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 Post subject: ISO gear shift shaft
PostPosted: Sun Nov 12, 2017 5:03 pm 
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On the street

Joined: Mon Sep 11, 2017 9:51 am
Posts: 15
Country: Canada
Bikes owned: 1977 GT500
1977 GT500(b)
Dealer can't help me.
I am looking for part# (in good/useable condition)
25510-15001 SHAFT, gear shifting
also
37721-15002 BODY, gear shifting switch


Thanks
Larry


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 Post subject: Re: ISO gear shift shaft
PostPosted: Tue Nov 14, 2017 3:45 pm 
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On the main road

Joined: Fri Aug 11, 2017 7:09 am
Posts: 136
Country: england
Bikes owned: several gt250 ramairs
hi larry, the only advice i can give you is the shaft was common to the t500 as well - it's showing the same parts number.
and the switch is common to gt250, gt380 etc plus loads more - very common and you can still buy them new :D
cheers, dd.

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RGT250LC road registered. RG250 gamma 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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 Post subject: Re: ISO gear shift shaft
PostPosted: Thu Nov 16, 2017 2:49 pm 
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Still in the Driveway
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Joined: Mon Jun 12, 2017 12:01 pm
Posts: 6
Location: Galveston County, Tx.
Country: USA
Bikes owned: '75 T500M since '93 Ridden it over 100,000 mi
Hey Larry,

The gear shift splines are the same for all the models below. If you can find a a good shaft off another model that has good splines, you can cut off the appropriate length off one of those (about 2" I think, been awhile since I looked at mine) and weld it to your old shaft, after cutting the same length, plus about an 1/8"of your old one. The ends should be ground like below before welding...not like a cone....like a chisel, leaving just a very small gap between them. Welding them in a clean 'V' block will keep them square and even with each other. It needs to be perfectly straight. A good welder will leave just a very small gap.... make his first pass.....flip it over...shine up the weld...second pass....rinse and repeat as needed and grind smooth.

Clutch cover off only to remove and reinstall the gearshift shaft....no need for any case splitting. Just be sure of the add on length...you don't want the shaft to come up short at the engine sprocket cover where the shifting lever installs to the shaft. Better a tad long then short.

Also, you may be able to come across a T500 shifting shaft that had splines on both ends. You wouldn't care if the splines on the leftside were bad....the splines on the rightside would of course be 'virgin' splines.

But.....if you try and mate a a gear shift lever that has just fair to bad splines onto the new or good splines you now would have on the shaft, you could mess up both the shaft splines and the lever splines.


I have had to do this once in the 25 years I have owned my '75 T500M and am now prepared to do it again soon with a spare gear shift lever that is like new. Below are pics of a good spline end next to an old T500 shaft. I cut the end off a GT250 shaft from ebay. The seller had happened to recently electroplate it.

Good Luck

Image
Image



Copied and pasted text from Partszilla website.....

Related Fitment

This Suzuki 25600-18001 LEVER ASSY, GEAR SHIFTING | 1,2; TO 25600-18002 Not Available fits the following models and components:

