Hi! has anyone played with ignition timing (woodruff keys etc) and if yes what are your results?
is it worth or only for racing?
thanks!

You need to make sure that you know how to check your plug reading . Advance it and look at the burn back , it may help your set up . I am at +2deg

thanks for the responce neal!

i was thinking to check the 1 and 2 degree woodruff from tyga.

If i plugchop will i see lean or rich mixture on the plugs? thats the way i'll decide what is best?

thanks!

I use the HRC PGM and the F3 flywheel. I'm 2deg advanced over stock but retard the top cylinder 0.5deg so thats only 1.5deg over stock. Its all very dependent on engine tune though.
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If I have to take the carbs off once more...

StephenRC45 wrote:I use the HRC PGM and the F3 flywheel. I'm 2deg advanced over stock but retard the top cylinder 0.5deg so thats only 1.5deg over stock. Its all very dependent on engine tune though.

Hi Stephen,

Given that it's very dependent on engine tune, which makes sense, what state of tune/ancilliaries is that motor running?

How does one retard the cylinders indivdiually on an NSR? Is that a physical modification you've done, or is it facilitated via your HRC PGM? Are NSRs timed slightly differently per cylinder from the factory?

Finally, given whatever the availability of the HRC PGM is (I don't know what it is, but old HRC parts seem to get rare quick enough), what's your opinion on the Zeeltronics/Ignitech units? Worth a play if you've got the coin for dyno time (given that the units themselves are appropriately priced).


NSR-Lover,

Detonation is a pretty effective killer on 2 stroke motors, so it's worth making sure every other part is tip top before heading down the track of revising your ignition curves.

If i plugchop will i see lean or rich mixture on the plugs? thats the way i'll decide what is best?

Anybody have a comment on that for the man?

With the use of the HRC PGM and HRC flywheel you can alter the ignition for each cylinder as well as the overall ignition timing via the HRC stater back plate.

My motor uses quite a low compression, I gain midrange power by having an advanced ignition set up that then retards just after peak power to give over-rev. The lower compression also helps the peak rev ceiling.

I've used the Zeeltronics/Ignitech units on RGV's but never on an NSR. To the most point the stock PGM seems to cope with most engine modification well and doesn't suffer with the hole/dip the RGV's tend to have in the midrange.
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If I have to take the carbs off once more...

You should have split timing between the cylinders on a twin(V or inline). The dip is from the PV, never found any measureable increase in HP from advancing the ignition (plenty of other things though). If you have dips in the curve you might like to try a can of my new improved formula gel 'No More Dips'




Sorry for the DIN correction factor SAE is about 2HP lower

Hi Lover ,

look for Gordon Jennings explanation on plugs .
Look at the bent metal part of the plug and it will start to burn clean at the tip ( burn back ) . Advance it 1 degree at a time until it burns back to 50% and you are safe IMO .

As another guy says - Tune it like Paris Hilton --- Rich and Retarded

2institute - what bike is that graph for ?
I too would like to install a ignitech or zeeltronic unit , it is all rocket science to me at this moment .

thanks for the tips guys!

i will start messing with the bike in a few days first things to do a comp test and a multimeter test and then
start jetting...
I found lots of infos on the net about jetting-plug chop etc but plug reading seems to differ from people, others look
down etc... the best is to show you the plugs when ill chopp it so thats what im gona do!

Neal wrote:Hi Lover ,

look for Gordon Jennings explanation on plugs .
Look at the bent metal part of the plug and it will start to burn clean at the tip ( burn back ) . Advance it 1 degree at a time until it burns back to 50% and you are safe IMO .

As another guy says - Tune it like Paris Hilton --- Rich and Retarded

2institute - what bike is that graph for ?
I too would like to install a ignitech or zeeltronic unit , it is all rocket science to me at this moment .

The graph is an Aprilia RS 250 with some pipes and heads, was the end result of 50 odd runs on the dyno one Saturday morning.Interesting about the burnback as the new ignitions blast the plug clean like new !
Hardly rocket science few simple tests and your right to go.

I thought if the burn back went past 75% it was had too much advance

More down to the voltage the ignition delivers to the plug, even on the low starting advance they blast the plug clean.

the new ignitions blast the plug clean like new !

have you seized it yet?
aim for 12-14 deg at peak HP and drop the curve right off down to 4 over 500 rpm
the std curve sold with zeel has 17.7 deg at 11000 and drops to 7.8 at 12000
seems safe enough but if your bike peaks at 11000...
best is to start low and find the peak
yes these ignitions have gains in spark alone