The All things ROAD KING SPECIAL THREAD

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Jan 25, 2025 | 09:06 PM

#4191

RKS Elvira

6th Gear

Joined: Jan 2022

Posts: 11

Likes: 3

From: WA

Quote:

Originally Posted by paws619

I've seen this mod and given it some thought. My bike is a 17' with the 107 and pretty tame performance mods, cam headers and flash. Did you have sumping issues? What made you choose to do it?

It supposed to mitigate blowby and excessive oil consumption. The NICECNC is a Chinese copy of the Trask CheckM8 Vented Top Cover. I try to buy American but I just can’t justify the money Trask charges for their stuff. I mean it’s literally a $50.00 piece of machined aluminum.

This is from Trask regarding the CheckM8 vented top cover:

The key feature of the CheckM8 vented transmission top cover is the incorporation of a one-way Boyesen valve. This valve plays a crucial role in bleeding off excess crankcase pressure while retaining oil and air mist within the cam chest. By doing so, it enables the oil pump to operate more efficiently, leading to a significant reduction in oil exiting from the head breathers. This not only mitigates oil-related concerns but also results in improved engine performance by facilitating smoother revving.

Last edited by RKS Elvira; Jan 26, 2025 at 12:26 AM.

Jan 26, 2025 | 12:41 AM

#4192

Cornpipe

Club Member

Joined: Sep 2019

Posts: 2,373

Likes: 2,206

From: Midlothian, VA

I made my own vent out of the stock cover and have been running this way for a few years. I didn't use a check valve and have not had any issues.

Jan 26, 2025 | 11:50 AM

#4193

Jumppstreet

Stage I

Joined: Jan 2025

Posts: 1

Likes: 0

2015 Road King Police

I've got a 2015 road king police and the cruise control isn't working. I was going 45 the amber light turns on but it would go green when I set it at speed. What could be the issue?

Jan 26, 2025 | 03:34 PM

#4194

paws619

Cruiser

Joined: Mar 2023

Posts: 170

Likes: 127

From: San Diego

Quote:

Originally Posted by Jumppstreet

I've got a 2015 road king police and the cruise control isn't working. I was going 45 the amber light turns on but it would go green when I set it at speed. What could be the issue?

I had a similar issue after a road trip, mine was in reverse. Not turning off, had to roll the throttle back or hit the brakes. Looked at the housings and they were all pretty dusty despite my "cleaning" the bike when I got home. I do not spray it with water but rather use the bucket and rag. Anywho, I took an old toothbrush to both housings around the switches and have had no problems since.

Jan 26, 2025 | 03:35 PM

#4195

paws619

Cruiser

Joined: Mar 2023

Posts: 170

Likes: 127

From: San Diego

Quote:

Originally Posted by Cornpipe

I made my own vent out of the stock cover and have been running this way for a few years. I didn't use a check valve and have not had any issues.

Your bike is pretty built yeah? Did you have sumping? Did you notice any difference after doing it?

Jan 28, 2025 | 08:00 PM

#4196

AMP'd

Tourer

Joined: Oct 2017

Posts: 282

Likes: 171

From: Homestead

Klock Werks FXRP fairing is on, thanks to the great folks at thefactorymatch for the perfect match.

Jan 28, 2025 | 08:34 PM

#4197

Cornpipe

Club Member

Joined: Sep 2019

Posts: 2,373

Likes: 2,206

From: Midlothian, VA

Quote:

Originally Posted by paws619

Your bike is pretty built yeah? Did you have sumping? Did you notice any difference after doing it?

My RKS is a 2020 so I had the new oil pump from the factory. I never had sumping issues even after pulling the crank position sensor on a few occasions. I did the vent as an added benefit for the bottom end.

Jan 28, 2025 | 08:43 PM

#4198

paws619

Cruiser

Joined: Mar 2023

Posts: 170

Likes: 127

From: San Diego

[QUOTE=Cornpipe;21929615]My RKS is a 2020 so I had the new oil pump from the factory. I never had sumping issues even after pulling the crank position sensor on a few occasions. I did the vent as an added benefit for the bottom end.[/QUOTE

Right on. I've gone back and forth on doing it. Mine is a 17' and those did have some issues. Mine never did but out of an abundance of caution, I upgraded the pump when I did the cam. I'm just about 50K miles and have thought it might help on my long slogs through the desert.