Suzuki Motorcycle 1969 T305 GEAR SHIFTING

Suzuki Motorcycle 1968 TITAN - T500-2 GEAR SHIFTING

Suzuki Motorcycle 1968 TITAN - T500-3 GEAR SHIFTING

Suzuki Motorcycle 1970 T3501 GEAR SHIFTING

Suzuki Motorcycle 1969 TC305 GEAR SHIFTING

Suzuki Motorcycle 1970 T3502 GEAR SHIFTING

Suzuki Motorcycle 1969 TITAN - T500-3 GEAR SHIFTING

Suzuki Motorcycle 1968 TITAN - T500-1 GEAR SHIFTING

Suzuki Motorcycle 1969 T350R GEAR SHIFTING

Suzuki Motorcycle 1969 T3502 GEAR SHIFTING

Suzuki Motorcycle 1969 T350J GEAR SHIFTING

Suzuki Motorcycle 1969 T3501 GEAR SHIFTING

Suzuki Motorcycle 1969 TITAN - T500-2 GEAR SHIFTING

Suzuki Motorcycle 1969 TITAN - T500-1 GEAR SHIFTING

Suzuki Motorcycle 1970 T350J GEAR SHIFTING

Suzuki Motorcycle 1970 TITAN - T500-2 GEAR SHIFTING

Suzuki Motorcycle 1970 TITAN - T500-3 GEAR SHIFTING

Suzuki Motorcycle 1970 T350R GEAR SHIFTING

Suzuki Motorcycle 1970 TITAN - T500-1 GEAR SHIFTING

Suzuki Motorcycle 1971 T500M GEAR SHIFTING

Suzuki Motorcycle 1971 T500L GEAR SHIFTING

Suzuki Motorcycle 1971 T350J GEAR SHIFTING

Suzuki Motorcycle 1971 REBEL - T350R GEAR SHIFTING

Suzuki Motorcycle 1971 T500K GEAR SHIFTING

Suzuki Motorcycle 1971 T3501 GEAR SHIFTING

Suzuki Motorcycle 1971 T3502 GEAR SHIFTING

Suzuki Motorcycle 1971 TITAN - T500R GEAR SHIFTING

Suzuki Motorcycle 1971 T500J GEAR SHIFTING

Suzuki Motorcycle 1972 REBEL - T3501 GEAR SHIFTING

Suzuki Motorcycle 1972 T500M GEAR SHIFTING

Suzuki Motorcycle 1972 T500L GEAR SHIFTING

Suzuki Motorcycle 1972 REBEL - T3502 GEAR SHIFTING

Suzuki Motorcycle 1972 T500R GEAR SHIFTING

Suzuki Motorcycle 1972 T500K GEAR SHIFTING

Suzuki Motorcycle 1972 T250II GEAR SHIFTING

Suzuki Motorcycle 1972 REBEL - T350J GEAR SHIFTING

Suzuki Motorcycle 1972 T250RJ GEAR SHIFTING

Suzuki Motorcycle 1972 T350R GEAR SHIFTING

Suzuki Motorcycle 1972 TITAN - T500J GEAR SHIFTING

Suzuki Motorcycle 1973 HUSTLER - GT250 GEAR SHIFTING

Suzuki Motorcycle 1973 TITAN 492 - T500K GEAR SHIFTING

Suzuki Motorcycle 1973 T500L GEAR SHIFTING

Suzuki Motorcycle 1973 T500M GEAR SHIFTING

Suzuki Motorcycle 1973 T500R GEAR SHIFTING

Suzuki Motorcycle 1973 T500J GEAR SHIFTING

Suzuki Motorcycle 1974 GT250 GEAR SHIFTING

Suzuki Motorcycle 1974 T500M GEAR SHIFTING

Suzuki Motorcycle 1974 TITAN - T500L GEAR SHIFTING

Suzuki Motorcycle 1974 T500K GEAR SHIFTING

Suzuki Motorcycle 1974 T500J GEAR SHIFTING

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 Post subject: Re: ISO gear shift shaft
PostPosted: Mon Nov 27, 2017 5:33 pm 
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Moto GP
User avatar

Joined: Mon Dec 13, 2010 4:32 pm
Posts: 3027
Location: southwestern Pennsylvania
Country: USA
Bikes owned: 69 T350 thru 75 GT750
Listing on eBay.
https://www.ebay.com/itm/Suzuki-T500-Titan-SM326B-Engine-transmission-shifter-shaft/232571709455

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BAS (Bike Acquisition Syndrome) - too many bikes but have room for more

Suzuki:
GT750 2x75
GT550 72 project & 75
GT380 72
T500 73 project
T350 69, 71 & 72 project
T250 72
Honda 85 CB650SC & 86 CB700SC
Yamaha 75 XS650
09 Triumph Bonneville SE


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 Post subject: Re: ISO gear shift shaft
PostPosted: Tue Feb 06, 2018 7:02 pm 
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On the street

Joined: Mon Sep 11, 2017 9:51 am
Posts: 15
Country: Canada
Bikes owned: 1977 GT500
dorT500 wrote:
Hey Larry,

The gear shift splines are the same for all the models below. .....


