That is the 12 T output sprocket on the old 4G. i’m guessing the groves were caused by the old chain alinement, it was not centered in the middle of the chain it was off to the right side in the link and maybe more alinement problems?
You put the master link on the pedal side backward, you want the closed side toward the direction of travel. The engine side is fine.Got the 1/2 links and more 415 chain today and spent a little time working on it.
The #415 1/2 link hole for the master link was not big enough for the master link post to fit through it but the #410 1/2 links worked fine?
What I did was add a 1/2 link to the peddle chain to be able to move the axle back further with the drive chain but it pretty much boils down to either being to long or to short without moving the engine forward.
I do have the option to move the engine forward, right now it is positioned as far back as it can go so I think that is my next step. Right now the axle is as far back as it can go in the drop out link, maybe it’s to far back now? So the engine needs to be move forward.
The nice thing about moving the engine forward a bit it is it does not effect the peddle chain.
The pictures below show the slots on the engine bracket and on the rear of the engine is a set bolt to move the engine forward.
The red paint on the chain is the link that I had the the last chain cut too which moved the wheel pretty tight to the front of the rear fender.
There is a picture of the 1/2 link on the peddle chain and also a picture to how far back the axle is to the end of the drop link. I believe by moving the engine up a little I will be able to move the rear axle up closer to the center line mark.
They might have sent you 415hd half links or #41 half links & I think they use a slightly bigger chain link pin. I've ran across this b4 but cant remember what I had found.Thanks for the heads up!
Will be moving the engine forward this morning might be messing with the peddle chain again anyways?
Anyone else have problems with # 415 1/2 links not letting the master link post to pass thru it?