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PostPosted: Thu Dec 27, 2018 5:35 am 
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On the main road

Joined: Thu Nov 07, 2013 1:59 pm
Posts: 174
Country: United Kingdom
Bikes owned: A100 GT250 & 4t Yams!
Hi All

Anyone know the part number for the upper race (loose one not frame inserted) for the GT250? There's one on ebay but it doesn't look like the
badly pitted one I just removed.

Cheers


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PostPosted: Thu Dec 27, 2018 6:24 am 
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To the on ramp

Joined: Fri Aug 11, 2017 7:09 am
Posts: 415
Country: england
Bikes owned: several gt250 ramairs
hi dax, it should be this one:
https://www.ebay.co.uk/itm/Genuine-New- ... ctupt=true

cheers, dd.

_________________
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: Thu Dec 27, 2018 7:35 am 
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On the main road

Joined: Thu Nov 07, 2013 1:59 pm
Posts: 174
Country: United Kingdom
Bikes owned: A100 GT250 & 4t Yams!
Hi Thanks - that was the one I was looking at but mine is different. on the non-bearing side it has a raised lip on the inner diameter and on the bearing side there is more of a 'channel'. I guess I should just buy it and see.


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PostPosted: Thu Dec 27, 2018 3:22 pm 
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To the on ramp

Joined: Fri Aug 11, 2017 7:09 am
Posts: 415
Country: england
Bikes owned: several gt250 ramairs
hi dax, judging by your description you've got an outer race, instead of an inner. the very top race should fit inside the balls and push them out slightly, so they sit right on the race that's inside the frame. then your plastic cover, then the threaded castle nut. hope that all makes sense? :D
cheers, dd.

_________________
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: Sat Dec 29, 2018 4:19 am 
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On the main road

Joined: Thu Nov 07, 2013 1:59 pm
Posts: 174
Country: United Kingdom
Bikes owned: A100 GT250 & 4t Yams!
In my hand is the upper race I removed to the left is the race in the headstock.. Similar to look at but not quite the same.

Image
Image

..if you can even see photos from google that is.


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PostPosted: Tue Jan 01, 2019 7:18 am 
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To the on ramp

Joined: Fri Aug 11, 2017 7:09 am
Posts: 415
Country: england
Bikes owned: several gt250 ramairs
sorry mate, but can't see your photo, but very top race should have no side on it, if that makes sense? basically if you put a ball bearing on the race surface itself, it would roll off until you stick it with grease, there's nothing to hold it there, unlike the next race down, which has a side to it. get your bottom yoke and drop the new top race on it [the one on ebay], it should drop down to a shoulder just below the threads on the steering stem, then it should stop, and it's correct. if it doesn't, then it's the very bottom race that sits on the bottom yoke. they look very similar, but the bottom one has a slightly bigger i.d. :D phew :D
cheers, dd.
try this.
Image

_________________
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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 Profile  
 
PostPosted: Fri Jan 04, 2019 5:03 am 
Offline
On the main road

Joined: Thu Nov 07, 2013 1:59 pm
Posts: 174
Country: United Kingdom
Bikes owned: A100 GT250 & 4t Yams!
Hi DD

Thanks - looks like someone in the past 40+ years has screwed up and swapped things about.. :wth:
BTW do you know if both top and bottom balls shoud be 1/4" ? - mine are!

Cheers


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PostPosted: Fri Jan 04, 2019 9:11 am 
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To the on ramp

Joined: Fri Aug 11, 2017 7:09 am
Posts: 415
Country: england
Bikes owned: several gt250 ramairs
balls all same size at 1/4 inch as you say. just don't forget to leave one out when you refit them - but suppose you know that anyway :D odd how jap bikes always used imperial sized ball bearings isn't it? :D
cheers, dd.

_________________
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.


Top
 Profile  
 
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