Hey dorT500,

I was considering your repair method, and was searching for a Honda 50 shaft since it is same diameter. But then my dealer did a dealer search for the OEM shaft and found one on the shelf in North Carolina, after a lot of back and forth commutation and shipping (to appease the border agents) I finally received it.

However, I kinda wish I'd have grafted on a honda shaft... I can not find a new shift lever! Do all the models you list have a common shift lever too (same bend)?

I see lots on ebay for the 380/550/750, but even if they work their all used, and I'd hate to but a used/worn lever on a new shaft.

Thanks
Larry


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 Post subject: Re: ISO gear shift shaft
PostPosted: Wed Feb 07, 2018 12:04 pm 
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Yeah Man, the Interstate

Joined: Wed Jul 10, 2013 12:04 pm
Posts: 555
Country: England, UK
Bikes owned: FZ50, GP100, RG125 Gamma, GT380, Bandit 1200S
The GT380 ones are still available new. But they are not the same part number as those listed for the GT500


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 Post subject: Re: ISO gear shift shaft
PostPosted: Thu Feb 08, 2018 3:37 am 
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On the street

Joined: Mon Sep 11, 2017 9:51 am
Posts: 15
Country: Canada
Bikes owned: 1977 GT500
I wonder if they share the same spline?

I'll have to see if the shift shafts are common.

If so, I'd buy one and bend the arm to fit if needed.


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 Post subject: Re: ISO gear shift shaft
PostPosted: Thu Feb 08, 2018 3:22 pm 
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Still in the Driveway
User avatar

Joined: Mon Jun 12, 2017 12:01 pm
Posts: 6
Location: Galveston County, Tx.
Country: USA
Bikes owned: '75 T500M since '93 Ridden it over 100,000 mi
Larry710 wrote:
........was searching for a Honda 50 shaft since it is same diameter......
Remember, just because the shaft diameter is the same does not mean the spline milling would be the same as the Suzuki lever splines. Maybe they happen to be....it's just that I don't know.


Larry710 wrote:
.....But then my dealer did a dealer search for the OEM shaft and found one on the shelf in North Carolina,..........
That is quite a find. :up:

Larry710 wrote:
However, I kinda wish I'd have grafted on a honda shaft... I can not find a new shift lever! Do all the models you list have a common shift lever too (same bend)?......
That partszilla fit list is for the shift lever (This list just to show that the splines would be the same on the shift shafts on the various models) and I just noticed that year/letter designations are not all correct but no matter. The lever is for all T500's and missing from the list :? , lever also fits 1976 Gt500A and 1977 GT500B

Here is hoping you can find a gear shift lever that will work for you.

If you do decide to take that new shift shaft out until you find a NOS ($$$) gear shift lever and go with the shaft modification above for whatever reason, just be sure and stay well away from where the leftside seal rides. You don't want any inadvertent grinding, not even a hint of it, in that area because of course the seal would leak. You could even make the splice further inside the crankcase between where the shaft passes through a couple of walls if the donor shaft with the new or at least better spline ends is long enough.

_________________
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GONE.......WITH A PUFF OF SMOKE AND A BLUR OF SPOKE


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 Post subject: Re: ISO gear shift shaft
PostPosted: Thu Feb 08, 2018 5:52 pm 
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Moto GP
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Joined: Mon Nov 03, 2008 10:47 am
Posts: 5871
Location: Illinois
The coarse spline on a GT750 is the same as most/all model GSXRs so I suspect that early triples and twins are probably the same. Bend will be different though, but unless you are doing a concours restoration, almost any hear lever should work.

Yamaha twins and Honda twins share a finer spline, so they won't work for your application.


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