Primary case redline oil problem
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Intermediate
Joined: Mar 2020
Posts: 44
Likes: 9
From: Oregon
Primary case redline oil problem
So I went with a redline oil change kit. The engine oil made a difference in my ride today. Engine stayed cooler and maintained better performance.
when I got back I decided to do the primary oil. Problem is the redline kit came with transmission fluid with shockproof and primary case fluid.
I used the transmission fluid and the primary case was very noisy when I took it out for a test ride. Made a whirring sound I dont remember it making. Is that normal, or should I drain that fluid and go with the primary fluid or the extra 20w-50 I have left over (two extra quarts out of five)? Shifts were easy and made no other indications of a problem.
when I got back I decided to do the primary oil. Problem is the redline kit came with transmission fluid with shockproof and primary case fluid.
I used the transmission fluid and the primary case was very noisy when I took it out for a test ride. Made a whirring sound I dont remember it making. Is that normal, or should I drain that fluid and go with the primary fluid or the extra 20w-50 I have left over (two extra quarts out of five)? Shifts were easy and made no other indications of a problem.
Road Warrior
Joined: Jul 2013
Posts: 1,649
Likes: 443
From: Indianapolis
Red line recommends the 75w-90 diff lube for the Sportster combined primary/transmission (one shared oil supply lubricates both).
Other Red Line options for Sportsters are Power Sports 20w-50 engine oil, MT-90 transmission fluid and 75w-90NS diff lube without the limited slip additive.
Of the products you have I would run the 20w-50 in the primary/transmission.
It is compatible with the wet clutch and about the same viscosity as HD Formula+ .
The V-Twin Power packs are for the HD Big Twin bikes that have a separate primary and transmission fluid.
The Red Line PowerSports transmission lube has a "shockproof" additive that tends to gum up the Sportster clutch plates but is very good for the BT transmission.
Other Red Line options for Sportsters are Power Sports 20w-50 engine oil, MT-90 transmission fluid and 75w-90NS diff lube without the limited slip additive.
Of the products you have I would run the 20w-50 in the primary/transmission.
It is compatible with the wet clutch and about the same viscosity as HD Formula+ .
The V-Twin Power packs are for the HD Big Twin bikes that have a separate primary and transmission fluid.
The Red Line PowerSports transmission lube has a "shockproof" additive that tends to gum up the Sportster clutch plates but is very good for the BT transmission.
Thread Starter
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Intermediate
Joined: Mar 2020
Posts: 44
Likes: 9
From: Oregon
I dont have an oil temp gauge but after a 150 mile ride idle was at around 1150 where just two hours early idle was sitting around 950. Those 200 rpms made for much smoother take offs.
I rode through the Anza valley through the Ortega Highway and down to the Temecula wine country. Its straight windy roads with lots of down shifting and up shifting and I had just done the same ride the day before. Very noticeable change in how the engine felt when rpms got high in 3rd and 4th gear.
Ill be throwing the 20w-50 in and then changing the primary fluid a couple times over the next couple weeks to try to get that shockproof out of there
I rode through the Anza valley through the Ortega Highway and down to the Temecula wine country. Its straight windy roads with lots of down shifting and up shifting and I had just done the same ride the day before. Very noticeable change in how the engine felt when rpms got high in 3rd and 4th gear.
Ill be throwing the 20w-50 in and then changing the primary fluid a couple times over the next couple weeks to try to get that shockproof out of there
Road Warrior
Joined: Sep 2017
Posts: 1,609
Likes: 694
From: over the mountain
Here is Red Lines official response -
Thank you for contacting Red Line Oil, in the shared Sportster primary/transmission the 75W90 is recommended, a product that has been used extensively and performs well.
The 75W90 is the product we have have used for a number of years with very good results in Sportster/Buell transmissions, matching the viscosity and type fluid called for.
The 80W Motorcycle Gear Oil is a lower viscosity than called for, the ShockProof gear oils can due to their unique characteristics could cause sticking of the Harley clutches.
The 75W90 would be preferred and recommended over 80W Motorcycle Gear Oil in these applications.
There can be issues with some GL-5 gear oils in certain applications. Some can be corrosive to brass, bronze or copper, not an issue with our GL-5 gear oils, they don�t cause corrosion, pitting or metal removal. In a synchro equipped transmission the friction modifiers contained in many gear oils can make them too slippery, though not the case in a motorcycle transmission with dog rings.
So if you want the right viscosity and dont want to worry about it damaging anything, go with Redline http://www.redlineoil.com/product.aspx?pid=133&pcid=4
Thank you for contacting Red Line Oil, in the shared Sportster primary/transmission the 75W90 is recommended, a product that has been used extensively and performs well.
The 75W90 is the product we have have used for a number of years with very good results in Sportster/Buell transmissions, matching the viscosity and type fluid called for.
The 80W Motorcycle Gear Oil is a lower viscosity than called for, the ShockProof gear oils can due to their unique characteristics could cause sticking of the Harley clutches.
The 75W90 would be preferred and recommended over 80W Motorcycle Gear Oil in these applications.
There can be issues with some GL-5 gear oils in certain applications. Some can be corrosive to brass, bronze or copper, not an issue with our GL-5 gear oils, they don�t cause corrosion, pitting or metal removal. In a synchro equipped transmission the friction modifiers contained in many gear oils can make them too slippery, though not the case in a motorcycle transmission with dog rings.
So if you want the right viscosity and dont want to worry about it damaging anything, go with Redline http://www.redlineoil.com/product.aspx?pid=133&pcid=4
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Thread Starter
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Intermediate
Joined: Mar 2020
Posts: 44
Likes: 9
From: Oregon
So I went through I changed the primary case fluid twice with cheap 20w-50 to flush the transmission fluid out and then threw in the redline primary case fluid. Still shifts nice. I did the clutch adjustment and the primary chain check. Clutch needed adjusting bad. Now theres a lot less play.
Overall I learned my lesson with the boxed set. I could have spent a lot less money and got exactly what I needed
. Could have used that extra toward highway pegs. Oh well. Thanks for the help you guys. Always appreciated
Overall I learned my lesson with the boxed set. I could have spent a lot less money and got exactly what I needed
. Could have used that extra toward highway pegs. Oh well. Thanks for the help you guys. Always appreciated
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Road Warrior
Joined: Apr 2017
Posts: 1,451
Likes: 230
From: United States
Save ya self the head aches and just run Amsoil 20 / 50 full syn in ya engine and their full syn brew for ya primary.
I have a 2017 1200 sporty and it aint run better.
Drops 🎤 You can thank me later.
Wiz 🍻
I have a 2017 1200 sporty and it aint run better.
Drops 🎤 You can thank me later.
Wiz 🍻
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