6th Gear Tops Out At 3200 RPM
Thread Starter
|
Tourer
Joined: Apr 2012
Posts: 388
Likes: 1
From: Carthage, NC
No. I warmed it up first. The book said to do the test at operating temperature if possible. I let the bike run for about 5 minutes prior to taking the readings.
Seasoned HDF Member
Joined: Mar 2010
Posts: 38,414
Likes: 6,366
From: Honah Lee
Fuel filter. However, you usually lose your idle if it is the fuel filter on a normal stock Harley since idle is lean. With a tuner and your set up, it would show up at the top end. Do a fuel pressure test. It is always the same so idle or WOT has the same since the relief controls it. Around 65 PSI.
Be sure the throttle body is open when checking compression Throttle by electrical requires you to manually open it or a procedure. This would enable you to not have to take the cover off the filter. However, now would be a good time to do that. Maybe a rodent has taken up residency!? Haa.. Pull the fuel pump relay. You don't add oil unless it is low and then that shows you if it is rings or valves. Leakdown probably is better to check where the leak is if the original standard compression test is low.
Be sure the throttle body is open when checking compression Throttle by electrical requires you to manually open it or a procedure. This would enable you to not have to take the cover off the filter. However, now would be a good time to do that. Maybe a rodent has taken up residency!? Haa.. Pull the fuel pump relay. You don't add oil unless it is low and then that shows you if it is rings or valves. Leakdown probably is better to check where the leak is if the original standard compression test is low.
Last edited by Jackie Paper; Apr 14, 2020 at 09:57 AM.
Seasoned HDF Member
Joined: Oct 2019
Posts: 10,751
Likes: 7,375
From: OH
OP states that bike previously exceeded 3200rpm/ 95mph in 6th.
How fast did it go before this "started" ?
Road Master
Joined: Mar 2013
Posts: 1,068
Likes: 1,351
From: Kansas
This. Did you replace the fuel filter yet? Always start with the simple maintenance.
Last edited by wmprof; Apr 14, 2020 at 04:03 PM.
Seasoned HDF Member
Joined: May 2012
Posts: 32,934
Likes: 36,028
From: Carlsbad, CA
The higher the gear, and the faster you are going, the more power it would take to go faster. So, Id look at things that would change and impact power: fuel delivery including pump & filter, dirty or worn injectors, timing, compression although you probably eliminated that.
Last edited by TriGeezer; Apr 14, 2020 at 06:08 PM.
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
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
Southpaw Super Glide: A Left-Hand-Drive 1979 Harley FXE Built to Fit the Rider
Verdad Gallardo
Grand HDF Member
Joined: Sep 2013
Posts: 3,820
Likes: 587
From: Michigan
You won't like this answer, but I saw the same thing on my 2007 UC. Scissored crank. Mine was out on the primary side & the compensator was rubbing against the inner primary. Cost $6k+ to fix.
Seasoned HDF Member
Joined: May 2012
Posts: 32,934
Likes: 36,028
From: Carlsbad, CA
Wouldn't that make a gawd awful sound?