GS tranny in a GT750 box

Getting your blazingly fast Suzuki powerplant to perform even better!

Moderators: oldjapanesebikes, H2RICK, diamondj, Suzsmokeyallan

Post Reply
User avatar
tz375
Moto GP
Posts: 6213
Joined: Mon Nov 03, 2008 10:47 am
Location: Illinois

Post by tz375 »

Dave and I discussed that and while it has some advantages, we decided that it was easier for anyone else following along to machine the shaft.
User avatar
Suzsmokeyallan
Moto GP
Posts: 4326
Joined: Fri Oct 24, 2008 9:11 am
Location: Mostly Barbados, sometimes Florida and western Canada
Contact:

Post by Suzsmokeyallan »

Well the second output shaft is completed, the bearing was machined as the previous photo showed, the seal hole has been machined and the bigger oil hole for the 1st gear has been altered and it fits perfectly.

Image
Both GS output shafts finished, the upper one has had the bearing machined, the lower one has had the shaft flange machined.

Image
Close up view of oil seal in output shaft end

Image
Second output shaft with altered bearing seated in the case
Two strokes, its just that simple.

69 Suz U70
69 Suz T500
72 Suz GT750 cafe
74 Suz TS250
74 Suz GTXVR project
75 Suz RE5
75 Suz GT750
76 Suz TS400
76 Suz GT750
81 Suz GSX1100
86 Suz RG500x2
88 Hon CR500
93 Hon CBR900RR
98 Suz GSF1200x3
15 Kaw Ninja H2
User avatar
Suzsmokeyallan
Moto GP
Posts: 4326
Joined: Fri Oct 24, 2008 9:11 am
Location: Mostly Barbados, sometimes Florida and western Canada
Contact:

Post by Suzsmokeyallan »

Back at this again and now its nearly finished, the clutch shaft was cut down approx 4mms and i tapered the edge slightly. Then i cut back the splines by approx 2mms to allow the nut to seat a bit further up the shaft since the threads are now shorter.
Next up ,i cut in the rebate for the oil seal at the shafts end and finally cut down the inner clutch basket splines so they match the taper of the GS shaft.
Remember the GS shaft is a bit longer and the splines dont go back quite far enough so a little dressing of the inner basket makes it now clear perfectly.
I just need to clean up everything, dress some of the rough edges and make it have some finesse to its looks.

Image
Shaft end cut and ready for a little cleaning up.


Image
Cut into the rear splines of the inner basket, its a near perfect taper to the GS shaft.


Image
Ok thats it, we are nearly good to go, all but for the final going over and a wash and tidying up of all the parts.
Two strokes, its just that simple.

69 Suz U70
69 Suz T500
72 Suz GT750 cafe
74 Suz TS250
74 Suz GTXVR project
75 Suz RE5
75 Suz GT750
76 Suz TS400
76 Suz GT750
81 Suz GSX1100
86 Suz RG500x2
88 Hon CR500
93 Hon CBR900RR
98 Suz GSF1200x3
15 Kaw Ninja H2
User avatar
Suzukidave
Moto GP
Posts: 3980
Joined: Fri Oct 24, 2008 5:55 pm
Country: US
Suzuki 2-Strokes: GT750 x2 97 -1200 Bandit 86 GSXR1100
Location: Lancaster Pa.

Post by Suzukidave »

tz375 wrote:Dave and I discussed that and while it has some advantages, we decided that it was easier for anyone else following along to machine the shaft.
I really didnt think there was enough metal there to machine off to make up the 1.6mm that was needed removed , it looks like Allan proved that wrong so there's 2 methods to getting the bearings to line up with the case . I deleted my comment about thinking it wouldnt work :oops: nice work Allan :D
the older i get the faster i was
User avatar
Suzsmokeyallan
Moto GP
Posts: 4326
Joined: Fri Oct 24, 2008 9:11 am
Location: Mostly Barbados, sometimes Florida and western Canada
Contact:

Post by Suzsmokeyallan »

Dave the good thing is the bearings have a really wide shoulder and if you look at the picture of the bearing even with the side cut away its still got loads of material left.
I did the alteration both ways and ill tell you now i prefer to cut the bearing than the shaft, plus its easier and faster.
Two strokes, its just that simple.

69 Suz U70
69 Suz T500
72 Suz GT750 cafe
74 Suz TS250
74 Suz GTXVR project
75 Suz RE5
75 Suz GT750
76 Suz TS400
76 Suz GT750
81 Suz GSX1100
86 Suz RG500x2
88 Hon CR500
93 Hon CBR900RR
98 Suz GSF1200x3
15 Kaw Ninja H2
User avatar
Suzukidave
Moto GP
Posts: 3980
Joined: Fri Oct 24, 2008 5:55 pm
Country: US
Suzuki 2-Strokes: GT750 x2 97 -1200 Bandit 86 GSXR1100
Location: Lancaster Pa.

Post by Suzukidave »

Works for me :D I think i have been up staged :roll:
the older i get the faster i was
User avatar
Suzukidave
Moto GP
Posts: 3980
Joined: Fri Oct 24, 2008 5:55 pm
Country: US
Suzuki 2-Strokes: GT750 x2 97 -1200 Bandit 86 GSXR1100
Location: Lancaster Pa.

