Set timing on Yamaha AT-1

In this video I set the points and timing on the 1971 Yamaha AT-1 Enduro. I use a buzz box but you can use a test light if you want to. We do not use a timing light for this proceedure. However you can if you want to. But this video I use a buzz box and a dial indicator.

[tom]

Thanks Dale. I was struggling with my 75 DT125. I followed this video, step by step and we have spark! Never would have considered disabling the advance. Great video

[philfritsch]

Best video and explaination of how to set points timing…thks!

[retromechanicalengineer]

Great tutorial Dale. That's a very sweet running bike, starts readily on the dynastarter.
Best wishes, Dean.

[rondasellers]

Just restored a 1974 DT125 I bought in a box. This video made it now! Thanks a bunch!

[DH-mflv]

You are the man! I bought a restored 69 AT1 and I can't get it to start. There is spark and fuel is getting into the cylinder. It backfired a time or 2. I removed the carb to verify no clogged jets too. New plug and fresh nonethanol 90 octane gasoline. I guess the only thing left to check is the timing and points gap. Owners manual offers no assistance. Thank you for this video.

[frankdillon]

amazing engineering for the days so much that could move or break but seldom ever does.

[frankdillon]

analog multi-meter works good if you don't have a light/buzz box.( i made a DIy buzz box bought a 9v buzzer off fleabay and a metal altoid cough crop box for sound, 2 wires and alligator clips).

[AlexanderLanderman]

Hey Dale! Wonderful video!
I'm wondering have you had any issues with the e-start on your 125? I have a 1974 DT125 and the e-start went out. Curious if you've messed with them at all.
Thanks!

[tayloratwell]

Great instructional video Dale. I was looking at my manual for our 1972 AT1 125, it appears that almost all these models are 1.8 or 2.0 mm prior to TDC. My boys and I will be doing this soon, however we don't have a buzz box. But I am thinking my Fluke multi meter will work fine on continuity / tone to complete the process? I was wondering what kind of spark plug adapter you have for your Dial indicator, let me know the part # when you get time. Thanks!

[jeschreindl]

I have my grandfathers 1969 AT1e and have no spark. The coil is good and the condenser seems to be ok from the little bit of testing i can so with my mutimeter. I cleaned and adjusted the points but they seem to be sparking a fair amount. Any thoughts on what to be going after. The bike ran great when he parked is almost 20 years ago.

[frankdillon]

just noticed the cool twist off fuel petcock.

[mowman]

I had two Yamaha Enduros, I never knew any of them had electric start.

[robertrodriguez]

Dale are you in the States?
Do you do paid work, like on a Suzuki Ts400?

[davidfiore]

Question, what is the formal name for the buzz box, and what brand and settings do you use ? A pic would be great f you possibly could please?!

[DH-mflv]

What voltage is the buzz box? 12 volts? If so, can I use a meter instead? (set the dial to DC volts)?

[frankdillon]

what can i say! 3:02AM Sunday! my favorite subject electric black magic!

[SMALLMOTORCYCLEADVENTURES]

I have never heard you mention timing and modern fuels. Here in Tucson I really only have access to 91 octane ethanol fuel. Should I be retarding the timing on my vintage 2 strokes to account for this? I think the RD400 manual said 2.3 and the CS5 is 1.8. Thanks.

[nahumg]

do you know if this procedure applies for a Yamaha 125 1976 DT ?

[frankdillon]

points spitting sparks is that a weak condenser?

[dude]

Hello, I’m wondering if you could help me out. I have one of these. I’m not sure what I’m doing.