spectro primary oil

[curly howard]

been using amsoil 10w40 was thinking about going with spectro(not synthetic)heavy duty primary oil ,all ready run 75/140 6 speed syn in trans, any thoughts? also anyone know what weight the spectro primary oil is? dont say on bottle.

 

[HermitKing]

If it is Spectro HD Primary oil, it is 85w.

 

[TQuentin1]

been using amsoil 10w40 was thinking about going with spectro(not synthetic)heavy duty primary oil ,all ready run 75/140 6 speed syn in trans, any thoughts? also anyone know what weight the spectro primary oil is? dont say on bottle.

I have been running Spectro Heavy Duty Primary fluid in my '03 Ultra for a number of years. I like the Spectro product for this application, and the GL-5 6-spd tranny lube there. I use Mobil 1 VTwin 20W50 in the engine. Seems to be a good combo of products, but I change out all the fluids at the same time every 3-4K miles. Overkill, but cheap insurance from my perspective. Info here:

Spectro Primary Tech Data

TQ

 

[Iceman24]

Love it - like "liquid gold" in the primary...and tranny (I also run Spectro 6-speed GO).

 

[curly howard]

so by 85w, i assume that it is a gear oil spec?

 

[Iceman24]

Yes & no...primary fluid's rated for your clutch + doubles as GO in Sportster case. For your touring bike regular motor oil's a tad light for clutch + GO's too heavy. Spectro 85W is specifically formulated for your clutch.

 

[curly howard]

thanks for the info, much appreciated- spectro it is

 

[67wizard]

I put Spectro in the primary and my clutch would slip, went back to formula+ and no more slipage. Go figure? I use their sixspeed the the trans.

 

[y22c]

Spectro's primary is a 85W and that is a gear oil spec.

The oil IS NOT an engine oil so a gear oil spec must be used.