Belt tension?
Belt tension?
Cruiser
Joined: Jul 2007
Posts: 187
Likes: 0
From: Southern Tier (Owego) N.Y.
Rear Belt Drive Adjustment
Performance and Technical information on the rear belt drive for Harley-Davidson motorcycles.
Belt Drive Adjustment for Big Twins
Set belt tension a the tightest rotational point on the sprockets.
The adjustments should be done when the bike is cold.
The adjustments should be made with the weight of a rider on the bike.
1. At the lower strand, position "A", mid-way between transmission sprocket and rear wheel sprocket, apply 10 Ibs. of upward force on lower span of rear belt. Harley-Davidson has a BELT TENSION GAUGE (Part No. HD-35381) to help.
2. Measure belt deflection "B" several times, each time with belt moved (by rotating rear wheel) to a different position on sprockets. With sprockets rotated to tightest belt posi-tion, belt deflection "B" (measured at position "A") should be 5/16-3/8 in.
ADJUSTMENT
1. Loosen rear axle nuts.
2. Measure each side from the flat to the end of the swingarm, to be sure rear axle is correctly located.
3. Turn axle adjuster nuts (metric) on each side of swing-arm to adjust belt deflection.
a. Turn clockwise to decrease deflection (increase tension).
b. Turn counterclockwise to increase belt deflection (decrease tension).
Turn each adjuster nut exactly the same number of turns to maintain rear wheel alignment.
5. Tighten axle nut to 60-65 ft-lbs.
http://www.nightrider.com/biketech/hdbeltdrive.htm
Performance and Technical information on the rear belt drive for Harley-Davidson motorcycles.
Belt Drive Adjustment for Big Twins
Set belt tension a the tightest rotational point on the sprockets.
The adjustments should be done when the bike is cold.
The adjustments should be made with the weight of a rider on the bike.
1. At the lower strand, position "A", mid-way between transmission sprocket and rear wheel sprocket, apply 10 Ibs. of upward force on lower span of rear belt. Harley-Davidson has a BELT TENSION GAUGE (Part No. HD-35381) to help.
2. Measure belt deflection "B" several times, each time with belt moved (by rotating rear wheel) to a different position on sprockets. With sprockets rotated to tightest belt posi-tion, belt deflection "B" (measured at position "A") should be 5/16-3/8 in.
ADJUSTMENT
1. Loosen rear axle nuts.
2. Measure each side from the flat to the end of the swingarm, to be sure rear axle is correctly located.
3. Turn axle adjuster nuts (metric) on each side of swing-arm to adjust belt deflection.
a. Turn clockwise to decrease deflection (increase tension).
b. Turn counterclockwise to increase belt deflection (decrease tension).
Turn each adjuster nut exactly the same number of turns to maintain rear wheel alignment.
5. Tighten axle nut to 60-65 ft-lbs.
http://www.nightrider.com/biketech/hdbeltdrive.htm
Cruiser
Joined: Jul 2006
Posts: 248
Likes: 18
From: The GREAT State of Texas
I've heard of some "old school" wrenchers twist the belt by hand. It should twist to about 45 degrees, a little more... too loose, a little less... too tight. Dunno. I still use the handy-dandy HD tension guage for the most part, but, did use the old school method at the same time and it was about spot on.
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