Drive belt tension
#1
Drive belt tension
Looking at the service manual for 2019 Softails, and I'm a bit confused. The manual states that the guide has marks in 1/16th increments, however when I measure it with a ruler, they are actually 1/8th. The new manual also has new belt and service belt deflection amounts, which is new to me, as my older bikes just had one measurement. Assuming the increment mark size is just a simple manual mistake, the confusing part is - the service deflection amount is 1/2 - 9/16th, so basically 1/16th. That is a much higher tolerance than any other Harley I've had, and I'd say it would be difficult to measure it that accurately.
Are we really supposed to be striving for much smaller tolerance with the new Softails, or is this just a Harley way to make people not over-tighten the belts??
Are we really supposed to be striving for much smaller tolerance with the new Softails, or is this just a Harley way to make people not over-tighten the belts??
#2
#3
Yeah, that I can measure. I'm just surprised how small of a tolerance Harley now specifies. Difference between too tight and too loose is only 1/16th of an inch! My RK was 3/16th... I measured in multiple points on my belt, and most were 10/16th, and tightest was 9/16th. I guess I'll just measure more often...
#6
By multiple points I meant rolling the bike a bit and remeasuring at the same place. Does the belt not stretch a bit unevenly just like a chain?
#7
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#9
The latest number is correct, the 1/2 to 9/16 when they came out at the end of 17 for the 18 model so very many were too tight at 1/4 to 3/8 and they made a lot of noise..
The following 2 users liked this post by Agoober:
justcruising (04-02-2020),
OldMike (04-02-2020)
#10
I modified my belt tension gauge by adding a scale to the side, marked in 1/8 and 1/16 inch increments. I sight the gauge against the edge of the belt guard with the belt slack, note the reading, then add the required force and note the final reading. Subtracting one from the other gives me the deflection.
I did this because my old Softail didn't have any measuring marks on the belt guard.
The following users liked this post:
justcruising (04-03-2020)