Ignition Timing, is there any tutorial or something?

[jmtourn]

Hi, i have a Suzuki gs 425, and i don't know how to adjust the ignition timing, is there any web page or some info???, What the "T" and "F" means??.

Thank you.!!!

[Anonymous]

To my knowledge, the only way to change the timing is to elongate the three holes that secure the timing plate, so you can rotate it. The "T" lined up with the timing mark means the #1 piston is at top dead center. When the "F" lines up with the timing mark, this is the point where the #1 plug will fire. With a timing light hooked up, & shining on the marks, you should be able to see the "F" mark lined up with the timing mark while idleing, as you speed up the engine, the "F" will advance a few degrees past the timing mark

[jmtourn]

Thank you, that will help.

[mark]

timing

Remember that when you change the ignition timing that it will also affect the point gap. When you've got the timing right, make sure that you reset your points to the right spec.

[earlfor]

Re: timing

I'm sorry, but you cannot change the point gap without having it change the timing. The point gap must be set first.

Earl

Remember that when you change the ignition timing that it will also affect the point gap. When you've got the timing right, make sure that you reset your points to the right spec.

[earlfor]

Re: Ignition Timing, is there any tutorial or something?

I used to have one of those. :-) Unfortunately, it was 25 years ago. :-)

so, from memory................

You will need to set the point gaps and then the timing. You will need a feeler guage, a spark plug wrench, and probably either a 19 mm or a 14 mm wrench. You will also need a continuity light. The continuity light can be just a 12 volt bulb with two wires attached to it with an alligator clip on the end of each wire.

Remove both spark plugs.

Loosen the three screws holding the breaker plate in place. Rotate the breaker plate until the screw located at 12 oclock is centered in its slot in the breakerplate. Tighten the three breakerplate screws down lightly.

With the 19 or 14 mm wrench (use the largest one you can) turn the crankshaft clockwise only with the wrench until the left pointset is at it widest gap. There is a hold down screw on the left pointset that holds it to the breaker plate. Loosen that screw slightly. BY moving the left pointset in or out reset the points gap to 14 thousandths. When the pointgap is 14 thousandths, tighten the hold down screw on the pointset.

With the 19 or 14 mm wrench, rotate the crankshaft clockwise until the right pointset is at its widest gap. Loosen the hold down screw on the
right pointset and set the gap to 14 thousandths. Retighten hold down screw when the gap is correct.

On your breaker plate at 12 oclock is the timing window. looking though that you will see a mark on the crankcase or you may have a timing plate with a timing line on it. That is the mark you will need to align to.

On your centrifugal advance counterweights, you should see marks that look like |T |F1 | on the counterweight and then 180 deg away on the other counterweight, you should see |F2 |.

The |T is top dead center for cylinder #1. |F1 is non advanced timing mark for cylinder #1. |F2 is non advanced timing mark for cylinder #2.

The last mark in the sequence of |T |F1 | is the full advance mark for the #1 cylinder. The last mark in the sequence |F2 | is the full advance mark for the #2 cylinder.

The left pointset fires the #1 cylinder. The right pointset fires the #2 cylinder.

To set the timing for the #1 cylinder....................
Rotate the crankshaft clockwise until the |F1 is aligned with the | on the engine case.

Connect a continuity light to the white wire on the left pointset. (only the white wire, it must not touch anything else) Connect the other wire of the continuity light to ground.

Loosen the three screws on the breaker plate so you can rotate it.
rotate the breaker plate until the moment the continuity light goes off.
Tighten the three hold down screws on the breaker plate. Remove continuity light. You will NOT loosen the three breaker plate hold down screws again.

Rotate the crankshaft clockwise until you see the |F2 . Stop with the | aligned with the | on the crankcase. Connect the continuity light to the black wire on the pointset. Connect the other wire of the continuity light to ground. The right pointset is held in place by a half breaker plate that moves on top of the main one you previously adjusted. You cannot at this point move the main breaker plate again. You must move the half breaker plate. Loosen the hold down screw on the half breaker plate (NOT the pointset) and rotate it until the continuity light goes out. Tighten the hold down screw on the half breaker plate. Remove continuity light. Install spark plugs and hook up plug wires. Start bike. :-)

You can check advance dynamically with a strobe timing light with the engine running if you wish. You can also set timing advance with the bike not running, but I didnt want to make this any more confusing than I had to at this point. :-)

Earl

Hi, i have a Suzuki gs 425, and i don't know how to adjust the ignition timing, is there any web page or some info???, What the "T" and "F" means??.

Thank you.!!!

[jmtourn]

THANK YOU !!!!!, Now I can do it, thank you for your help

[earlfor]

:-) :-)

Earl

THANK YOU !!!!!, Now I can do it, thank you for your help