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Old 11-06-2008, 05:52 PM   #21
bluroketr6
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Quote:
Originally Posted by maxgs View Post
Guys,
Are there any issues with a big ol' guy like me riding the GSXR liter bike on the Marchesini magnesium wheels? Any chance of bending or breakage at the track?

I have a potential opportunity to pick some up at a really good price. Information appreciated.

-Curt
Not to be rude. But is this a personal hook up or you know somewhere that has some good prices on marchesini wheels. I am looking for some for my r6. Please let me know.
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Old 11-06-2008, 08:54 PM   #22
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On durability issue.........

Marv, Schupak, and some of the other CMRA guys used to have problems with the cush drives chewing up the hubs, especially on the 1Ks. They always replaced Marv's stuff, but the down time is a drag unless you have two sets.
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Old 11-06-2008, 11:41 PM   #23
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Buck, is there a solution for the issue with the cush drive?
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Old 11-07-2008, 10:07 AM   #24
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I know PVM wheels have fix there issue with the crush drive,
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Old 11-07-2008, 10:21 AM   #25
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Max something to think about:

What do the pro's use?

My guess is that if there were significant problems with magnesium (or carbon fiber) there would be something put out there by the mfrs to help them avoid liability. If they say they are ok then likely they are. IMHO
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Old 11-07-2008, 10:23 AM   #26
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Quote:
Originally Posted by bumblebee View Post
Max something to think about:

What do the pro's use?

My guess is that if there were significant problems with magnesium (or carbon fiber) there would be something put out there by the mfrs to help them avoid liability. If they say they are ok then likely they are. IMHO
Most pro's who run these wheels have multiple sets, and often, the "big" guys don't have to pay for them. Additionally, the wheel manufacturers have reps and repair guys at the track for support for issues like the ones mentioned above.

Lastly, if the pro's are getting any type of support from them, they're not going to tell you about any problems with the product perse'.
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Old 11-07-2008, 10:30 AM   #27
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Quote:
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Most pro's who run these wheels have multiple sets, and often, the "big" guys don't have to pay for them. Additionally, the wheel manufacturers have reps and repair guys at the track for support for issues like the ones mentioned above.

Lastly, if the pro's are getting any type of support from them, they're not going to tell you about any problems with the product perse'.
You are right I just meant that if the wheels had an inherent problem like cracking under load, the pro's would maybe use something a little safer.
As far as public use wouldn't the mfr's mention it if they are potentially liable for a wheel coming apart?
I mean, in today's world they even make sure to tell you not to eat the dessicant crystals that come with your new vacuum cleaner.
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Old 11-07-2008, 01:38 PM   #28
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nice use of the word "dessicant"...
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Old 11-07-2008, 01:41 PM   #29
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des·ic·cant
Pronunciation: \ˈde-si-kənt\
Function: noun
Date: 1676
Definition: a drying agent (as calcium chloride)
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Old 11-07-2008, 07:16 PM   #30
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Only fix I've heard of is send 'em back for replacement.
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Old 11-08-2008, 08:01 AM   #31
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Quote:
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Darius is a stunter runs them and his hold up fine... never really see him fall much tho


i was thinking the same.

curt check your pms.
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Old 11-10-2008, 11:15 AM   #32
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All good info. But, I just couldn't justify $3,600.00 on wheels.
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Old 11-10-2008, 08:01 PM   #33
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I had 2 sets of Marchesini Magnesium wheels on my 954RR.
I never had a problem with them and I'm 225lbs before gear.
The cush drive system needs a good inspection after every race.
I kept spare rubber inserts "in stock" and never had the wheel portion need any attention.
I rode the bike for 2 years.
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Old 11-11-2008, 02:20 AM   #34
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Quote:
Originally Posted by maxgs View Post
Buck, is there a solution for the issue with the cush drive?
Get carbon fiber wheels. No cush drive. Lighter and stronger, too.
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Old 11-11-2008, 08:04 AM   #35
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I'd never run carbon fiber wheels, I just wouldn't be able to trust them. Metal bends, carbon fiber shatters.
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Old 11-11-2008, 09:17 AM   #36
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Quote:
Originally Posted by maxgs View Post
I'd never run carbon fiber wheels, I just wouldn't be able to trust them. Metal bends, carbon fiber shatters.
both aluminum and magnesium are brittle as well. Cast aluminum (ala stock wheels) especially.
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Old 11-13-2008, 02:00 AM   #37
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Quote:
Originally Posted by maxgs View Post
I'd never run carbon fiber wheels, I just wouldn't be able to trust them. Metal bends, carbon fiber shatters.
I have heard of bicycle rims doing this, but never a motorcycle rim.

If it is so fragile, why would they use it in Formula one Chassis and Aircraft wings. This is a common misconception about CF wheels. I have seen numerous videos of them performing crush tests on the BST CF wheels and they actually withstand more than the aluminum and magnesium. I wish I could find the other video of them putting an insane amount of weight directly on the lip of a carbon fiber rim and crushing it. The lip bends just like a typical rim would. No cracks or anything. At the motorcycle show, the salespersons stand in the aisle and bounce the rim off the floor all day long.

Here is one test, but no where near as good as the other one I saw. I think it may have been a DYMAG rim for sportbikes.

http://www.youtube.com/watch?v=7wx3ODD11GY
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