Topic: Shout-out to Ignitech ignition systems

[Tracksnblades1]

What's your maximum advance for a tuned 750 engine? At the moment I'm at 44°, as you can see, but I'm thinking to give it a couple of degrees more...

44 degrees is a LOT of advance at WFO. Most engines like 32-35 degrees, depending on the combustion chamber efficiency; better chambers need less lead time to start the fire burning.

How is the max advance decided?
https://www.enginebasics.com/Engine%20Basics%20Root%20Folder/Reading%20Spark%20Plugs.html
http://www.nightrider.com/biketech/readplugs.htm

Advance until pinging can be heard, then retard a little?  Or reading plugs?
Back in the 80's I adjusted like that after a hint from a car mechanic, heard some pinging on 5:th gear when WOT around 4000 and pinging  ~5000 rpm was OK for maximal advance. Cars got ignition set like that, could ping around 35mph on highest gear when WOT.
I do not know if this is the best method nor result.

PeWe,

From the horse’s mouth…NGK’s….

https://ngksparkplugs.com/en/resources/spark-plug-basics

I like the extended tip plug if you have room. It may be what your linked article was trying to infer…
Extended tips can sometimes be a compromise for a street driven performance engine…operating like a hotter plug at lower rpms and benefiting from some charge cooling when lots of air and lbs/per/hr of cold fuel is being inhaled at large throttle openings and high rpms…

[MRieck]

I’m leaning that way simply due to the recommendations and they publish a nice installation manual, and make an install kit for our bikes. 

What would you recommend for my engine as a safe redline now? The crank balance came with paper work saying good to 14,000, that’s well north of my comfort zone!

Part of my desire for upgrade is a rev limit as I have a garage full of more powerful bikes and sometimes it’s easy to forget your on the old beast when your having a good time in the twisty mountain roads!

There isn't much gain over 9,500 RPM. With the porting and good carbs the power won't fall off over 10,000 RPM. There isn't much point in putting the spurs to it and revving past there.

[Leino]

I just dynoed a Fz 750 racebike with Ignitech and I was again very satisfied with how easy it is to tune even between two dyno runs, takes a few seconds to adjust the timing or rev limiter or whatever you want to do and that can be done without even turning the engine off.

[PeWe]

I’m leaning that way simply due to the recommendations and they publish a nice installation manual, and make an install kit for our bikes. 

What would you recommend for my engine as a safe redline now? The crank balance came with paper work saying good to 14,000, that’s well north of my comfort zone!

Part of my desire for upgrade is a rev limit as I have a garage full of more powerful bikes and sometimes it’s easy to forget your on the old beast when your having a good time in the twisty mountain roads!

There isn't much gain over 9,500 RPM. With the porting and good carbs the power won't fall off over 10,000 RPM. There isn't much point in putting the spurs to it and revving past there.

My K6 has max around 9200 rpm
I told the dyno man to rev to 9500rpm.
When looking at the chart afterwards, max at 9240 rpm.
Other charts, max at ca 9100 rpm.
Megacycle 125-75 cam.
TMR32 carbs
970cc.

I see same limit on my 836cc charts. Action Fours SS1 and Megacycle 125-20 cam. Sudden power drop at 9200rpm.

125-75 cam is a fantastic cam.
It forced me to buy a new spare just for sure while I could get one. 125-70 hard welded version.

Before that, RC295 was my favourite. I ordered a new spare from Dynoman, DP295.

My bike is a street bike, but I like to use the throttle now and then.

I usually think that revving over 8000rpm is not worth the wear. But it revs up very quickly on 2:nd and 3:rd gear so easy to reach over 9000rpm.

I have recently replaced the 17t front sprocket with a used 18t of similar wear. (Rear 48t).
The acceleration suffer, noticed when passed a gang of slow cars.
Had to gear down more than before.

I'll change back. The extra revs when cruising is not that much.
My K2 runs fine on 17:48 too. Stock rear wheel.
My K6 has 130/80-18. Close to stock 4.0 circumference.