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TECHNICAL MOTOBRICK WRENCHING In Remembrance of Inge K. => The Motobrick Workshop => Topic started by: Billk on September 14, 2018, 08:48:55 PM

Title: Gear Oil
Post by: Billk on September 14, 2018, 08:48:55 PM

Looking to try Redline Synthetic Gear oil.
There’s at least 3 different ones.
2 with different weight# and one that says Shock
Proof.
Could the guys that have used this let me know
which one they’ve tried and did they like it.
I’m trying to improve the 1 to 2 shift
Bill 95 K75

Title: Re: Gear Oil
Post by: The Mighty Gryphon on September 14, 2018, 09:02:07 PM

Have you lubed the clutch splines?  They have a major impact on the 1-2 and 2-1 shift. 

Title: Re: Gear Oil
Post by: Chaos on September 14, 2018, 09:15:02 PM

+1 on the splines, it's a common issue with these bikes.  As for the Redline I'd recommend the Heavy Duty Shockproof for the transmission.  I've been using it in my Ural and notice a dramatic improvement.  But that is a box of rocks and gravel, it might be overkill with a K bike. I've never had shifting issues with regular gear oil (except at 100K with a bent shift fork) Somewhere north of 200K now, I think it has Valvoline Syn 75-140 in it.

Title: Re: Gear Oil
Post by: The Mighty Gryphon on September 14, 2018, 09:24:37 PM

I throw a couple spoonsful of Molybdenum disulfide powder in the transmission.  After a couple hundred miles of running it coats everything in there and makes all the parts that slide around when you shift move more easily.

Title: Re: Gear Oil
Post by: Billk on September 15, 2018, 09:31:53 PM

Redline makes:
-75W90 GL-5
-75W140
-Super light Shock Proof 75W90
-Heavy Shock Proof

Which one?

Title: Re: Gear Oil
Post by: beemuker on September 16, 2018, 05:16:10 PM

Quote from: Chaos on September 14, 2018, 09:15:02 PM

s.  As for the Redline I'd recommend the Heavy Duty Shockproof for the transmission.  I've been using it in my Ural and notice a dramatic improvement

Title: Re: Gear Oil
Post by: K1300S on September 16, 2018, 10:19:11 PM

shockproof isn't needed in a k bike FD or trans. 
redline MTL in the trans, redline 75/90 ns or 75/140 ns in the FD.  "ns" is the stuff WITHOUT friction modifier for NON-LSD final drives.

i have been using redline stuff in all my BMW's for 20+ years..which includes M street cars and full on racecars.  i only use shockproof in the race car differentials.  things that are really heavily loaded in track conditions.  we call shockproof "blue goo" because it stains and makes a mess of everything.

Title: Re: Gear Oil
Post by: Billk on September 18, 2018, 04:08:45 PM

Can I use this one?

Title: Re: Gear Oil
Post by: Laitch on September 18, 2018, 04:37:06 PM

Quote from: Billk on September 18, 2018, 04:08:45 PM

Can I use this one?

You were writing about Staburags NBU30 PTM back in July. Have you lubed the transmission input shaft splines? Don't put off that input shaft lube if you don't know when it was done last. That will help you down shift for certain. Be certain your clutch is adjusted, too.  Final drive input shaft gets lubed every tire change.

I use 80W90 from NAPA so I'm not qualified to answer your question. mlytle answered your question.