Engine Braking
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Novice
Joined: Jun 2008
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Engine Braking
I was told by one of my instructors at the MFS course I took last month that engine braking was bad on Harleys. I just bought my first Harley this weekend and want to make sure I keep it in the best shape that I can. I'd never heard that before so was going to see if you guys thought the same thing.
Road Captain
Joined: Apr 2007
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From:
Engine braking in moderation won't hurt. Some say it'll twist the new cranks (the ones mfg. since '02). I suppose it would if you were say cruising in 5th at about 50, and stomped it down to 3rd and dumped the clutch. Can't imagine it would be good for any motor to do that come to think of it.
Ultimate HDF Member
Joined: Jan 2008
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From: Republic of Texas
The only way I know to come down a Mountain road with twisty's. I was taught use lowest gear necessary to maintain control. Watch engine rpm's and use front and rear brakes as necessary to help maintain control of speed. To me that meant find a gear that holds your speed without over reving engine and tap bakes to bleed off speed and energy. I was specifically taught not to ride my brakes. That to do so would heat up fluid, burn rotors and glaze pads and rotors possibly causing brake failure.
Road Captain
Joined: Apr 2008
Posts: 547
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From: Republic Of Texas
at 8.8 to 1 compression ratio engine braking on my TC88 is if anything, too good
where do these MSC experts come from?
if you dont believe me let off the throttle and drop it into first while going about 20mph..
(disclaimer: dont really drop it into first while going 20mph which could result in serious injury or death as they say)
where do these MSC experts come from?
if you dont believe me let off the throttle and drop it into first while going about 20mph..
(disclaimer: dont really drop it into first while going 20mph which could result in serious injury or death as they say)
Grand HDF Member
Joined: May 2006
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From: SE NC
+1 on what King FLH said. Common sense prevails. Also road conditions could effect the traction of the rear tire while "engine braking",. like wet slippery roads, sandy etc, etc. It could be possible for you to bust lose the rear tire, but I think that you would have to be excessively (engine) braking though.
Road Captain
Joined: Apr 2008
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From: Republic Of Texas
oh I get it he says its bad "for" Harleys? or doesnt work good on Harleys? w.t.f.??
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Road Warrior
Joined: Dec 2005
Posts: 1,950
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From: Colorado Springs, CO
Sort of. Deceleration against vehicle weight with a closed throttle will make for a lean mixture. We all know what happens then. That's the theory, anyway.
That being said, I wouldn't worry about it too much. Most people ride/drive that way, without any significant ill effects.
Useing clutch, engine, and downshifting to slow a vehice will wear out the clutch sooner than if you used the brakes with the clutch in. Brakes pads are cheaper and easier to replace than a clutch.
You have an engine, clutch and trasmission to get you moving and keep you moving. You have brakes for just the opposite. Use each one for their designed purpose, and don't sweat it.
That being said, I wouldn't worry about it too much. Most people ride/drive that way, without any significant ill effects.
Useing clutch, engine, and downshifting to slow a vehice will wear out the clutch sooner than if you used the brakes with the clutch in. Brakes pads are cheaper and easier to replace than a clutch.
You have an engine, clutch and trasmission to get you moving and keep you moving. You have brakes for just the opposite. Use each one for their designed purpose, and don't sweat it.
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Cruiser
Joined: Aug 2008
Posts: 184
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From: Madison, MS
If i'm approaching a stop i'll pull in the clutch and coast till i need to brake. Saves a little gas over having the engine rev during downshifts -- plus i just love to hear the engine go putt-putt-putt while i'm coasting at 40 miles an hour! IMO there's nothing wrong with using the engine for braking (in moderation) but i'd rather replace brake pads than clutch plates. I downshift if i'm going into a curve or going down a hill as Oldairboater described - but hey, that's just me 
Last edited by damfino; Aug 18, 2008 at 01:36 PM. Reason: can't spell
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The reason the instructor singled out Harley's is because he said there's something (you'll have to excuse my lack of technical terms...I'm a little bit mechanically challenged) that pushes against the belt to keep it tight and engine braking puts too much pressure on the belt and may eventually cause it to stretch so much that it starts to slip...or worse.