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1974 GT80A front forks

  • principal282
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1974 GT80A front forks was created by principal282

I have my forks apart, cleaned, ready for seals.one problem.the two inner tubes seem slightly different.  Also, a thin tiny tube came out of one, but not the other one!!  If it is in there, it may be rusted to the inner wall.see pics.  Washers were not too happy to come out either.what makes r and L different ?  Do both sides use a spacer tube? 

see link for photo

imgur.com/gallery/pTiyZzW

 
Last edit: 28 Jul 2023 18:21 by principal282. Reason: I’m slow
28 Jul 2023 18:18 #1

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Replied by RT325 on topic 1974 GT80A front forks

I can only go by partzilla which isn't easy to follow but shows two springs so i'd think there'd be two long preload spacers but shows fork tube 'stansion' as 7 & 8 different numbers plus yours look like a bush or something on the right one near the bottom but not 'at' the bottom. I''m useless sorry. I guess you've looked on partzilla or similar.
www.partzilla.com/catalog/yamaha/motorcy...nt-fork-front-fender
28 Jul 2023 20:48 #2

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Replied by principal282 on topic 1974 GT80A front forks

Yes looked there and also the factory service book.  
I am soaking er in pb blaster on the inside hopefully she comes free thanks!!
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28 Jul 2023 21:04 #3

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Replied by principal282 on topic 1974 GT80A front forks

I know there is a tube there.  I can drop the cleaned up tube in one she goes all the way. In the other one she stops about 7!inches short. Any great ideas how to free the bugger??
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29 Jul 2023 06:58 #4

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Replied by dubepj on topic 1974 GT80A front forks

Doing same job on mine. Took apart long time ago. Forgot to label left and right. Can some one help me identify which is which?
09 Aug 2023 09:27 #5

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Replied by MarkT on topic 1974 GT80A front forks

"Doing same job on mine. Took apart long time ago. Forgot to label left and right. Can some one help me identify which is which?"

One lower has a brake lug.  Front brake is on the left side sitting on the bike.
1963 YG1-T, 1965 MG1-T, Allstate 250, 1970 CT1b, 1971 R5, 1973 AT3MX, 1974 TS400L, 1975 RD350, 1976 DT175C, 1976 Husqvarna 250CR, 1981 DT175G, 1988 DT50, 1990 "Super" DT50, 1991 RT180, 2017 XT250
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09 Aug 2023 10:11 #6

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Replied by dubepj on topic 1974 GT80A front forks

Thanks for reply MarkT. I'm aware of the Brake lug on the left side.
My concern is the sliders that go inside the fork leg. They are different. One is a bit longer. i think the shorter on is on the right side as the oil capacity is more on that side. (96 ml on Left and 120 ml on right)
Please correct me if I'm not right. Thanks
10 Aug 2023 07:35 #7

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Replied by dubepj on topic 1974 GT80A front forks

Next question
I believe fork seals are 26 MM x 37 MM x 10.5 MM ordered some but Amazon says I can get refund. If that's correct size I'll try local seal store.
10 Aug 2023 07:54 #8

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Replied by Ht1kid on topic 1974 GT80A front forks

You need to go by the numbers on the seal be sure to take them with you so they can get the correct seals for you 
10 Aug 2023 15:37 #9

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Replied by RT325 on topic 1974 GT80A front forks

Is there a difference in the position of the lower bush on the fork tube between left & right--can't think why, but show different numbers between 8 & 7, so does 7 pic give a clue because 8 is hidden. Mystery.

www.partzilla.com/catalog/yamaha/motorcy...nt-fork-front-fender
10 Aug 2023 16:49 #10

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