FP3 air fuel ratio tuning with cams

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May 9, 2023 | 06:40 PM

sjones73

Thread Starter

Cruiser

Joined: Sep 2017

Posts: 199

Likes: 35

From: southern Wisconsin

FP3 air fuel ratio tuning with cams

I have installed a set of S&S 551 easy start cams. I now have a low idle tick. Goes away at even a little off idle. (barely any throttle at all)
I double checked everything as far as tightness etc. All is good.
Wondering if I should kick up my air/fuel ratio on my FP3? (setting 17) It is set at 0 right now. Bike gets hot FAST.

Wondering if anyone has had experience dealing with this issue.

Thanks.

May 10, 2023 | 08:30 PM

Max Headflow

Seasoned HDF Member

Joined: Dec 2005

Posts: 19,859

Likes: 7,980

From: poway

Typically when you have a low idle tick, it's a weak lifter but with the easy starts it might be the bob weights in the cam that open the exhaust valves.

May 10, 2023 | 09:58 PM

sjones73

Thread Starter

Cruiser

Joined: Sep 2017

Posts: 199

Likes: 35

From: southern Wisconsin

I have messed with the FP3 air ratio. Didn't fix it.
Max, you might be right, so going to put some lifters in it and recheck all other things. Should have probably done lifters with new cams from the start. ugh

I will let you know what happens.

Last edited by sjones73; May 10, 2023 at 11:55 PM.

May 11, 2023 | 09:02 AM

porkster

Club Member

Joined: Jun 2008

Posts: 1,076

Likes: 296

From: Casa Grande Az

Quote:

Originally Posted by sjones73

I had an issue with lifter tick on a 106” twin cam with the Easy Start cams a few years back. After ALOT of time and money, for me the cure was the Axtell bypass kit..

https://www.zippersperformance.com/w...pass_valve.pdf