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TOPIC: ‘71 rt1 mx kill switch

‘71 rt1 mx kill switch 10 Jun 2018 16:37 #1

  • Kebmo123
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Been looking for the correct oem kill switch for the rt1 mx. Deet found me a picture of a “universal” switch. Looks exactly like what I remember, with the red button and black sheathing on the wire. There is also a so called “original” on $bay. Everything looks right, just a black button. Anybody have a clear picture of the oem kill switch complete? KT

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‘71 rt1 mx kill switch 10 Jun 2018 19:21 #2

  • Makotosun
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I don't have the picture you are looking for, but recently purchased a couple of these off of Amazon.



www.amazon.com/gp/product/B077F944DG/ref...01_s00?ie=UTF8&psc=1

Look right a function perfectly. I used it on my Hodaka Wombat - I ended up extending the wire just a bit to get to where I needed it, but otherwise a very nice product.
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No Good Story ever started with a Salad . . .

‘71 rt1 mx kill switch 10 Jun 2018 19:22 #3

  • MarkT
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In 1971 I'd be surprised if it had one from Yamaha.... The early MX bikes didn't come with any kill switch. I don't know for sure though on the RT.

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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

‘71 rt1 mx kill switch 10 Jun 2018 20:25 #4

  • asco
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I am really happy with the kill switch that I recently connected on my DT1.

I looked - I paid $15.00 for it.

It is a two position, spring loaded, rubber covered, two wires, needs 18 inches of grey sheeting.

EDIT: EBAY: 2 WIRE KILL SWITCH ON OFF STOP BUTTON $25.00.

Cut off both bullet connectors. Stagger cut the thickness of black electrical tape or 1 inch. Solder 18" of black and red wire (18 gauge) Black goes to the frame Red goes through the bullet connector on the coil wire and into the black wire of the stator. The grey sheeting covers the connections. Panic situation smack that button one time and forget it - the bike is dead..



a
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YAMA-LAND RESTORATIONS
818-521-2109
MINIBIKESERVICE@AOL.COM CUSTOM MINIBIKE (RALPH) 2002 110cc XR PAX RACING 1971 125cc AT1-C (DOROTHEA) 1971 175cc CT1-C (BRANDY) 1970 250cc DT1-C (MONICA) 1973 100cc Hodaka Combat Rat (ABBY NORMAL) 1969 125cc AT1-M MX (DELILAH)
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‘71 rt1 mx kill switch 10 Jun 2018 21:01 #5

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Thanks Mark and Mako. That first picture (with the red button) is exactly what I just bought, just in case The ‘71 rt-1 mx didn’t come with one. Not sure how you cold shut down, quickly anyway, without one. KT

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‘71 rt1 mx kill switch 10 Jun 2018 21:18 #6

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Here's a used one that looks like the ones they used on the early MX and YZ bikes... I still think a factory kill button was later than 71 though...

Before that, Yamaha said to pop the clutch in gear to kill the engine... not kidding!



Maybe the bigger bikes had a kill switch sooner... I think the 125 got one in 73 or 74.

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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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‘71 rt1 mx kill switch 10 Jun 2018 21:54 #7

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Imagine cruising downhill somewhere hauling freight, and not having the kill switch. I know riders used what they had (nothing) at every race in every situation, also imagine catching your throttle cable on a branch or having a chunk of something keeping the throttle valve froclosing- like a Nantucket sleigh ride on knobbies!

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‘71 rt1 mx kill switch 10 Jun 2018 22:44 #8

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ASCO- can you provide a little more detail on the two wire kill switch? I looked on eBay and cannot find what you have shown. Looks like a quality little set up. Thanks for any further information you have. Maybe the eBay auction number? KT

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‘71 rt1 mx kill switch 11 Jun 2018 06:09 #9

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My comments on it possibly not having a kill switch was based on the statement that you were looking for the "correct OEM switch". If it did have one, "correct" would have been a one-wire version.

Not having a kill switch is a really bad idea in my opinion if you are going to ride at all... and the two-wire version is the best type to use. It doesn't happen often but the one-wire type can fail to get a good solid ground through the handlebar and steering head bearings... rare that the ground will be so bad that it won't kill the engine. Not so rare that with a bad ground you might get zapped a little if touching the bars while pressing the kill button.

Honda CR type is one of the most reliable two-wire types available... probably what Ascot uses?

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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

‘71 rt1 mx kill switch 11 Jun 2018 10:55 #10

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Gotcha Mark. Does seem like a good system and I do plan to ride it, a little anyway. Thanks for the lead. Already bought one. KT

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