If you were choosing HD Formula + or SPECTRO HEAVY DUTY PRIMARY CHAINCASE OIL in the Primary

[Hoople]

I noticed a reduction in the shifting "clunk" between gears with the new primary lube. Especially the 1-2shift.

I know I am in the minority on this but if HD introduced a gear box that had True Cone Synchronizers which resulted in dead quiet shifting, I would not enjoy it. It means nothing but I love that Clunk.

 

[Haywire]

Thanks for the input guys. Looks like the spectro will be the choice.