Engine Rattle- high speed
Thread Starter
|
Road Master
Joined: Jul 2006
Posts: 762
Likes: 0
From:
Engine Rattle- high speed
I am going to try and explain this.......I noticed the other day that my 07 has a rattle at the top end when I am doing 50 mph or faster with high rpm of 3,000 plus and twist "wide open" throttle and hold it there.
It does not do it at low end or low rpm. I am not talking "lugging" the engine either.
The last tank I put in was 91 octane with 10% ethanol. \\;\\\\\\;Normally run 92 or higher. Could that be it?
I am running PCIII, Rush slip ons and big sucker air breather.
Ideas?
It does not do it at low end or low rpm. I am not talking "lugging" the engine either.
The last tank I put in was 91 octane with 10% ethanol. \\;\\\\\\;Normally run 92 or higher. Could that be it?
I am running PCIII, Rush slip ons and big sucker air breather.
Ideas?
Advanced
Joined: Mar 2008
Posts: 55
Likes: 0
RE: Engine Rattle- high speed
Mine has been doing that too, between 70 and 100. \\; i.e. 3000 rpm and up. I dialed back the timing -2 degrees.\\; Hope that takes care of it. I think it's both the heat coupled with the summer grade gasoline. \\;
Outstanding HDF Member
Joined: Jun 2007
Posts: 3,306
Likes: 5
From: Bellville, Tx
RE: Engine Rattle- high speed
If you are running ethenol mix you could be leaning out, if that's all you can get for fuel you might put a step larger intermediate jet(for carbs) or remap a little richer.
 \\;
 \\;
Outstanding HDF Member
Joined: Oct 2006
Posts: 2,340
Likes: 2
From: Omaha Nebraska
RE: Engine Rattle- high speed
You dont mention that you have any type of fuel management. You could be running real lean. HD had a TSB for the 2007 because of this problem. They have a free download to sole the problem. But with your exhaust and air mods you need to richen up your fuel mix.
Outstanding HDF Member
Joined: Oct 2006
Posts: 2,340
Likes: 2
From: Omaha Nebraska
RE: Engine Rattle- high speed
I think I would still run it to the dealer for the download. My brothers 07 was doing the same thing with a Power Commander
Trending Topics
Cruiser
Joined: Mar 2008
Posts: 120
Likes: 0
From: New Jersey
RE: Engine Rattle- high speed
 \\;Fuel or timing issues may cause pinging. I see the complaint on this thread is rattling. Rattling is not pinging. Twin cams tend to rattle no matter what you do to fuel or timming. I always wonderd if the gear driven cam system would eliminate this rattle.
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
Outstanding HDF Member
Joined: Oct 2006
Posts: 2,340
Likes: 2
From: Omaha Nebraska
RE: Engine Rattle- high speed
ORIGINAL: peapodcv
\\\\\\;Fuel or timing issues may cause pinging. I see the complaint on this thread is rattling. Rattling is not pinging. Twin cams tend to rattle no matter what you do to fuel or timming. I always wonderd if the gear driven cam system would eliminate this rattle.
\\\\\\;Fuel or timing issues may cause pinging. I see the complaint on this thread is rattling. Rattling is not pinging. Twin cams tend to rattle no matter what you do to fuel or timming. I always wonderd if the gear driven cam system would eliminate this rattle.