'82 GS300L Restore & Timing Adjustment - Complete Noob

[hjacobmiller]

OK then I have this one:

http://www.ebay.com/itm/Suzuki-300-1...#ht_500wt_1180.

Does that mean the Dyna won't work for me? Please tell me it does because that looks so much simpler and more reliable than what is on there... And a heck of a lot cheaper than that new OEM ignitor box.

Nope but good effort.


There are two types of rotors on the end of the crank

One is just a solid piece that is stuck to the crank and doesn't move at all. That one is not a mechanical advance and the ignitor does the advancing.

The mechanical advance has a special rotor attached that can rotate forward a bit.
It has a few small weights in it that fly out when the engine rev's up. Thats what advances the ignition timing.

Looks like this http://www.ebay.ca/itm/SUZUKI-GS-450...item5d3292fd4c


The manual and parts fiche show's both types but its depending on the year.

[Mekanix]

Wrong part, Look to the left of the one on here

http://www.ebay.ca/itm/SUZUKI-GS-450-OEM-Pickup-Coils-24B91M-/400280452428?pt=Motorcycles_Parts_Accessories&hash=item5d3292fd4c

See the part that would go on the crank, what does yours look like?

I have a feeling that it is a mechanical advance because of where the pickups are pointing.

The mechanical ones are pointing in and you can see a little bit of bare metal there.

take a look at page 107 in the manual. Is it exactly like that ?

[hjacobmiller]

What I have on the end of the crank is just a little knob sticking out perpendicular to the crank. It rotates as the crank turns between the two pickups on this part:

http://www.ebay.com/itm/Suzuki-300-1982-GS-pick-up-coil-pulse-generator-/320909663218?pt=Motorcycles_Parts_Accessories&hash=item4ab7b4dbf2&vxp=mtr#ht_500wt_1180

I'd take a picture but I'm not at home right now. Here is sort of what it is:



Sorry about the rough drawing ha ha ha.

Wrong part, Look to the left of the one on here

http://www.ebay.ca/itm/SUZUKI-GS-450-OEM-Pickup-Coils-24B91M-/400280452428?pt=Motorcycles_Parts_Accessories&hash=item5d3292fd4c

See the part that would go on the crank, what does yours look like?

I have a feeling that it is a mechanical advance because of where the pickups are pointing.

The mechanical ones are pointing in and you can see a little bit of bare metal there.

take a look at page 107 in the manual. Is it exactly like that ?

[Mekanix]

that's actually pretty good

Do you know if the knob turns forward a bit while the crank stays still ?

Alot of the mechanical advance part with the springs and weights are hidden behind the pickup plate.


This is a NON mechanical advance.

http://www.ebay.com/itm/83-88-SUZUKI-GS450EZ2-GS450L-GS450T-GS450E-IGNITION-UNIT-IGNITER-32900-44420-/221000172037?pt=Motorcycles_Parts_Accessories&hash=item3374a30205&vxp=mtr

Somewhere between 1982 and 83 they changed from mechanical to non mechanical. So it depends on the month it was manufactured. That decided which one it got.

[hjacobmiller]

Ha ha thanks if only if I was as good at fixing motorcycles as I am at using Microsoft Paint!

It doesn't move. When I turn the crank like I would be turning to adjust the valves it moves with it. As at a matter of fact I have to turn the crank to turn it so the pick ups will come out.

I definitely don't have one of the advancers that has the different points on it like on page 9 of this : http://members.dslextreme.com/users/...c_ignition.pdf

Does the Dyna you suggested work with a non-mechanical advance?

[Mekanix]

Are you sure you don't have that ? Its well hidden behind the plate.

If you turn the nut on the end the crank will turn because its fixed to it but the next part down with the two lobes on it should float a bit and rotate a bit while the crank stays still.

That example was for switching from points to a dyna.

Its a "dumb" ignitor like the stock one. It doesn't have anything built into it to tell it to advance. It just takes what you give it, that's why you have the mechanical advancer. It won't work with a non mechanical advance but you could just replace it with a mechanical advance.

[hjacobmiller]

I'll take a look tomorrow but I don't think so. I could be wrong. What are the options if it is not a mechanical advance?

[Mekanix]

go with any newer than 83 ignitor/pickup/rotor on a 450 or 500.

The rotors are interchangeable between mechanical and non. They attach to the crank the same way.

[hjacobmiller]

So just put a mechanical advance rotor on the crank? And then get the dyna?

I'll check this afternoon and see whether or not it is mechanical advance. It may be.

[Mekanix]

that's the idea. Best to call dyna and ask them questions about the plate and yours just to see if the bolt spacing is the same and the overall diameter is the same.

[hjacobmiller]

Here is what I've got:






This is a non-mechanical advance right?

It looks like the 450 has the same crankshaft #12220-11901 but not the same balancer. So a 450 mechanical advance rotor (#33120-44120?) should fit that crank I'm assuming. The listed bolts through the center aren't the same but I don't see any reason why I couldn't just use mine. But if crank is the same I'd bet that the bolt is the same too, at least the same threads. Unless the bolt goes into the balancer instead of the crank. I don't know which one the bolt goes into - embarrassing I know. Sorry!

It looks like the 650 used the same mechanical advance as the 450 (#33120-44120) used and there are a couple of ones up on ebay right now for cheap.

The last thing I would need to check is to see if the Dyna would fit the existing holes to mount. If so, my thought is to use 650 (and 450) advance and then get the Dyna.

Oh lord what a hodgepodge bike this is going to be...!

Oh, and by the way, thanks! I can't believe how helpful! I would be completely clueless without all of the directions!

that's the idea. Best to call dyna and ask them questions about the plate and yours just to see if the bolt spacing is the same and the overall diameter is the same.

[pete]

Sorry, out of the loop on this one again...

Mekanix is onto it I think in that '83 and later 450's and at least the early GS500's share the same ignitor, and going by the photo of your timing cover there the signal generator plate is probably a direct swap as well.

So providing the advance curves are the same everything should be a straight swap...

I have a Dynatek on my 450 (mechanical advance though) and I love it... but in your case you should be able to get away with other 450/500 bits I would think...

[hjacobmiller]

It looks like the GS250T used the mechanical advance, which I'm showing as not the same # that the 1982 450 uses. Can't seem to find advancer #33120-11410 used anywhere.

[Mekanix]

The dyna doesn't work with the non mechanical advance. But you could put the advance rotor in.

That one is definitely not a mechanical advance and is like all the later engines looking at your picture.
Looking a it closser, your engine looks exactly like mine for the pickup plate location and size.

So any 450 or 500 ignitor, rotor and pickups 83 and newer could be swapped onto it by the looks of it.

Hmm, I think i might do the swap myself :P

[hjacobmiller]

The only thing I'm worried about is whether the advance will fit. The GS250T (british version of mine) and the GS450 have different part #'s for the advance and I can't find one anywhere for the GS250t.

The dyna doesn't work with the non mechanical advance. But you could put the advance rotor in.

That one is definitely not a mechanical advance and is like all the later engines looking at your picture.
Looking a it closser, your engine looks exactly like mine for the pickup plate location and size.

So any 450 or 500 ignitor, rotor and pickups 83 and newer could be swapped onto it by the looks of it.

Hmm, I think i might do the swap myself :P