Y80 Timing - Newbie's 2nd of 1K questions

[rcb7761]

I think I need help or maybe I'm doing it correctly.
1. Cleaned and set the points at 0.012" ensuring I was on the top of the lobe when setting
2. Made an assumption that the point set with the red wire is for #1 and #1 is top piston and connected buzzier (disconnected all wiring on the point set).
3. Inserted my dial indicator and found TDC, at this point buzzier is not going off.
4. Turned crank ccw to 0.20" and adjusted advance plate until buzzer sounds off. Tighten plates and had to read adjust.
5. Put a degree wheel on, and ensured point and tdc are set.
6. Starting at TDC turning crank cw no buzzier until I reach 30 deg atdc on the wheel and buzzier sounds and stayed on until I reached 270 deg still turning cw. At 270 or (90 deg btdc) buzzier stops. Timing wheel is labeled in a cw direction.
Before I go to #2 piston thought I'd get the experts advice.

Tom was trying to give me instructions on using a timing wheel instead of using a dial indicator (except for finding TDC) and rotating backwards 0.20" and setting advance plate until buzzer sounds off, but I didn't understand, something about 220 deg I think I've read all the post on here and the owners manual plus RPM's instructions, very confusing with points setting correctly.
thanks in advance,
Rodney

[Tom Cronk]

Timing

Rodney
Give me a call tomorrow.
Tom

[pav225]

Y80s and Rochelle, IL

Rodney,
Tom is a motor (and boat) master, so I'm sure he can help you out.

Timing is one of the most difficult things to learn how to do, especially over the phone. Any chance you are going to a race soon? Hopefully someone can show you in person. After you time a motor once, it becomes very easy to do yourself.

We have a race in Rochelle, IL in 2 weeks. I know its a long drive, but its a good race site, good/fun competition and hopefully, plenty of test time.

If you show up, I'll time your motor, and pay your entry fee for 20ssH.

- Mike

[Big Don]

From Rick Montoya's web site

www.yamatoracing.net


Setting the point gap and the ignition timing on a Yamato 80 & 102

1) Remove starter pulley
2) Remove spark plugs
3) Rotate crank till point follower is on the tallest part of the point cam. On the 102 it is where the cam key is.
4) Set point gap on both points to 0.012”-0.016”, I prefer gapping to 0.012”.
5) Install dial indicator in cylinder #1. Rotate engine to top dead center. Zero dial indicator. Rotate engine backwards (counter clockwise) till points close (recommend using a buzz box). Note how many thousands on the dial indicator.
6) Install dial indicator in cylinder #2. Rotate engine to TDC. Zero dial indicator. Rotate engine backwards till points close. Note how many thousands on the dial indicator.
7) Take cylinder with the highest reading and install the dial indicator in that cylinder. Rotate the engine to TDC. Zero the dial indicator. Rotate the engine backwards to desired setting. Factory recommended specs for the 80 is .180”-.200” BTDC, for the 102 is .200”-.250” BTDC.
8) Rotate magneto to the position where the points are just opening or closing (recommend using the buzz box). Rotating the engine a few thousands above and below your desired timing setting should open and close the points.
9) Set magneto stop bolt and secure magneto.
10) Install dial indicator in the other cylinder. Rotate engine to TDC. Zero dial indicator. Rotate engine backwards to desired timing setting. Open points slightly till points are opening and closing a few thousands before and after your desired timing setting.
11) Remove timing equipment. Reassemble engine. Check spark quality. Install spark plugs.

[rcb7761]

Rodney
Give me a call tomorrow.
Tom

Again Tom comes to the rescue and problems cleared up. I thought Tom was using a degree wheel like we used on race car engines and Tom was referring to a dial indicator that's display is in degrees and not like my cheap one that's in 0.001"
thanks again Tom,
Rodney

[rcb7761]

Rodney,
Tom is a motor (and boat) master, so I'm sure he can help you out.

Timing is one of the most difficult things to learn how to do, especially over the phone. Any chance you are going to a race soon? Hopefully someone can show you in person. After you time a motor once, it becomes very easy to do yourself.

We have a race in Rochelle, IL in 2 weeks. I know its a long drive, but its a good race site, good/fun competition and hopefully, plenty of test time.

If you show up, I'll time your motor, and pay your entry fee for 20ssH.

- Mike

Mike,
Can't believe the kindness of you and others in this sport. This just confirms my decision to enter this sport and get my Grandson involved next year. My interest at first was for him and then after talking with you guys, I decided to try myself at 65. Just takes a while to get setup while your still working and have a limited budget and time.
Thanks again for the generious offer and look forward to meeting you one day, maybe a little closer until I retire. If your into golf and ever get tickets to the Masters, don't worry about a place to stay, I have plenty of room and very close to the course.
If your an example of a typical racer, I know I have chosen the right sport.
Thanks again,
Rodney

[rcb7761]

www.yamatoracing.net


Setting the point gap and the ignition timing on a Yamato 80 & 102

1) Remove starter pulley
2) Remove spark plugs
3) Rotate crank till point follower is on the tallest part of the point cam. On the 102 it is where the cam key is.
4) Set point gap on both points to 0.012”-0.016”, I prefer gapping to 0.012”.
5) Install dial indicator in cylinder #1. Rotate engine to top dead center. Zero dial indicator. Rotate engine backwards (counter clockwise) till points close (recommend using a buzz box). Note how many thousands on the dial indicator.
6) Install dial indicator in cylinder #2. Rotate engine to TDC. Zero dial indicator. Rotate engine backwards till points close. Note how many thousands on the dial indicator.
7) Take cylinder with the highest reading and install the dial indicator in that cylinder. Rotate the engine to TDC. Zero the dial indicator. Rotate the engine backwards to desired setting. Factory recommended specs for the 80 is .180”-.200” BTDC, for the 102 is .200”-.250” BTDC.
8) Rotate magneto to the position where the points are just opening or closing (recommend using the buzz box). Rotating the engine a few thousands above and below your desired timing setting should open and close the points.
9) Set magneto stop bolt and secure magneto.
10) Install dial indicator in the other cylinder. Rotate engine to TDC. Zero dial indicator. Rotate engine backwards to desired timing setting. Open points slightly till points are opening and closing a few thousands before and after your desired timing setting.
11) Remove timing equipment. Reassemble engine. Check spark quality. Install spark plugs.

Big Don,
Issue cleared up and hoping to fire her off today for the first time and then start a few changes to the steering on my giles hydro,
Thanks again,
Rodney