kickstart
Well-Known Member
During foot peg trials and errors I noticed the foot peg bolt was a bit short and after checking in more detail it's even shorter than that, they both are.
Long story short, the Foot Peg adaptor on my Bulldog measures .710 (Threaded area) and is aluminum the bolt is 1/2-13 steel. Standard thread engagment is 1.5 X the diameter for similar materials =.750.
Here we have a steel into Aluminum. I no longer have access to all the specs but I'm not comfortable with only half of the threads of the adaptor being used.
Something to think about the next time you put your weight on the pegs to shift things around
Vickie has 1/2-13 ASTM A574 grade 8 Chrome that measure about 3 1/4 and I cut them down for full thread engagement. Anyone familiar with A574 the standard spec for alloy steel (Mostly 4140) Socket Head Cap Screws
knows that any kind of plating is a nono however if I remember correctly it is because of Hydrogen Embrittlement yada yada. It can be baked out or will escape in about 30 days.
I have Pictures to add to this but the site told me they were too big so they will follow. Well I got the pics in from PB and they are a little small anyway
#1 Stock bolt way short
#2 Comparison of stock and total thread engagement bolt, if you can blow this pic up you can see that you lose the first two threads on the stock bolt due to Chamfering.
# 3&4 Total thread engagement on both sides.
If you decide to do this remember to put the die nut or die on the bolt before cutting off the excess and very lightly grinding or file the cut end, lube the die before removal.
Long story short, the Foot Peg adaptor on my Bulldog measures .710 (Threaded area) and is aluminum the bolt is 1/2-13 steel. Standard thread engagment is 1.5 X the diameter for similar materials =.750.
Here we have a steel into Aluminum. I no longer have access to all the specs but I'm not comfortable with only half of the threads of the adaptor being used.
Something to think about the next time you put your weight on the pegs to shift things around
Vickie has 1/2-13 ASTM A574 grade 8 Chrome that measure about 3 1/4 and I cut them down for full thread engagement. Anyone familiar with A574 the standard spec for alloy steel (Mostly 4140) Socket Head Cap Screws
knows that any kind of plating is a nono however if I remember correctly it is because of Hydrogen Embrittlement yada yada. It can be baked out or will escape in about 30 days.
I have Pictures to add to this but the site told me they were too big so they will follow. Well I got the pics in from PB and they are a little small anyway
#1 Stock bolt way short
#2 Comparison of stock and total thread engagement bolt, if you can blow this pic up you can see that you lose the first two threads on the stock bolt due to Chamfering.
# 3&4 Total thread engagement on both sides.
If you decide to do this remember to put the die nut or die on the bolt before cutting off the excess and very lightly grinding or file the cut end, lube the die before removal.
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