Proper engine mount isolator bolt torque
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Cruiser
Joined: May 2013
Posts: 218
Likes: 4
From: Central FL
Proper engine mount isolator bolt torque
I replaced my worn out front motor mount with the Buell L1501.8 mount.
The instruction sheet that came with it specifies an isolator bolt torque range of 63-70 ft-lbs. This mount is intended for Buell bikes, but is identical to the Harley motor mount B-revision supposedly.
The factory service manual for my EG specifies 35-45 ft-lbs.
My just-received handy dandy 97-05 Ready Reference Torque Values booklet specifies 15-20 IN-LBS....
So of the three, which range should I be tightening this main bolt?
The instruction sheet that came with it specifies an isolator bolt torque range of 63-70 ft-lbs. This mount is intended for Buell bikes, but is identical to the Harley motor mount B-revision supposedly.
The factory service manual for my EG specifies 35-45 ft-lbs.
My just-received handy dandy 97-05 Ready Reference Torque Values booklet specifies 15-20 IN-LBS....
So of the three, which range should I be tightening this main bolt?
Club Member
Joined: Jun 2007
Posts: 45,429
Likes: 2,897
From: Bedford UK
I agree with fabrik8r. You've gone away from stock, so the stock numbers are overtaken by the instructions for the part you've chosen. I have an S&S 107" and still use the stock mount, which is fine, for future reference.
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Cruiser
Joined: May 2013
Posts: 218
Likes: 4
From: Central FL
But if the Buell part is the Harley 16207-79B part, just under a different number, have I really gone away from stock (my parts book lists the B revision as what came on the bike)?
Grand HDF Member
Joined: Dec 2007
Posts: 4,999
Likes: 55
From: Bay Area
I would say yes. The frame design and motor fitment is different than a bagger and probably has different harmonic and vibration levels. Doesnt a Buell run in the 8k rpm range?
Club Member
Joined: Jun 2007
Posts: 45,429
Likes: 2,897
From: Bedford UK
I've owned Buells for many years. If they use Harley parts then they show the stock Harley part number in my experience (oil filters for example). So I would be surprised if the Buell part is the same as a Harley part, just given a different number. That sounds like internet chatter to me!
Seasoned HDF Member
Joined: Nov 2010
Posts: 17,547
Likes: 7,153
From: Oxford, Nc
I have the same part and torqued it to 20 ft/lbs when I installed it several years ago and forgot about it (which is a good sign I'd guess.)
It's not that tough to readjust if necessary. (Buell wants you to put 70 lbs on a 3/8" bolt huh?)
It's not that tough to readjust if necessary. (Buell wants you to put 70 lbs on a 3/8" bolt huh?)
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