Post by Suzukidave »

Richard , did you get your modified shafts back yet ?
the older i get the faster i was
User avatar
tz375
Moto GP
Posts: 6213
Joined: Mon Nov 03, 2008 10:47 am
Location: Illinois

Post by tz375 »

No time to take them there yet, but I'm having the flange machined - not the bearing.

I needed a distraction this afternoon, so I dug out a couple of si speeds and am trying to work through the issues there. The two shafts are two mm further apart for a start and about 7mm wider, so that gets us off to a good start and then the gears are larger diameter so they won't work with the oil pump drive gear.

Other than that it's pretty much a straight swap. :roll: :lol: :lol: :twisted: :twisted:
User avatar
Suzsmokeyallan
Moto GP
Posts: 4326
Joined: Fri Oct 24, 2008 9:11 am
Location: Mostly Barbados, sometimes Florida and western Canada
Contact:

Post by Suzsmokeyallan »

Two strokes, its just that simple.

69 Suz U70
69 Suz T500
72 Suz GT750 cafe
74 Suz TS250
74 Suz GTXVR project
75 Suz RE5
75 Suz GT750
76 Suz TS400
76 Suz GT750
81 Suz GSX1100
86 Suz RG500x2
88 Hon CR500
93 Hon CBR900RR
98 Suz GSF1200x3
15 Kaw Ninja H2
pjmcburney
To the on ramp
Posts: 342
Joined: Tue Feb 17, 2009 1:20 am
Country: Australia
Suzuki 2-Strokes: T20 GT750L RE5A GSX1100S RG500G GSX-R1100N
Location: QLD

Post by pjmcburney »

Suzsmokeyallan wrote:For the fun of it i did this little two part video.

http://www.youtube.com/watch?v=7W09UbbrQcA

http://www.youtube.com/watch?v=XMaK_7PotD4

Thanks mon!

Great vids, very informative. :P

I have a GS 'box, now all I need to do is find a machinist...

I'll send you some pics of gauges soon too.


Cheers
Paul
User avatar
Suzsmokeyallan
Moto GP
Posts: 4326
Joined: Fri Oct 24, 2008 9:11 am
Location: Mostly Barbados, sometimes Florida and western Canada
Contact:

Post by Suzsmokeyallan »

Actually the 'mon' thing is for Jamaicans. Maybe you would have preferred if id done it in a British accent possibly,LOLOLOL
Two strokes, its just that simple.

69 Suz U70
69 Suz T500
72 Suz GT750 cafe
74 Suz TS250
74 Suz GTXVR project
75 Suz RE5
75 Suz GT750
76 Suz TS400
76 Suz GT750
81 Suz GSX1100
86 Suz RG500x2
88 Hon CR500
93 Hon CBR900RR
98 Suz GSF1200x3
15 Kaw Ninja H2
pjmcburney
To the on ramp
Posts: 342
Joined: Tue Feb 17, 2009 1:20 am
Country: Australia
Suzuki 2-Strokes: T20 GT750L RE5A GSX1100S RG500G GSX-R1100N
Location: QLD

Post by pjmcburney »

Suzsmokeyallan wrote:Actually the 'mon' thing is for Jamaicans. Maybe you would have preferred if id done it in a British accent possibly,LOLOLOL

'Mon' was deliberate - it sounds (to me anyway) like you've been living in the isles for a while now! :wink:


Cheers
Paul
User avatar
Suzsmokeyallan
Moto GP
Posts: 4326
Joined: Fri Oct 24, 2008 9:11 am
Location: Mostly Barbados, sometimes Florida and western Canada
Contact:

Post by Suzsmokeyallan »

Oh the joys of being a muti-national person, however i was born here on the island, but trust me when i say i do not have a true Barbadian accent, thats a whole other kettle of fish if you heard it for yourself.
I was wondering if you had forgotten about those gauges Paul or decided to handle that task yourself, ok so i'll be waiting for them.
Two strokes, its just that simple.

69 Suz U70
69 Suz T500
72 Suz GT750 cafe
74 Suz TS250
74 Suz GTXVR project
75 Suz RE5
75 Suz GT750
76 Suz TS400
76 Suz GT750
81 Suz GSX1100
86 Suz RG500x2
88 Hon CR500
93 Hon CBR900RR
98 Suz GSF1200x3
15 Kaw Ninja H2
User avatar
tz375
Moto GP
Posts: 6213
Joined: Mon Nov 03, 2008 10:47 am
Location: Illinois

Post by tz375 »

Allan,

Paul's an Aussie and he can take the piss out of any accent if he sets his mind to it. :roll:
pjmcburney
To the on ramp
Posts: 342
Joined: Tue Feb 17, 2009 1:20 am
Country: Australia
Suzuki 2-Strokes: T20 GT750L RE5A GSX1100S RG500G GSX-R1100N
Location: QLD

Post by pjmcburney »

tz375 wrote:Allan,

Paul's an Aussie and he can take the piss out of any accent if he sets his mind to it. :roll:
I resemble that remark. :o
If you heard the way I sound, you'd understand why. :D

Richard, I sincerely hope you've maintained some 'Strine' since your departure from these shores. Don't forget to also drop a few 'struth!'s, 'stone the crows' or 'dry as a dead-dingo's donger' into conversation from time to time for me...


And Allan,

I've not forgotten about the gauges, just been a bit busy. :oops:

Will try to get pics out this weekend...


Cheers
Paul
Post Reply