Topic: 1966 Suzuki S32-2 timing

[MoMo]

I have been searching the net for hours in an attempt to find the timing specs for my recently acquired S32.  Right now the left set of points opens 3.2mm btdc and the right opens 4.5.  If anyone has the correct specs I sure would appreciate the info...Larry

[MoMo]

I have been searching the net for hours in an attempt to find the timing specs for my recently acquired S32.  Right now the left set of points opens 3.2mm btdc and the right opens 4.5.  If anyone has the correct specs I sure would appreciate the info...Larry

Found the specs in degrees for the s32,   25btdc.  Since my dial indicator is metric I had to convert the 25* to mm.   I divided 360 into 25, which gave .07, multiplied .07 times the stroke(45mm)-that yielded 3.1 .  Timing is now set.   Bike runs real well except for the leaky carbs, plus the brand new expensive petcock does not shut off so I found a gas puddle on the shop floor the other days...Larry

[MoMo]

When was the last time you had to use one of these?

[ekpent]

When was the last time you had to use one of these?

I have been putting some two strokes in the barn and need to learn that technique to do them correctly.Been looking for the correct tools to add to the stash when I know what I need ??  Makes my head hurt 

[MoMo]

Only need a dial indicator and a good multimeter  to time a vintage two stroke..Larry

[trueblue]

Larry, I just double checked your working out and I think your timing is a little retarded.  You should only be working with 180 deg rather than 360, because you are only working with the up stroke of the piston, that is if I'm thinking correctly, it is getting rather late here so excuse me if I don't make a lot of sense.  I would have worked it out like this.  You have a 45mm stroke, divide that by 180, then multiply by 25 which gives 6.25mm.  If you are working with 360 deg you need to double the stroke length in the equation because the piston moves through its travel twice in 360 deg .

[MoMo]

Larry, I just double checked your working out and I think your timing is a little retarded.  You should only be working with 180 deg rather than 360, because you are only working with the up stroke of the piston, that is if I'm thinking correctly, it is getting rather late here so excuse me if I don't make a lot of sense.  I would have worked it out like this.  You have a 45mm stroke, divide that by 180, then multiply by 25 which gives 6.25mm.  If you are working with 360 deg you need to double the stroke length in the equation because the piston moves through its travel twice in 360 deg .

tb,  you are right that the stroke is doubled.  However, in my past experience working on two strokes I have never seen timing that advanced, usually somewhere between 2 to 3mm btdc was the norm.  The bike runs well and plugs look good so I'll leave the timing as is and do more research. Maybe try to make or acquire a degree wheel. Thanks for the input...Larry

[trueblue]

25 deg BTDC is a bloody long way advanced, so is 6.25mm, I'll agree with that but I have to admit I haven't had a lot of experience working on the early two strokes.  A cheap option for a degree wheel is a 360 deg protractor .  The only problem with converting from a degree to a distance is as the piston approaches TDC it slows down and covers less distance per degree and for a few degrees at the top of the stroke it doesn't move at all.  I can't remember the equation to work this out correctly.  If the manufacturer specifies a distance they would have allowed for this variance in piston travel.   

[Stev-o]

When was the last time you had to use one of these?

Never.   Do I need one for my RD350? I like the one you have.

[MoMo]

When was the last time you had to use one of these?

Never.   Do I need one for my RD350? I like the one you have.

Stev-o,  you will need a dial indicator to time the RD.  I have had that one since the early 70's-  good chance a used one would be available on Feebay.   I have several others as some of the two strokes needed a longer stem because the distance from the cylinder head to piston was different...Larry