Sputhe Positrac Front
Road Master
Joined: Sep 2008
Posts: 799
Likes: 25
From: Milan,Tennessee
i went ahead and ordered the whole kit..front and back.....it does come with directions.....i love the way mine handles....don't know why you would only install the front ?the rear does make a difference..i have tried it.....
Road Master
Joined: Jul 2006
Posts: 754
Likes: 2
From: New Bern, NC
The Spruthe Positrak, and others like it (True-Trak), locks or ties the engine to the frame so that this side load can only be applied in the vertical plane, thus eliminating the "twitch".
Hope this helps.
Road Warrior
Joined: Apr 2008
Posts: 1,899
Likes: 8
From: Aurora, IL
The swing arm is bolted to a rubber mounted engine, and transmission. The rubber engine and trans mounts allow side to side and up and down motion. Since the swingarm is rubber mounted via the transmission, the rear wheel and swing arm will move side to side when you throttle it out of a corner causing a very wierd feel. The sputhe and truetrac eliminate the side to side motion and keep the engine, trans and swing arm in line with the frame eliminating the rear wheel wander. Something HD should have done, and they know it!
Same thing dlstanf2 said, I just dumbed it up.
Same thing dlstanf2 said, I just dumbed it up.
Club Member
Joined: Feb 2008
Posts: 11,483
Likes: 39
From: Passaic County, NJ
I don't believe so because the TC B is a solid mount as opposed to the TC A motor which is rubber mounted.
Road Warrior
Joined: Dec 2008
Posts: 1,530
Likes: 1
From: Upstate, SC
The swing arm is bolted to a rubber mounted engine, and transmission. The rubber engine and trans mounts allow side to side and up and down motion. Since the swingarm is rubber mounted via the transmission, the rear wheel and swing arm will move side to side when you throttle it out of a corner causing a very wierd feel. The sputhe and truetrac eliminate the side to side motion and keep the engine, trans and swing arm in line with the frame eliminating the rear wheel wander. Something HD should have done, and they know it!
Same thing dlstanf2 said, I just dumbed it up.
Same thing dlstanf2 said, I just dumbed it up.
Road Warrior
Joined: Nov 2008
Posts: 1,789
Likes: 9
From: Double Oak, Texas
The swing arm is bolted to a rubber mounted engine, and transmission. The rubber engine and trans mounts allow side to side and up and down motion. Since the swingarm is rubber mounted via the transmission, the rear wheel and swing arm will move side to side when you throttle it out of a corner causing a very wierd feel. The sputhe and truetrac eliminate the side to side motion and keep the engine, trans and swing arm in line with the frame eliminating the rear wheel wander. Something HD should have done, and they know it!
Same thing dlstanf2 said, I just dumbed it up.
Same thing dlstanf2 said, I just dumbed it up.
when exceeding 60 mph in turns. Feels like the rear is following really badly lined up rain grooves. Have not noticed it AT ALL on tight radius turns up to the said 60 mph. I ride pretty aggressively (for a cruiser) and my engine puts out plenty more steam than stock (about +67% more) which would surely test the mounting system of my Dyna.
The photos of the Harley are with the stock Harley motor mount, the bike handled as if on rails......... below 60 mph.
riding other bikes semi-aggressively ....
Because, I'm cheap, the rear is a pain to mount, and the front solves at least 80% of the problem. I don't ride really hard.
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Road Warrior
Joined: Apr 2008
Posts: 1,899
Likes: 8
From: Aurora, IL
I didnt really notice it on mine till I played with the engine. Now with 110tq it wanders pretty bad when I twist the throttle in a turn. My brother was behind me and said it looks like the rear tire has a bad wobble.
Road Warrior
Joined: Aug 2008
Posts: 1,500
Likes: 0
From: Brunswick, OH
I have noticed the wandering, self steering rear end on my Dyna, ONLY
when exceeding 60 mph in turns. Feels like the rear is following really badly lined up rain grooves. Have not noticed it AT ALL on tight radius turns up to the said 60 mph. I ride pretty aggressively (for a cruiser) and my engine puts out plenty more steam than stock (about +67% more) which would surely test the mounting system of my Dyna.
The photos of the Harley are with the stock Harley motor mount, the bike handled as if on rails......... below 60 mph.
riding other bikes semi-aggressively ....
when exceeding 60 mph in turns. Feels like the rear is following really badly lined up rain grooves. Have not noticed it AT ALL on tight radius turns up to the said 60 mph. I ride pretty aggressively (for a cruiser) and my engine puts out plenty more steam than stock (about +67% more) which would surely test the mounting system of my Dyna.
The photos of the Harley are with the stock Harley motor mount, the bike handled as if on rails......... below 60 mph.
riding other bikes semi-aggressively ....
You're killin' it on that Aprilla!
I love my True Track, I'll never take it off. It really helps with speedy cornering
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