Suzuki2Strokes.com

Sundial Moto Sports

Suzuki Two-Stroke Message Board
Suzuki2Strokes.com
It is currently Fri Jul 10, 2020 8:22 pm

All times are UTC - 6 hours




Post new topic Reply to topic  [ 15 posts ] 
Author Message
 Post subject: Yikes~!!
PostPosted: Mon Sep 18, 2017 12:11 pm 
Offline
On the street

Joined: Sat Aug 26, 2017 6:09 am
Posts: 43
Country: Canada
Suzuki 2-Strokes: h1,gs550,rz350/sv650/kh400/t500
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.


Top
 Profile  
 
 Post subject: Re: Yikes~!!
PostPosted: Tue Sep 19, 2017 6:26 am 
Offline
To the on ramp

Joined: Sat Jun 28, 2014 1:22 am
Posts: 229
Country: United Kingdom
Suzuki 2-Strokes: 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.


Top
 Profile  
 
 Post subject: Re: Yikes~!!
PostPosted: Tue Sep 19, 2017 7:10 am 
Offline
On the street

Joined: Sat Aug 26, 2017 6:09 am
Posts: 43
Country: Canada
Suzuki 2-Strokes: h1,gs550,rz350/sv650/kh400/t500
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.


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

Joined: Sat Jun 28, 2014 1:22 am
Posts: 229
Country: United Kingdom
Suzuki 2-Strokes: 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


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

Joined: Sat Aug 26, 2017 6:09 am
Posts: 43
Country: Canada
Suzuki 2-Strokes: h1,gs550,rz350/sv650/kh400/t500
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.


Top
 Profile  
 
 Post subject: Re: Yikes~!!
PostPosted: Mon Apr 01, 2019 11:09 am 
Offline
Around the block
User avatar

Joined: Mon Apr 06, 2015 6:17 pm
Posts: 66
Location: ottawa, ontario, canada
Country: Canada
Suzuki 2-Strokes: 1975 T500, 1983 SP250
curious, what you decided on in the end? can we get an update?


Top
 Profile  
 
 Post subject: Re: Yikes~!!
PostPosted: Sat May 11, 2019 2:35 pm 
Offline
On the street

Joined: Sat Aug 26, 2017 6:09 am
Posts: 43
Country: Canada
Suzuki 2-Strokes: h1,gs550,rz350/sv650/kh400/t500
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.


Top
 Profile  
 
 Post subject: Re: Yikes~!!
PostPosted: Sat May 11, 2019 11:58 pm 
Offline
World Superbike
User avatar

Joined: Thu Feb 16, 2012 11:50 am
Posts: 2350
Location: The Republic of South Yorkshire
Country: England
Suzuki 2-Strokes: 2 x GT550s GT750, T200, TC200
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.

_________________
Think of how stupid the average person is, then realise that half of them are more stupid than that.


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

Joined: Sat Aug 26, 2017 6:09 am
Posts: 43
Country: Canada
Suzuki 2-Strokes: h1,gs550,rz350/sv650/kh400/t500
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.


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

Joined: Sat Aug 26, 2017 6:09 am
Posts: 43
Country: Canada
Suzuki 2-Strokes: h1,gs550,rz350/sv650/kh400/t500
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.


Top
 Profile  
 
 Post subject: Re: Yikes~!!
PostPosted: Sun Sep 15, 2019 4:53 am 
Offline
On the street

Joined: Sat Aug 26, 2017 6:09 am
Posts: 43
Country: Canada
Suzuki 2-Strokes: h1,gs550,rz350/sv650/kh400/t500
Finally after several delays, I am making some progress. I had to build a press for doing the cranks.It is nearly done. I have taken the bearings in to a local shop to find out the cost to have them machined. It turns out it is very reasonable. They quoted me $35.00 cad. each bearing to machine if I remove the guts of the old bearings.The bearings that will be pressed into the old housings will run about $100 for a set of three.

I think I have come up with a way to change the lubrication of the center bearings so the are fed by the oil pump rather than dirty transmission oil.

In the mean time I have purchased another gt500. (1976/1977) from a co worker. I hope to bring it home in a few weeks. :D


Top
 Profile  
 
 Post subject: Re: Yikes~!!
PostPosted: Sun Sep 15, 2019 5:34 am 
Offline
World Superbike
User avatar

Joined: Thu Feb 16, 2012 11:50 am
Posts: 2350
Location: The Republic of South Yorkshire
Country: England
Suzuki 2-Strokes: 2 x GT550s GT750, T200, TC200
Why not just change the gearbox oil more often? Clean(er) oil to the bearings and no messing with a pump delivering less feed per bearing per 'squirt'. And as the centre bearing doesn't leak oil to the cranks as the outers do, then where will the oil go after it lubes the centre bearing? Seems a lot of work and cost for little benefit really as there will have to be major rework of the cases.
It worked ok for the T500, GT500 and TR500 for long enough.
Just my take on it - no-one is wrong on a project, but everyone has differnt ways to reinvent something!

_________________
Think of how stupid the average person is, then realise that half of them are more stupid than that.


Top
 Profile  
 
 Post subject: Re: Yikes~!!
PostPosted: Sun Sep 15, 2019 10:08 am 
Offline
On the street

Joined: Sat Aug 26, 2017 6:09 am
Posts: 43
Country: Canada
Suzuki 2-Strokes: h1,gs550,rz350/sv650/kh400/t500
Well at this point its just an idea. have not fully committed. It doesnt look like it will be a real hard task but i obviously dont want to create other issues.It seems as it would require a partial blockage of the passage ways and a small groove cut in the bearing seat where the exit hole for the oil is. This should allow the oil to be drawn into both cylinders via the vacuum. A hole would have to be drilled for a fitting in the top half of the crankcase to feed the oil. When i opened up the crankcases there was a lot of metal shavings in the bottom of the gear box which most certainly led to the destruction of the center bearing. The center one is the biggest pain to replace since it requires the crank to be split.

I am just the type of person that likes to meddle with this sort of thing and will be the first to admit that it doesnt always work for the better. :lol:

Anyhow like I said at this point its merely an Idea.


Top
 Profile  
 
 Post subject: Re: Yikes~!!
PostPosted: Sun Sep 22, 2019 5:50 pm 
Offline
On the street

Joined: Sat Aug 26, 2017 6:09 am
Posts: 43
Country: Canada
Suzuki 2-Strokes: h1,gs550,rz350/sv650/kh400/t500
My bearings are on order and should be here this week. I removed the innards from the crank bearings and they are ready to be machined. As soon as I have the new ones I will drop them off at the shop. By the time i get them back I will have the final bits of my press finished up and will press the new bearings into the housings. :up:


Top
 Profile  
 
 Post subject: Re: Yikes~!!
PostPosted: Mon Feb 10, 2020 3:59 am 
Offline
On the street

Joined: Sat Aug 26, 2017 6:09 am
Posts: 43
Country: Canada
Suzuki 2-Strokes: h1,gs550,rz350/sv650/kh400/t500
Well after quite a long wait my bearings are done. They look great and im glad i decided to go this route.
https://ken-turmon.imgbb.com/" onclick="window.open(this.href);return false;

This does not affect any of the lube holes in the bearings.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 15 posts ] 

All times are UTC - 6 hours


Who is online

Users browsing this forum: No registered users and 45 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to:  
cron
Powered by phpBB® Forum Software © phpBB Group
Sundial Moto Sports forum © by Eric F. Kalamaja
Suzuki2Strokes.com