OzVMX Forum

Marque Remarks => Yamaha => Topic started by: steve234 on March 23, 2010, 05:14:24 pm

Title: TT500 FRONT HUB
Post by: steve234 on March 23, 2010, 05:14:24 pm

What's the best front hub and backing plate to use on a 1977 TT500?

Can you interchange between brands ie. honda had a tls setup on the early XR500's?

I am using the TT forks as i am piston broke!

Cheers,
Steve

Title: Re: TT500 FRONT HUB
Post by: LWC82PE on March 23, 2010, 05:44:59 pm

What do you mean by best?

best as in easiest to fit? or best as in best stopping power?

If you want the best possible hub with less rooting around modifying things then go with the standard TT or IT hub which is the same.
If you want the best stopping power then fit a larger XT hub.

You say you have 77 TT forks. They are still staight inline axle forks and not leading axle. The first model with leading axle was the 79 TT and the the XT followed in 1980. You wont be able to fit YZ/IT or even a Honda TLS brake to the inline axle forks very easily if at all. I wouldnt recommend to do it anyway and it will look out of place on those forks if you can even get it all to fit. if you want a TLS brake then fit a matching TLS brake/forks off another bike.

If you have your heart set on fitting a hub off another model then watch out for different axle sizes and different locations/widths of the slot in the brake plates that engage in the fork leg.

Title: Re: TT500 FRONT HUB
Post by: steve234 on March 23, 2010, 10:38:44 pm

Just after an easy fit i guess. Thanks for the heads up, i'll start looking for the stock set up in the wanted forum.

Title: Re: TT500 FRONT HUB
Post by: GMC on March 23, 2010, 11:24:20 pm

Not sure what you are trying to do?
Do you have the TT hub at the moment because if you do then it's the same hub for many models, it's the backing plate that changed over the years.

I always thought this was a better hub than the larger XT hub ???

Part # = 1K7-25111-10-98
Part Description = HUB,FRONT LOW GLOSS BLACK
Model Count = 37
IT175D 1977 175 IT175 Dual-Purpose
IT175E 1978 175 IT175 Dual-Purpose
IT175F 1979 175 IT175 Dual-Purpose
IT175G 1980 175 IT175 Dual-Purpose
IT175H 1981 175 IT175 Dual-Purpose
IT250D 1977 250 IT250 Dual-Purpose
IT250E 1978 250 IT250 Dual-Purpose
IT250F 1979 250 IT250 Dual-Purpose
IT250G 1980 250 IT250 Dual-Purpose
IT250H 1981 250 IT250 Dual-Purpose
IT400C 1976 400 IT400 Dual-Purpose
IT400D 1977 400 IT400 Dual-Purpose
IT400E 1978 400 IT400 Dual-Purpose
IT400F 1979 400 IT400 Dual-Purpose
IT425G 1980 425 IT425 Dual-Purpose
IT465H 1981 465 IT465 Dual-Purpose
TT250G 1980 250 TT250 Off-Road
TT500D 1977 500 TT500 Off-Road
TT500F 1979 500 TT500 Off-Road
TT500G 1980 500 TT500 Off-Road
TT500H 1981 500 TT500 Off-Road
YZ100D 1977 100 YZ100 Competition Motocross
YZ125D 1977 125 YZ125 Competition Motocross
YZ125E 1978 125 YZ125 Competition Motocross
YZ125F 1979 125 YZ125 Competition Motocross
YZ125G 1980 125 YZ125 Competition Motocross
YZ125H 1981 125 YZ125 Competition Motocross
YZ250D 1977 250 YZ250 Competition Motocross
YZ250E 1978 250 YZ250 Competition Motocross
YZ250F 1979 250 YZ250 Competition Motocross
YZ250G 1980 250 YZ250 Competition Motocross
YZ250H 1981 250 YZ250 Competition Motocross
YZ400D 1977 400 YZ400 Competition Motocross
YZ400E 1978 400 YZ400 Competition Motocross
YZ400F 1979 400 YZ400 Competition Motocross
YZ465G 1980 465 YZ465 Competition Motocross
YZ465H 1981 465 YZ465 Competition Motocross

Title: Re: TT500 FRONT HUB
Post by: LWC82PE on March 23, 2010, 11:35:46 pm

TT 500 - 130 X 22mm brake
XT 500 - 160 X 25mm brake

what is better?

lighter weight then the TT hub is the go
more stoping power then the XT is the go

Title: Re: TT500 FRONT HUB
Post by: steve234 on March 24, 2010, 09:46:15 am

Thanks GMC, no i don't have a hub hence the search. Now i have an idea what to look for Thanks!

Title: Re: TT500 FRONT HUB
Post by: GMC on March 24, 2010, 11:15:50 am

Those Hubs above are to suit your model, assuming you have 77 D model forks.
The backing plates changed over the years to suit different forks, mostly the backing plate lugs.
The backing plate to suit your forks and the above hub is....

Part # = 483-25121-00-98
Part Description = PLATE,BRAKE SHOE
Model Count = 12
IT400C 1976 400 IT400 Dual-Purpose
MX250B 1975 250 MX250 Off-Road
MX400B 1975 400 MX400 Off-Road
TT500C 1976 500 TT500 Off-Road
TT500D 1977 500 TT500 Off-Road
YZ100C 1976 100 YZ100 Competition Motocross
YZ125C 1976 125 YZ125 Competition Motocross
YZ175C 1976 175 YZ175 Competition Motocross
YZ250B 1975 250 YZ250 Competition Motocross
YZ250C 1976 250 YZ250 Competition Motocross
YZ360B 1975 360 YZ360 Competition Motocross
YZ400C 1976 400 YZ400 Competition Motocross


Further research shows that the lower left fork leg came from the following models, therefore any of these backing plates will also fit your forks

Part # = 1T2-23126-00-00
Part Description = TUBE,OUTER 1
Model Count = 5
TT500D 1977 500 TT500 Off-Road
XT500D 1977 500 XT500 Dual Purpose
XT500E 1978 500 XT500 Dual Purpose
XT500E-205001 1978 500 XT500 Dual Purpose
XT500F 1979 500 XT500 Dual Purpose


And the hub to suit this backing plate can be found on...

Part # = 1E6-25111-00-98
Part Description = HUB,FRONT LOW GLOSS BLACK
Model Count = 12
DT250D 1977 250 DT250 Dual Purpose
DT250E 1978 250 DT250 Dual Purpose
DT250F 1979 250 DT250 Dual Purpose
DT400D 1977 400 DT400 Dual Purpose
DT400E 1978 400 DT400 Dual Purpose
XT500C 1976 500 XT500 Dual Purpose
XT500D 1977 500 XT500 Dual Purpose
XT500E 1978 500 XT500 Dual Purpose
XT500E-205001 1978 500 XT500 Dual Purpose
XT500F 1979 500 XT500 Dual Purpose
XT500G 1980 500 XT500 Dual Purpose
XT500H 1981 500 XT500 Dual Purpose


Keep in mind that the TT & XT hubs are different sizes so you can’t mix and match the XT backing plate with TT hub