ATF in primary
Road Master
Joined: Feb 2018
Posts: 904
Likes: 642
From: west coast
Can see them working in the Buell clutch baskets above, since there are flat areas for the springs to work against..
Not the case on the evo 97 and older baskets isntead, so no solid flat area for them to work as shown in below link (short of lathing up an add in base bottom concaved/top flat additional ring, to covert the pre 98 basket base to a flat surface to start with for the judder springs to work correctly)..
https://i.ebayimg.com/images/g/7dAAA...u/s-l1600.webp
Club Member
Joined: Mar 2009
Posts: 66,094
Likes: 51,354
From: Niles Canyon Ca.
NO unless you run the clutch plates that require it.
Your primary is not an automatic transmission. It does not provide the lube protection needed. But some do.
Wonder why we have so many comps fail clutch issues.
Even wonder why HD went to 80W145 in primary??? And not ATF.
Your primary is not an automatic transmission. It does not provide the lube protection needed. But some do.
Wonder why we have so many comps fail clutch issues.
Even wonder why HD went to 80W145 in primary??? And not ATF.
Seasoned HDF Member
Joined: Mar 2010
Posts: 21,005
Likes: 7,540
From: Poolville
My Evo at a 24/36@1.50:1 in a 97" motor works very well ..
Club Member
Joined: Mar 2009
Posts: 66,094
Likes: 51,354
From: Niles Canyon Ca.
Have to agree.. The 24/37@1.54:1 was great for the smaller motors and never even heard of compensator issues.. The 7% drop in 2000 wasn't that bad and the compensators still handled it well with the bigger 88 but going to a 1.35:1 in the primary definitely out more of a load on the compensator and crank..
My Evo at a 24/36@1.50:1 in a 97" motor works very well ..
My Evo at a 24/36@1.50:1 in a 97" motor works very well ..
Grand HDF Member
Joined: Sep 2022
Posts: 4,247
Likes: 3,668
From: Florida
As to gearing… I played around with inner/outer primary ratios in the shovel world too. But I got pretty stubborn after lots of trial and error to always do stock inner, 23 tranny and clear down to 46 on the rear. If I went 24 on the tranny I could kiss my inner primary good by. If I went two large or too small motor sprocket the primary chain lasted about half its life even if I checked adjustment weekly… With all that said, the EVO Softail gearing seems about right for mild hopped stock motors. My RK 98 seems geared pretty nice stock. But when I went 127, it was and still is a trial and error searching for perfection. My shovel know how is valuable.. but not completely applicable. Gotta let go of some of my opinions because the rules changed.
Club Member
Joined: Mar 2009
Posts: 66,094
Likes: 51,354
From: Niles Canyon Ca.
As to gearing
I played around with inner/outer primary ratios in the shovel world too. But I got pretty stubborn after lots of trial and error to always do stock inner, 23 tranny and clear down to 46 on the rear. If I went 24 on the tranny I could kiss my inner primary good by. If I went two large or too small motor sprocket the primary chain lasted about half its life even if I checked adjustment weekly
With all that said, the EVO Softail gearing seems about right for mild hopped stock motors. My RK 98 seems geared pretty nice stock. But when I went 127, it was and still is a trial and error searching for perfection. My shovel know how is valuable.. but not completely applicable. Gotta let go of some of my opinions because the rules changed.
93" hot build, frame & swingarm mod's, made my axle adjusters 3" long inside to reinforce and stiffen it, rear pulley games again for a shorter belt I found, 32-65, a sidecar first gear set, 3.00-1, solved the off the line & low end issue and left the legs alone, no idea what top end is, gets to 100 in a hurry.
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