Mobile 1 v-twin in the motor
Spectro Heavy Duty Primary Chaincase Oil in the primary
Spectro Platinum Heavy Duty Full Synthetic Gl-5 6-Speed Gear Oil 75W140 in tranny

 

Mobil 1 V in primary and engine, Mobil 1 90-145 Gear oil in trans.

 

Mobil 1 20w50 engine
Mobil 1 75w140 trans (butter smooth shifts)
B&M trick shift primary (better clutch lockup and cooler running)

 

True, in a stock motor.

(and thanks for supporting Walmart).

 

Mobile 1 V-Twin 20-50 Engine

Mobile 1 75-90 Transmission

HD Formula+ Primary

I remember reading about some people having trouble with the clutch slipping using Mobile 1 in the primary so that's why I use HD Formula+. Although it looks like some folks have no problem with Mobile 1 20-50 in the primary...so I don't know.

May give the Mobile 1 75-140 a try in the transmission next time. I have no problem shifting but a pretty good clunk in each shift. For those that use the 75-140 in the transmisson does it help with the shift clunk/clack sound?

 

Redline Shockproof Heavy or Lightweight?

 

"Heavy" is the popular one for street use.

On the drag strip would be the Light version.

 

Mobil 1 in all 3. dealer recomened that I use it in all 3. I use mobil 1 in any thing that uses oil, Car, truck, jeep and the harley. I have for the last 15 years.

 

Same here.....Never understood the logic other than just convenient to use one product for all 3. Seems like it would be too thin for the Trans but I'm no expert.

 

Ultra, Amsoil 20/50 crank, 10/40 primary, 75/110 trans.

Super Glide, Castrol 20/50 dino all three holes.

No problems.