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Makotosun
1970 HTI being a real PITA
- Kit S.
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Replied by Kit S. on topic 1970 HTI being a real PITA
Ahha! That explains why turn signal lenses for the rear have been so hard to find here. I also feel less bad about using hand signals for now. And that also explains why the FSM I have doesn't show turn signal wiring.
I need to scan that FSM one of these days I have a 1970-71 HT1, HT1B, HT1BMX FSM I got off evay back in the early 00s. It needs to be archived as I have not seen it anywhere else.
I need to scan that FSM one of these days I have a 1970-71 HT1, HT1B, HT1BMX FSM I got off evay back in the early 00s. It needs to be archived as I have not seen it anywhere else.
03 Oct 2025 05:37
#21
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- Kit S.
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Replied by Kit S. on topic 1970 HTI being a real PITA
Unrelated to electrical woes, is there any reason a JDM bike would be jetted differently than a USDM one? The service manual calls for a #85 main jet, my bike had a #75 in it that looks to be original and ran like junk the moment I put in the "proper" #85. And that's with a high flow K&N that my uncle put on way back when.
Right now it's super happy with a #80 for the pre-mix I am running. I am only at like 1200ft above sea level here, so no crazy altitude or anything.
Right now it's super happy with a #80 for the pre-mix I am running. I am only at like 1200ft above sea level here, so no crazy altitude or anything.
03 Oct 2025 07:31
#22
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- Gr8uncleal
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Replied by Gr8uncleal on topic 1970 HTI being a real PITA
I view carburation as one of the dark arts, so will leave for others to answer. However, I did notice that the HT1 uses the jet setter, so make sure that the small 'O' ring (number 6 on the diagram) is in tip top order - new ones are still available from Yamaha.
Yamaha HT1B 1970 USA CARBURETOR - buy original CARBURETOR spares online
Yamaha HT1B 1970 USA CARBURETOR - buy original CARBURETOR spares online
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03 Oct 2025 08:18
#23
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- MarkT
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Replied by MarkT on topic 1970 HTI being a real PITA
Turn signals were not required in the US on motorcycles until 1973.
If you have them on an earlier bike, they need to work. But you technically don't need to have them.
If you have them on an earlier bike, they need to work. But you technically don't need to have them.
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 Oct 2025 08:40
#24
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- Gr8uncleal
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Replied by Gr8uncleal on topic 1970 HTI being a real PITA
Oh, and good luck finding a job.
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It really is a PITA struggling for dosh.
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03 Oct 2025 10:58
#25
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- Kit S.
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Replied by Kit S. on topic 1970 HTI being a real PITA
Thanks! Yeah, job hunting is gonna suck. But it's nice finally being well enough to do so!
I remembered the weird moped store I ordered cables from for another project (andual throttle body, front mount intercooled, supercharged miata...) called treatland.tv
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Turns out they have some odd ball sized headlights for vintage mopeds, one has a removable lense that takes a PD15 bulb and the lense is 4.5" diameter, the headlight is 5". That may fit perfect, and if not, a small 3D printed trim ring should do the job. I ordered that and will report back.
Also, how do I post photos? BB code isn't working and I cannot attach anything,
I remembered the weird moped store I ordered cables from for another project (andual throttle body, front mount intercooled, supercharged miata...) called treatland.tv
.
Turns out they have some odd ball sized headlights for vintage mopeds, one has a removable lense that takes a PD15 bulb and the lense is 4.5" diameter, the headlight is 5". That may fit perfect, and if not, a small 3D printed trim ring should do the job. I ordered that and will report back.
Also, how do I post photos? BB code isn't working and I cannot attach anything,
03 Oct 2025 12:49
#26
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