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TOPIC: 1976 DT175C Flywheel & Timing

1976 DT175C Flywheel & Timing 09 Feb 2019 20:04 #11

  • MarkT
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For your snap ring maybe you could find a Spirolox?

Something like this if the dimensions are right

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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

1976 DT175C Flywheel & Timing 10 Feb 2019 07:40 #12

  • Midlife Motor
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I recommend going with MarkT's suggestion and leaving it in the full advance position if possible. From what I understand that mechanism is only for assisting during starts in cold weather. I live in Az so it's not an issue, but I share your frustration in finding ignition parts for the 76 DT175. My flywheel grenaded two years ago and my wife was able to find a NOS one but it was 300 dollars. I was working a detail with lots of OT so I sprung for the NOS one. Looking at the photo that advance lever arm is broken.

The other caution of buying used flywheels is the cam surface can be quite rusted on some.

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It's better to remain silent and be considered a fool than to speak and remove all doubt.

1976 DT175C Flywheel & Timing 10 Feb 2019 15:47 #13

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MarkT wrote:

DEET wrote: The advancer arm tip that engages the cam sleeve looks like it is broken off.


I just noticed DEET responded with a perfect one sentence explanation while I was taking pictures and writing my "novel" saying the same thing... Sometimes I go into way more detail than needed. :Ugh


I have been a teacher for the last 45 years, first as a private violin and viola instructor, and then as a public school teacher. I have complimented DEET on his teaching style before, and I'll compliment you now, too. THERE IS NEVER ANY DANGER IN OVER TEACHING, Mark! Some people get it through words, some people get it through pictures, and some people need both to understand the concept. You are one hellovan asset to this site, and I have met a number of certified teachers with years and years of experience in the schools where I have worked that could take a lesson or six from you and DEET, both, and still not be the fine teachers you guys are. Both of you are indefatigable! Let DEET write the Gettysburg Address, and you keep writing the manual. We need both!
Carry on.
The following user(s) Liked this Post: DEET, MarkT, 2fishkev, Swoop56, yamahahaha, Midlife Motor, Snglsmkr, Gr8uncleal

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1976 DT175C Flywheel & Timing 10 Feb 2019 19:50 #14

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My posting style has evolved.
On the other site, I used a little more "Tom Foolery" in my posts...

Now....?

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Yamaha@nc.rr.com

Where the Yamaha Enduro is still a current model...
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1976 DT175C Flywheel & Timing 15 Feb 2019 18:55 #15

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Well, thanks to MarkT, I was able to source a good mech advancer from Ebay, I now have it installed and am moving on to the next thing. I have a question (2) questions actually.
1. What does the timing tab do?
2. Why is there a sleeve on the advancer? You can barely see it in the first pic with a small arrow pointed to it. I have the tab painted Red in the 2nd picture. Is it for using a timing strobe/ If so how does one use a timing light on these 2 strokes?

4th Picture is the piece installed..Now I have to see if my spare stator will work after I clean it up and make sure its insulated well..




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1976 DT175C Now Running!
1975 DT100B Kid Trainer
1974 DT250A 3rd in Que
1992 FJ1200
Primary Home Long Grove, IL
Secondary Home UP of MI

1976 DT175C Flywheel & Timing 15 Feb 2019 20:02 #16

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The sleeve is probably just a damper to keep the arm from hitting the stop metal-to-metal

Look on the outside of your flywheel... large oval holes... one of them will have a small "chisel mark" on the edge of the hole that should line up with the timing tab when the points just start to open.

The best thing to do is use the dial indicator to get the piston the right distance BTDC and then, if necessary, tweak the timing tab to line up with the "chisel mark" in the flywheel. That way you can set the timing pretty darn close without the dial indicator if you ever need to.

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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

1976 DT175C Flywheel & Timing 15 Feb 2019 20:06 #17

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Here is a picture of the "chisel mark" that lines up with the timing tab.




,
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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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