Timing light for kz750

Hey everyone,

I just slightly adjusted the timing on my kz750f1(dyna-S). I have the F mark lined up perfectly but when I run up to 3800rpm its not between the two marks. What does this mean? Is there adjustments I can make?

Thanks for the help.

Some timing lights are effected by the wasted spark, double firing of the Bikes Ignition system. What are you finding. Does you light have an advance feature, so you can set it lets say 40 degrees then rev and see it line to the "T" mark. This would indicate 40 degrees Total on the advance curve, which may start at 10 before TDC.

Hey Motorhead, No I don't have an advance feature on the timing light. I just got a basic timing light. Should I get the one with an advance feature? I just went out an bought a basic one to make sure the timing was good. The F didn't line up perfectly so I made a little adjustment. Everything seems to run fine, but in the manual I think it says "at 3800rpm, the mark should line up between the two lines". My bike goes past the two lines. Just wondering if that good, bad, or something is out.

Well you don't have to use a light with the advance feature, its just easier. Best to use a degree wheel, make a mark at max advance of what your manual states is the top of the curve. Like 45 probably. Then see where it lands when revved. A little less can be better than more, but thats per motor seems like, and fuels etc play into it alot. If its running fine with the "F" mark lined up at Idle it is probably OK. But Total advance can cause some major engine damage so it is worth checking correctly. There should be a Bump stop for the full advance, some use a little rubber cushion to limit the total, or if metal to metal, they can be tweaked a bit. Or I suppose you could add to the area to close up the curve.
I gave mine a small tweak, and am still at the 10 initial at Idle, but shortened the total to about 40 or so. But my liquid cooled Concours I did just the opposite nearly. Se the timing up further +4 degrees all through, Idle up thru total. Now its 14 at Idle and 44 at Max advance.

bobski911 wrote: Hey everyone,

I just slightly adjusted the timing on my kz750f1(dyna-S). I have the F mark lined up perfectly but when I run up to 3800rpm its not between the two marks. What does this mean? Is there adjustments I can make?

Thanks for the help.

still using the mechanical advancer assembly?

Yes, still using the mechanical advance.

Motor Head wrote: Best to use a degree wheel, make a mark at max advance of what your manual states is the top of the curve. Like 45 probably. Then see where it lands when revved. A little less can be better than more, but thats per motor seems like, and fuels etc play into it alot. If its running fine with the "F" mark lined up at Idle it is probably OK. But Total advance can cause some major engine damage so it is worth checking correctly.

Thanks Motor head,

I'm not too familiar with how this timing works. My manual says the top of the curve is 38.5-41.5. I'm not sure what that means. I just realized that I set the timing to F mark where I have my idle at, which is 12-1300rpm. The book say idle should be at about 1100. Do you think that because I set the F mark up at 12-1300rpm, this is why I go past the two line markers?
You have also mentioned gas can be a factor, I used premium with a little octane boost. You think?

a big timing wheel will give you much more accuracy.

thing is you'll also need a TDC tool to set it, take off alternator cover, rotor bolt, etc.

but if you are not lazy its definitely worth the effort.

just be careful not to bend valves with the the TDC tool!

Whoa whoa there turboguzzi,

I like the sounds of this, can you lead me to more info on the tools/parts, or procedure.

Thanks

bobski911 wrote: Yes, still using the mechanical advance.

That's what it screwed up on mine. The advance range narrows as they wear so you get either timing correct at idle or high RPM, can't get both right. It's because it does not give correct range of advance.

bountyhunter wrote:

bobski911 wrote: Yes, still using the mechanical advance.

That's what it screwed up on mine. The advance range narrows as they wear so you get either timing correct at idle or high RPM, can't get both right. It's because it does not give correct range of advance.

Thanks bountyhunter. What do you suggest I do?

bobski911 wrote:

bountyhunter wrote:

bobski911 wrote: Yes, still using the mechanical advance.

That's what it screwed up on mine. The advance range narrows as they wear so you get either timing correct at idle or high RPM, can't get both right. It's because it does not give correct range of advance.

Thanks bountyhunter. What do you suggest I do?

I had to replace the springs on mine to get it to work.

Check yours: if the "weights" have play in them, the thing is not going to work right.