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PostPosted: Sun Oct 07, 2018 11:04 pm 
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Still in the Driveway

Joined: Sun Oct 07, 2018 7:38 am
Posts: 4
Country: Australia
Bikes owned: T500
Gday All

I have recently acquired a 1974 T500 Titan for restoration, alas the engine was locked very badly and it now disassembled and the crank is off getting rebuilt with new seals.

We tried all sorts of trickery to unlock the engine but she was seized solid and after freeing her up, we noticed a crack in the bottom liner, so I located a NOS T500J cylinder and purchased it. It arrived on Friday and I have noticed on the intake that the original barrels had a small amount of casting on the intake whereas my new barrel has a larger section which comes out almost to where the carb manifold bolts on. I did check the parts list for the T500 and noticed 2 different barrel types, one for the first Cobra and a later one that was used on the t500 II , T500 III, T500R and T500J. I could not locate a parts book for a T500L, but I had read there werent too many changes to the engine except for the plastic part to protect 5th gear.

parts list is here - http://www.ozebook.com/compendium/T500parts/image4.htm" onclick="window.open(this.href);return false;" onclick="window.open(this.href);return false;

The guy I bought the barrel off swears it is off a T500J, he purchased a pair, but only needed the RH one, hence why it was up for sale.

So to the Suzuki brains trust on here, can I use a cylinder with a slightly different intake ? if so, and will it happily co-exist with my old RH cylinder ? Or did the T500l ship with different barrels to the T500J ? if anyone has a link to a T500L parts book, it would be greatly appreciated.

Attached is a pic of the bike and the barrels and head after I wet blasted them.


thanks

Chris
Brisbane Australia


Attachments:
T500_engine_cases.jpg
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barrels.jpg
barrels.jpg [ 71.53 KiB | Viewed 212 times ]
heads.jpg
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crack.jpg
crack.jpg [ 29.05 KiB | Viewed 212 times ]
T500L.JPG
T500L.JPG [ 68.67 KiB | Viewed 212 times ]
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PostPosted: Mon Oct 08, 2018 1:03 am 
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Joined: Mon Dec 01, 2008 2:52 am
Posts: 1155
Location: Manchester, UK
Hi and welcome. Looks like a nice project you have there.

I don't know if there's a T500L parts book here, but it is a goldmine for Suzi 2-stroke manuals: http://www.oldjapanesebikes.com/mraxl_GT_Resource/

The crack in the liner looks like it's just at the bottom of the barrel where it goes into the crankcases, I would think it's possible to get it carefully welded so that it's solid again ... after all, that part of the liner is only there to guide the lower skirt of the piston, it doesn't have to hold compression or anything. As long as the liner is smooth on the inside where the piston skirt passes it, it will work fine. The liners are cast iron so it should be easy to stitch it with the torch.

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1976 GT380 - wounded by me, and sold on
2006 SV650S. It's got cams, and valves, and stuff


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PostPosted: Mon Oct 08, 2018 12:08 pm 
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On the main road
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Joined: Mon Jun 12, 2017 12:01 pm
Posts: 196
Location: Galveston County, Tx.
Country: USA
Bikes owned: '75 T500M since '93 Ridden it over 100,000 mi
Kiffsta wrote:
......I have noticed on the intake that the original barrels had a small amount of casting on the intake whereas my new barrel has a larger section which comes out almost to where the carb manifold bolts on...... So to the Suzuki brains trust on here, can I use a cylinder with a slightly different intake ? if so, and will it happily co-exist with my old RH cylinder ? Or did the T500l ship with different barrels to the T500J ?
This took a bit of doing but I remembered a couple of keywords to search the archives that I remember back in 2007 from the old Sundial site for when the subject, that I know of, first came up. I had uploaded some pictures from that thread or from somewhere else of the difference in the ports but I was using photobucket and I'm not sure I can get back in there now.


http://suzuki2strokes.com/forum/viewtop ... start=5145"

http://suzuki2strokes.com/forum/viewtop ... nce#p86361"

http://suzuki2strokes.com/forum/viewtop ... nce#p60712"

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PostPosted: Mon Oct 08, 2018 2:38 pm 
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On the main road
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Joined: Mon Jun 12, 2017 12:01 pm
Posts: 196
Location: Galveston County, Tx.
Country: USA
Bikes owned: '75 T500M since '93 Ridden it over 100,000 mi
I just noticed :oops: , that is an early 1200cc capacity crankcase ...or at least the top half of one. Not a 1974. I guess you have already realized that....you had mentioned in passing about the oil dam part. Makes me wonder which carburetors you have also.


