotor
« Reply #10 on: November 16, 2018, 04:33:16 am »
I bet you could have bought a vertical drill stand for that 'fair price' ;D

Very true, but you haven't seen the tiny shed I'm working in, not a lot of space for more kit. Plus, judging by the comments on how hard the rotors are, I'd have needed a more powerful drill too.

Offline dave500

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Re: 550 replacement disc rotor
« Reply #11 on: November 16, 2018, 05:35:16 am »
not powerfull but decent proper bit.

Offline MauiK3

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Re: 550 replacement disc rotor
« Reply #12 on: November 16, 2018, 08:05:56 am »
Stainless is notorious for being hard to drill. I had mine done at /truedisk.net, great folks, impeccable work. They ground them and drilled them. I didn't want to tackle keeping the pattern perfect, a dividing head works for that and I don't have one. Mine are working great.
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