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Author Topic: 1968 Suzuki T500 Cobra  (Read 21784 times)

Offline Sonreir

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Re: 1968 Suzuki T500 Cobra
« Reply #150 on: May 17, 2019, 12:10:38 »
Getting some more work in on this bad boy.

Front hub is cleaned up. Probably tackle the rear this weekend.
Sparck Moto - http://www.sparckmoto.com

Audaces fortuna iuvat.

1977 Honda CJ360 - Café SOS - Stage One™, Café SOS - Stage Two™
1976 Puch Maxi - APuchalypse Now
Suzi T500 Cobra Resto

Custom Gauge Graphics
Custom Wiring Harnesses

DTT Red, White, and/or Black 360 Club - Better than those Blue guys

Offline teazer

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Re: 1968 Suzuki T500 Cobra
« Reply #151 on: May 17, 2019, 13:19:30 »
Looks good.  Did you check it for cracks?

Offline pacomotorstuff

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Re: 1968 Suzuki T500 Cobra
« Reply #152 on: May 17, 2019, 17:34:35 »
Hi Matt,
What Teazer is talking about is a propensity for the Cobra front brake drum casting to crack.  Usually a good visual inspection will reveal any cracks, but a dye penetrant test might be a good idea if you see any suspicious areas.
Don't confuse "chill cracks" with an actual crack in the casting - little wrinkles in the diecast hub that don't affect anything
The five hundred's hub is a little on the light side as far as mass and this may contribute to the cracking that's been seen in these hubs, when they've been used hard.
Also what has been noticed with these hubs is an out of round condition on the drum and / or the shoes only contacting the drum for just part of the shoes' area (only 30% reported in one case), which results in overheating the hub, contributing to the cracks.
The smart guys that run these things get the drum trued up in a lathe and the shoes relined and arced to match the drum diameter.
Haven't done any Cobra stuff yet but did a couple of Honda and Yamaha drums over the winter and OMG how out of round they were.
If you can't find anyone in your area that does this stuff, PM me and I"ll give you a contact in the Toronto area whose work I am satisfied with.
The ultimate would be to get the wheel all laced up and then have the drum turned for true, but a lot of money and I don't know anyone who does it anymore, so I do the best I can.
Pat


Offline Sonreir

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Re: 1968 Suzuki T500 Cobra
« Reply #153 on: May 17, 2019, 18:29:20 »
I don't see anything out of the ordinary. The braking surface looks smooth and solid all the way around and I don't see any issues with the aluminum.
Sparck Moto - http://www.sparckmoto.com

Audaces fortuna iuvat.

1977 Honda CJ360 - Café SOS - Stage One™, Café SOS - Stage Two™
1976 Puch Maxi - APuchalypse Now
Suzi T500 Cobra Resto

Custom Gauge Graphics
Custom Wiring Harnesses

DTT Red, White, and/or Black 360 Club - Better than those Blue guys