Lock washers for pipe flanges to head
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Intermediate
Joined: Jan 2020
Posts: 37
Likes: 6
From: Gainesville
Lock washers for pipe flanges to head
Why don't the nuts that hold the pipe flanges to the heads use a lock washer? Also, they did not have Loctite. By feel, they were about a 10 ft pounds of torque. Not real tight. 3/8 ratchet took no effort in removing.
And then, what do you do when you replace your pipes? Do you add lock washers or use Loctite? Or just use those simpleton nut/washers that came on the bike? There is plenty of bolt space to add a lock washer....
2020 LRS.
And then, what do you do when you replace your pipes? Do you add lock washers or use Loctite? Or just use those simpleton nut/washers that came on the bike? There is plenty of bolt space to add a lock washer....
2020 LRS.
Last edited by Cepages; Jan 29, 2020 at 12:33 PM. Reason: added model
Road Master
Joined: Jan 2016
Posts: 1,143
Likes: 433
From: Menifee, CA
I pulled the exhaust system off a couple times (stock 2018 RGU) to do other things that I needed more room for, such as working on the clutch slave, or cleaning and lubricating the foot brake pedal. Gotta remove the headers.
Here's what I learned about the headers going in to the heads. Don't worry about lock washers. They apparently are not needed. Don't bother replacing the exhaust gaskets, unless they are bunged up, which they shouldn't be. Make sure the headers go straight into the heads, and keep checking as you snug up the nuts. Snug them to spec, as explained in the service manual. Put everything else back on (tighten clamps in stages front to rear), and take the bike out for a nice long ride, checking for leaks along the way. Should have no "backfiring" or decel popping. Let the bike cool down overnight, and recheck the header nut torque. They almost surely will need more torque.
If you do end up replacing the gaskets, it is a weird job compared to other bikes I've seen. Takes a "special tool" but you can get it done by hand. Best not to replace, they appear to be useable for many cycles.
Here's what I learned about the headers going in to the heads. Don't worry about lock washers. They apparently are not needed. Don't bother replacing the exhaust gaskets, unless they are bunged up, which they shouldn't be. Make sure the headers go straight into the heads, and keep checking as you snug up the nuts. Snug them to spec, as explained in the service manual. Put everything else back on (tighten clamps in stages front to rear), and take the bike out for a nice long ride, checking for leaks along the way. Should have no "backfiring" or decel popping. Let the bike cool down overnight, and recheck the header nut torque. They almost surely will need more torque.
If you do end up replacing the gaskets, it is a weird job compared to other bikes I've seen. Takes a "special tool" but you can get it done by hand. Best not to replace, they appear to be useable for many cycles.
Seasoned HDF Member
Joined: Jan 2007
Posts: 20,616
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From: anacoco, la
that's about right. by spec, they are torqued to 100-120 inch/lbs.
100 in lbs, no lock washers, DO NOT use loctite
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Jamie Long / Fuel Moto USA
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Jamie Long / Fuel Moto USA
The USA's Leader V-Twin EFI & Performance www.fuelmotousa.com
Contact 920-423-3309
Email jamie@fuelmotousa.com
Club Member
Joined: Apr 2016
Posts: 11,598
Likes: 8,427
From: Inland NW
Why don't the nuts that hold the pipe flanges to the heads use a lock washer? Also, they did not have Loctite. By feel, they were about a 10 ft pounds of torque. Not real tight. 3/8 ratchet took no effort in removing.
And then, what do you do when you replace your pipes? Do you add lock washers or use Loctite? Or just use those simpleton nut/washers that came on the bike? There is plenty of bolt space to add a lock washer....
2020 LRS.
And then, what do you do when you replace your pipes? Do you add lock washers or use Loctite? Or just use those simpleton nut/washers that came on the bike? There is plenty of bolt space to add a lock washer....
2020 LRS.
Club Member
Joined: Dec 2014
Posts: 10,734
Likes: 3,755
From: SWFL
Loctite is useless with that heat.
I've seen some who double up the nuts. I've never, nor have I had one go loose. Torque on install, check/torque again after a couple hours run time is all they need.
I've seen some who double up the nuts. I've never, nor have I had one go loose. Torque on install, check/torque again after a couple hours run time is all they need.
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