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Frame parts - are the online parts sites wrong?
- Gr8uncleal
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Frame parts - are the online parts sites wrong? was created by Gr8uncleal
On the online parts sites (Partzilla and CMSNL), all of the AT1 and CT1 models are shown as having the two rear engine mount plates that bolt on to the frame, two bolts each side. However, my 1971 CT1C does not have these and when I looked at frames for sale on fleabay, only a frame from a 1969 CT1 had the mounting holes for them, all of the others didn't.
Thanks.
Thanks.
03 Nov 2021 13:19
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- Pete-RT1
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Replied by Pete-RT1 on topic Frame parts - are the online parts sites wrong?
Alan, both my CT1-B and CT1-C have the plates, my CT3 doesn't.
What's your VIN?
What's your VIN?
Yamaha CT1-B
Yamaha CT1-C
Yamaha AT1-E
Yamaha AT1-C
Yamaha CT3
1978 Yamaha DT175MX
2020 Honda CB500X
Yamaha CT1-C
Yamaha AT1-E
Yamaha AT1-C
Yamaha CT3
1978 Yamaha DT175MX
2020 Honda CB500X
03 Nov 2021 15:48
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- MarkT
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Replied by MarkT on topic Frame parts - are the online parts sites wrong?
My CT1’s all have the plates too
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
03 Nov 2021 16:55
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- Gr8uncleal
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Replied by Gr8uncleal on topic Frame parts - are the online parts sites wrong?
Thanks chaps.
Photos of what I believe to be the relevant area attached, plus the frame number.
Hopefully I'm not having a big senior moment!
Photos of what I believe to be the relevant area attached, plus the frame number.
Hopefully I'm not having a big senior moment!
04 Nov 2021 00:26
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- MarkT
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Replied by MarkT on topic Frame parts - are the online parts sites wrong?
Looks like a CT2 frame.. Yamaha may have updated at the end of the CT1c model run. I've seen a few undocumented changes but that's a pretty big one. .
Does it still have the sticker on the steering head? It's possible the original frame was damaged at some point and needed to be replaced. Dealer or distributor may have stamped number into new frame.
How does your exhaust mount? To the rear shock? Do you have a hole in the frame bracket under the seat right by the rear seat hinge to mount the pipe like the CT2/3 frame? If you do, it may be the original frame was replaced?
P.S. On the High Beam indicator I found a bulletin dated 12/71 that they went to the new plastic style. So your late production CT1c probably has the plastic type.
Does it still have the sticker on the steering head? It's possible the original frame was damaged at some point and needed to be replaced. Dealer or distributor may have stamped number into new frame.
How does your exhaust mount? To the rear shock? Do you have a hole in the frame bracket under the seat right by the rear seat hinge to mount the pipe like the CT2/3 frame? If you do, it may be the original frame was replaced?
P.S. On the High Beam indicator I found a bulletin dated 12/71 that they went to the new plastic style. So your late production CT1c probably has the plastic type.
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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04 Nov 2021 07:47
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- Gr8uncleal
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Replied by Gr8uncleal on topic Frame parts - are the online parts sites wrong?
Thanks Mark, great info.
Exhaust (currently Bassani, soon to be swapped to original) mounts on the shock.
No hole for an alternative mount, CT2 style, that I can see.
Sticker still present and a manufacture date of 4/71 seems, to me, quite late for a 1971 model bike.
Relevant photos attached.
Exhaust (currently Bassani, soon to be swapped to original) mounts on the shock.
No hole for an alternative mount, CT2 style, that I can see.
Sticker still present and a manufacture date of 4/71 seems, to me, quite late for a 1971 model bike.
Relevant photos attached.
The following user(s) Liked this Post: MarkT, Sneezles61
04 Nov 2021 08:23
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- MarkT
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Replied by MarkT on topic Frame parts - are the online parts sites wrong?
That was probably the last or next to last month of production. Looks like they might have changed the frame design sometime during 1971 production.
If it was a "replacement" frame from the CT2/3 it would likely have the exhaust mount hole bracket across the frame instead of the one you have. The bike I know of from decades ago that the dealer replaced the frame on the original number was stamped in the new frame but the dealer said Yamaha could not provide a replacement decal. He had some paperwork from the dealer that certified the original frame was destroyed which I guess made it legal to stamp the new frame with the same number..
If it was a "replacement" frame from the CT2/3 it would likely have the exhaust mount hole bracket across the frame instead of the one you have. The bike I know of from decades ago that the dealer replaced the frame on the original number was stamped in the new frame but the dealer said Yamaha could not provide a replacement decal. He had some paperwork from the dealer that certified the original frame was destroyed which I guess made it legal to stamp the new frame with the same number..
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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04 Nov 2021 09:07
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- Gr8uncleal
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Replied by Gr8uncleal on topic Frame parts - are the online parts sites wrong?
Thanks Mark.
So I have a part factory, part home made (AT engine cases) "mongrel"!
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One day I WILL buy a bog standard, matching numbers bike!
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I know what you mean about frame replacements. My 1976 RD400 had a replacement frame around 1978. Unfortunately, in Europe, the frame changed quite a lot between those two years (I think that the US kept the same frame, at least until the Daytona).
So I have a part factory, part home made (AT engine cases) "mongrel"!
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I know what you mean about frame replacements. My 1976 RD400 had a replacement frame around 1978. Unfortunately, in Europe, the frame changed quite a lot between those two years (I think that the US kept the same frame, at least until the Daytona).
04 Nov 2021 09:23
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- TIGER500
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Replied by TIGER500 on topic Frame parts - are the online parts sites wrong?
Hi .How's the headlight fix going .
regards keith
regards keith
05 Nov 2021 02:21
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- Gr8uncleal
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Replied by Gr8uncleal on topic Frame parts - are the online parts sites wrong?
Headlight arrived and looks in good shape.
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I'll email/message you in the next day or so.
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I'll email/message you in the next day or so.
05 Nov 2021 02:26
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