does anyone know if u can get a harden shaft? just been having issues with breaking and chew out the gear on it.....

That means something is wrong.....need to fix the problem first.

its done it in 3 different motors i've had 2 which were rebuilt.....

if you use anything other then a bosch or fomoco dizzy it will chew them out.

hmmmmm i'm using a bosh dizzy but a harden gear on it.... mayb that is chewing out the aux shaft gear...

if you used the dizzy from the first engine that chewed out the aux shaft?
it will keep chewing out the rest,
best to replace the dizzy with a new one when you fit a new aux shaft

You can't miss match new with old parts. the drive on the dizzy needs to stay with its original aux shaft.

replace one and you need to replace the other.
If you replace the dizzy for any reason you should remove the gear from the old dizzy and fit it to the new dizzy.
A new aux shaft needs a new dizzy drive gear.

Running engine oil that is too thick or using a high pressure oil pump also places extra pressure on the gear.
On the subject of oil, try to find and oil that has a high zinc dithiophosphate (ZDDP) content. That will help reduce wear
Mobil 1 0W40 is 1100ppm and Mobil 1 15W50 is 1300ppm.
Valvoline VR1 10W40 has .13% of Zinc and .12% of Phosphorus (i'm not sure what ppm that equates to, but i have emailed valvoline about it)

thanks mate. Might get new aux shaft and new dizzy gear and see how it goes.