Bike looks nice.....excellent candidate for your restoration plans and Welcome to Sundial

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PostPosted: Mon Oct 08, 2018 5:12 pm 
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Still in the Driveway

Joined: Sun Oct 07, 2018 7:38 am
Posts: 4
Country: Australia
Bikes owned: T500
thanks for your warm welcome and advice, I tracked down a T500L parts book and the pn's are most definitely different

T500
LH 11220-15001
RH 11210-15001

T500II, T500 III, T500R, T500J
LH 11220-15100
RH 11210-15100

T500L
LH 11220-15301
RH 11210-15301

so now I am at a crossroads, I posted on the ozebook Facebook page chasing some replacement barrels and was told it is okay to cut away the broken section, the guys on there on posted these pics.


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PostPosted: Mon Oct 08, 2018 5:25 pm 
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Still in the Driveway

Joined: Sun Oct 07, 2018 7:38 am
Posts: 4
Country: Australia
Bikes owned: T500
dorT500 wrote:
I just noticed :oops: , that is an early 1200cc capacity crankcase ...or at least the top half of one. Not a 1974. I guess you have already realized that....you had mentioned in passing about the oil dam part. Makes me wonder which carburetors you have also.


Bike looks nice.....excellent candidate for your restoration plans and Welcome to Sundial



Is there a way to identify my engine build year from the engine number ?


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PostPosted: Tue Oct 09, 2018 3:34 am 
Online
To the on ramp

Joined: Fri Aug 11, 2017 7:09 am
Posts: 280
Country: england
Bikes owned: several gt250 ramairs
engine numbers should be as follows:
1971 - 30848 up to ????? 1972 engine numbers missing off my chart.
1972 - ????? up to 59779.
1973 - 59780 up to 68083.
1974 - 68084 up to 74198
hope this helps? :D
cheers, dd.

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GTS250 road registered. TS250 engine, Ramair frame.
GT250 big bang road registered. Both pistons fire the same time. USD forks.
GT285 road registered. Overbored - 58mm and TS125 +2 pistons fitted.
GT10 road registered. '65 T10 engine, GT250 frame.


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PostPosted: Tue Oct 09, 2018 5:40 am 
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Joined: Mon Dec 01, 2008 2:52 am
Posts: 1155
Location: Manchester, UK
That's a good point about cutting away the broken section, as those sections are at the side of the piston it shouldn't make any difference. The piston skirt is still supported at the front & rear. If the cylinders are otherwise OK and within spec apart from the crack in the liner, I'd suggest just cutting the buggers and smoothing off the corners, as per the pics. :up:

_________________
1976 GT380 - wounded by me, and sold on
2006 SV650S. It's got cams, and valves, and stuff


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PostPosted: Tue Oct 09, 2018 6:49 am 
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Still in the Driveway

Joined: Sun Oct 07, 2018 7:38 am
Posts: 4
Country: Australia
Bikes owned: T500
dollydog wrote:
engine numbers should be as follows:
1971 - 30848 up to ????? 1972 engine numbers missing off my chart.
1972 - ????? up to 59779.
1973 - 59780 up to 68083.
1974 - 68084 up to 74198
hope this helps? :D
cheers, dd.


Mine is 7023x, definitely a 74 then


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PostPosted: Tue Oct 09, 2018 12:02 pm 
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On the main road
User avatar

Joined: Mon Jun 12, 2017 12:01 pm
Posts: 196
Location: Galveston County, Tx.
Country: USA
Bikes owned: '75 T500M since '93 Ridden it over 100,000 mi
dorT500 wrote:
I just noticed :oops: , that is an early 1200cc capacity crankcase ...or at least the top half of one. Not a 1974.....



Kiffsta wrote:
......Mine is 7023x, definitely a 74 then
Again, the upper half of the crankcase you showed is from an earlier crankcase. It is not from a 1974. You can poke around the info below if you want but the main thing to know for sure is if you need or want to do the oil dam modification. It appears that you won't have to if that bottom half is a 74 or 75....factory would have corrected it by then and stamped the top 1400cc but just to know for sure, you can do a quick measurement......

Just a matter of how far to correct you want to go on your restoration.

viewtopic.php?f=2&t=13671"

Here is a '75 with the 1400cc stamp....same as my '74 spare crankcase assembly that is in my '75 T500.

Image


http://suzukits.informe.com/wiki/view/S ... _1971-1981"

http://www.ozebook.com/compendium/techb ... %201-5.pdf"

http://www.ozebook.com/compendium/t500_files/oilmod.htm"

https://www.oldjapanesebikes.com/mraxl_ ... ems/page-5"

viewtopic.php?p=106975"

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PostPosted: Tue Oct 09, 2018 12:32 pm 
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On the main road
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Joined: Mon Jun 12, 2017 12:01 pm
Posts: 196
Location: Galveston County, Tx.
Country: USA
Bikes owned: '75 T500M since '93 Ridden it over 100,000 mi
...and just for the record, here are the stock carbs (note number) for the '74,'75 T500 and U.S. '76 GT500 engines......

Image

Image

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