2018 300ec starter issues

[Iakovos1]

Anybody have any thoughts on this kit https://www.ebay.com/itm/Starter-kit...gAAOSwZXRfUQrv

[gg3]

This is how it should have been made.It would solve my problem of lateral movement between the bendix & pinion shafts.If the new starter on order doesn't make any difference(which I don't think it will),my next step is to do some machining & fit a bush each end of the bendix shaft.This guys idea is much better....in theory.

[gg3]

My second cheap KTM copy starter arrived.Did the 180 degree rotation to change rotation to clockwise & tried it.
https://youtu.be/frbNoDAyVac
Still not turning over great but worked.Recap of process-
All positive & negative leads replaced with bigger cable & clean all contacts & earths.
Ran new earth to starter motor mount.
Replaced stator(was ok in hind sight).
Lithium 240cca battery fully charged 13.4v
New AS3 bendix cover & doubled the gaskets.
Welded bendix shaft then got a OEM new bendix (which came welded).
Checked the bevel gear parts 17 & 20 engagement & greased.Checked bevel gear bearings are smooth & whole assembly with pinion gear operate smoothly.
filed & cleaned up sharp edges on the flywheel/ring gear.
Spent countless hours with shims,washers,gaskets & gear marking grease to check & correct engagement of parts.I am fairly convinced the main problem is the pinion gear & bendix bind up when under load.
I am thinking there are new bikes with the pinion shaft & bendix shaft not running parallel and/or distance apart not correct.Other bikes as they get hours up the shaft housings are getting out of round or sloppy causing binding.Both are made worse by small cables not getting enough power to the starter & the constant binding & load is burning out the starters.
The last starter I had I ruined by constant testing.It still spins up fast but has lost torque.I'm sure the new one will give up as well after a while.I am going to try fitting a low friction bush into each end of the bendix shaft housings & then machine down the shaft ends to fit.

[GasGas]

I have been struggling with the button start for the last year or so and finally replaced my battery with a 240 cranking amp unit from Antigravitie batteries. After struggling for so long with the stock battery brand and my old Antigravity 8 cell it was some nice to push the button a couple times on a cold motor and have it running. Towed the bike for an hour on an open trailer at 5 degrees C and it started no problems again. The rest of the day riding it was just touch the button and the motor was running. If you are struggling with your bike do your self a favor and just get a battery with 200 plus cranking amps. I will never own another push button dirt bike without one.

[Doc Brown]

Check this out, its the bendix cover of a new Rieju 300

[SpirosZ1000]

Originally Posted by Doc Brown

Check this out, its the bendix cover of a new Rieju 300

Already on my bike and works like a charm but my old starter is gone and currently waiting for a new arrowhead unit.

[Doc Brown]

Originally Posted by SpirosZ1000

Already on my bike and works like a charm but my old starter is gone and currently waiting for a new arrowhead unit.

Could you please let me know the part number for that cover?

And what did they ask for it?

[blitz11]

I am not very familiar with the new bikes. Did the old one just have a bronze bushing? Interesting that the casting date shows "14." Generally, this would mean that the casting was made in 2014. Perhaps Rieju modified their stock to replace the bushing with a needle bearing? (Please forgive my ignorance if i am way off base.)

[gg3]

They must have an engineer at Reiju !
Old system has no bearings or even simple bronze bushings for the bendix shaft.Notice the new cover has a bush for the pinion shaft as well.Nice.

[blitz11]

Huh? Not even a bronze bushing? That's shocking (pun sort of intended given that this is connected to an electrical part.)

Boy, no wonder there are binding/friction issues. I had no idea that they have a shaft running in an aluminum casting.