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 Post subject: Yikes~!!
PostPosted: Mon Sep 18, 2017 12:11 pm 
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On the street

Joined: Sat Aug 26, 2017 6:09 am
Posts: 35
Country: Canada
Bikes owned: h1,gs550,rz350/sv650/kh400
I finally got my 500 cases apart.I pulled the crank and realized the bearings on both ends are shot. So I started looking at replacements. I just about fainted. They are insanely expensive. Are these the only available options for this?? If thats the case I will likely have to stick with the 550 and sell off the 500. The cost of those bearings plus the price of install would go a very long way toward other items needed.I am in canada so I would have to tack on nearly 40% more to the price due to the rate of exchange and the insane shipping costs.


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 Post subject: Re: Yikes~!!
PostPosted: Tue Sep 19, 2017 6:26 am 
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Joined: Sat Jun 28, 2014 1:22 am
Posts: 225
Country: United Kingdom
Bikes owned: T500_MKIII
What option are you looking at? They are no longer available OEM so the NoS that come up occasionally fetch a premium. There are Japanese repro's (Cruzin Image) which aren't cheap, but probably less than you'd fined NoS.


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 Post subject: Re: Yikes~!!
PostPosted: Tue Sep 19, 2017 7:10 am 
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Joined: Sat Aug 26, 2017 6:09 am
Posts: 35
Country: Canada
Bikes owned: h1,gs550,rz350/sv650/kh400
Ya it was the cruzinimage ones I saw.And they dont even ship to canada for some reason. The NOS stuff is just nuts. I didnt know if anyone had maybe found a cheaper way to do them, like use an off the shelf bearing pressed into a sleeve or something.


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 Post subject: Re: Yikes~!!
PostPosted: Tue Sep 19, 2017 7:35 am 
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To the on ramp

Joined: Sat Jun 28, 2014 1:22 am
Posts: 225
Country: United Kingdom
Bikes owned: T500_MKIII
Yes it been done putting a 6305 bearing into the machined out old bearing or new bush. They available from dino GT but more expensive the the repro's. You might be able to get something done locally cheaper, but time is money setting up to do a couple of bearings is likely to put you in the same place cost wise.

http://www.dinogt.fr/vente-de-pieces/suzuki/refabrications/roulements-exterieur-et-interieur-de-vilebrequin


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 Post subject: Re: Yikes~!!
PostPosted: Tue Sep 19, 2017 12:10 pm 
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On the street

Joined: Sat Aug 26, 2017 6:09 am
Posts: 35
Country: Canada
Bikes owned: h1,gs550,rz350/sv650/kh400
Yes I can see there is not likely a cheaper way. Would a bushing need to be made from hardened steel? I know it must be very accurate but if a complete bearing of a slightly smaller size were used then would'nt a strong steal bushing do.Its only sitting in an aluminum case after all. In that case a bushing could be made to accept a bearing and seal from say a gt550 which seam to be much less expensive. A small shop or a machinist that does work on the side might be able to do it for a reasonable price.


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 Post subject: Re: Yikes~!!
PostPosted: Mon Apr 01, 2019 11:09 am 
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Joined: Mon Apr 06, 2015 6:17 pm
Posts: 66
Location: ottawa, ontario, canada
Country: Canada
Bikes owned: 1975 T500, 1983 SP250
curious, what you decided on in the end? can we get an update?


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 Post subject: Re: Yikes~!!
PostPosted: Sat May 11, 2019 2:35 pm 
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Joined: Sat Aug 26, 2017 6:09 am
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Country: Canada
Bikes owned: h1,gs550,rz350/sv650/kh400
I had to put it on hold for various reasons so nothing has been resolved at this point. I am Just now getting back at it. First I need to get my crank bearings off and remove the seals so I can get a good look at how these things are made, then go from there. I dont know if perhaps a standard bearing of suitable size could be disassembled and the parts put into the housings from the original crank bearings or if machining is the way to go.The only way I could see machining being cost effective is if I was able to find someone who has the ability to do it at home. If I have to pay a shop its not likely gonna save any money.


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 Post subject: Re: Yikes~!!
PostPosted: Sat May 11, 2019 11:58 pm 
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World Superbike
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Joined: Thu Feb 16, 2012 11:50 am
Posts: 2209
Location: The Republic of South Yorkshire
Country: England
Bikes owned: GT550s GT750 GSX1400 and lots of spares
Unfortunately, these things cost what they cost. Unless someone who can split and rebuild the crank correctly does the job, it's likely that it will end up scrap.
Have you tried a ski do (or similar) dealer to see who they recommend?
There's this on ebay in the US - 173734159994 . But they're all a similar price. There's no such thing as a cheap leisure activity nowadays.


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 Post subject: Re: Yikes~!!
PostPosted: Sun May 12, 2019 1:08 pm 
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On the street

Joined: Sat Aug 26, 2017 6:09 am
Posts: 35
Country: Canada
Bikes owned: h1,gs550,rz350/sv650/kh400
Very true. There is no getting around a certain amount of cost. The main advantage I can see in having the old bearings machined to accept a standard size bearing is longevity. You only have to have them done once. All future crank rebuilds would just require new bearings pressed into the housing. There are replacement bearings available from places like CI but if those sources should ever dry up then what?
The other Idea I am toying with is looking at a change to the lubrication of the center bearings.As near as I can figure they are lubricated from the gearbox oil.Seems a bit odd to go this route as it requires extra seals. If the bearings could be lubed from the crankcase oil the same as the outer two bearings then likely a standard bearing of the correct dimensions could be used like in the rd350 motors.It would likely require the addition of an extra oil line to supply some oil to the bearings.

I have looked at some snowmobile crank bearings but only online. Some do look similar to the t500 bearings but I would have to see them in person to see if there is any potential there.


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 Post subject: Re: Yikes~!!
PostPosted: Sat May 18, 2019 5:05 pm 
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On the street

Joined: Sat Aug 26, 2017 6:09 am
Posts: 35
Country: Canada
Bikes owned: h1,gs550,rz350/sv650/kh400
Ok after some more research, i've learned that the extra two seals are needed in the center of the crank regardless of how the center bearing is lubed. They isolate the CC compression for the individual cylinders. However there is still some potential here for alternate bearings. I am still leaning toward adding separate oil lines for the center bearings.Personally I prefer to have the bearings always getting fresh oil as opposed to oil that is shared with the transmission.I will have to rebuild my oil pump and test it just to make sure it can provide adequate oil volume if two extra lines are added.


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