Compression after 250 miles
Thread Starter
|
Seasoned HDF Member
Joined: Sep 2010
Posts: 10,238
Likes: 799
From: Indiana
Compression after 250 miles
So, I'm just messing around in the garage and decided to do a compression test and check the plugs after 250 miles (after the top end job).
Front cylinder 165 psi, rear 170psi and the plugs look like this.
So far, so good?
Front cylinder 165 psi, rear 170psi and the plugs look like this.
So far, so good?
Road Master
Joined: Apr 2009
Posts: 1,123
Likes: 43
From: NJ
Those plugs look a whole lot better than the last set you posted, does the one on the right have a crack in the porcelian?? Looks like it in the pic. Compression is right where is should be...good job...
Ds
Ds
Thread Starter
|
Seasoned HDF Member
Joined: Sep 2010
Posts: 10,238
Likes: 799
From: Indiana
Dang, i didn't even notice the " crack". I just pulled them and sure enough, one is cracked on both sides. Dam, how does THAT happen? They are NEW.
Thread Starter
|
Seasoned HDF Member
Joined: Sep 2010
Posts: 10,238
Likes: 799
From: Indiana
A tad lean? So, I need to open the screw on the carb bottom a "tad"?
Outstanding HDF Member
Joined: Apr 2012
Posts: 2,938
Likes: 30
From: North Florida
Yea and why is the one on the left have that funky area where the coating looks like it is missing, down near by where the threads are, is it leaking.
Trending Topics
Road Master
Joined: Apr 2009
Posts: 1,123
Likes: 43
From: NJ
No idea how it got cracked, maybe you tilted the socket when loosening...who knows...What number autolites are they, I use the coppers and they seem to last forever for me. You are running the engine in cold weather, cold air is dense with O2 so you will be running a little lean this time of year. If it's running ok then leave stuff alone until the summer/normal riding season.
Ds
Ds
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Verdad Gallardo
8 Best Harley-Davidson Motorcycles Ever
Pouria Savadkouei
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Verdad Gallardo
10 Motorcycles You Should Never Buy
Joe Kucinski
10 Things Harley-Davidson Needs to Fix in 2026
Verdad Gallardo
Thread Starter
|
Seasoned HDF Member
Joined: Sep 2010
Posts: 10,238
Likes: 799
From: Indiana
Something kinda "sticky" on it. Don't know what.....
Thread Starter
|
Seasoned HDF Member
Joined: Sep 2010
Posts: 10,238
Likes: 799
From: Indiana
No idea how it got cracked, maybe you tilted the socket when loosening...who knows...What number autolites are they, I use the coppers and they seem to last forever for me. You are running the engine in cold weather, cold air is dense with O2 so you will be running a little lean this time of year. If it's running ok then leave stuff alone until the summer/normal riding season.
Ds
Ds
