Cycle whore thread
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Joined: May 2006
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TwoWheels YearRound
Joined: Mar 2010
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From: Inside the Beltway
Re: Cycle whore thread
TwoWheels YearRound
Joined: Mar 2010
Posts: 12,705
Likes: 0
From: Inside the Beltway
Re: Cycle whore thread
Band
Joined: Feb 2010
Posts: 9,553
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From: DayCrew
Re: Cycle whore thread
http://www.randakks.com/TechTip6.htm
1975-1977 GL1000s are blessed with a Superbike-class engine. Although riders tend to think of them as "torquey" since there's plenty of low-end grunt and a heavy flywheel effect, it's actually a rather "peaky" engine. In fact, the torque peak is up around 6500 rpms in typical Honda fashion for performance engines from this era. Also, the cam specs (duration, lift and overlap) are fairly radical. Part of the issue with the GL1000 idle is the slightly "lumpy" cam that causes semi-irregular cylinder filling/firing at low speeds. Not as bad as a AA fuel dragster but very noticeable to a good ear. It just seems to be a fact that flat "boxer" engines like this (also Porsche, Subaru, VW, BMW, etc.) generally don't sound sweet at idle. It's unreasonable to expect a peaky engine, with a semi-radical cam to have a perfect idle. GL1000s will tolerate a great deal of low speed "lugging" before they complain…usually by fouling plugs. Personally, I make a conscious effort not to spend much time below 3,000 rpms.
So Honda put a fucking race motor in a touring bike.
Good news for me though, I'm just crazy enough to ride the 2-wheel equivalent of an overstuffed leather sofa SCREEEEEEEEEEAMING down the highway in 3rd.
I cannot fucking wait to get these bikes running again.
1975-1977 GL1000s are blessed with a Superbike-class engine. Although riders tend to think of them as "torquey" since there's plenty of low-end grunt and a heavy flywheel effect, it's actually a rather "peaky" engine. In fact, the torque peak is up around 6500 rpms in typical Honda fashion for performance engines from this era. Also, the cam specs (duration, lift and overlap) are fairly radical. Part of the issue with the GL1000 idle is the slightly "lumpy" cam that causes semi-irregular cylinder filling/firing at low speeds. Not as bad as a AA fuel dragster but very noticeable to a good ear. It just seems to be a fact that flat "boxer" engines like this (also Porsche, Subaru, VW, BMW, etc.) generally don't sound sweet at idle. It's unreasonable to expect a peaky engine, with a semi-radical cam to have a perfect idle. GL1000s will tolerate a great deal of low speed "lugging" before they complain…usually by fouling plugs. Personally, I make a conscious effort not to spend much time below 3,000 rpms.
So Honda put a fucking race motor in a touring bike.
Good news for me though, I'm just crazy enough to ride the 2-wheel equivalent of an overstuffed leather sofa SCREEEEEEEEEEAMING down the highway in 3rd.
I cannot fucking wait to get these bikes running again.
TwoWheels YearRound
Joined: Mar 2010
Posts: 12,705
Likes: 0
From: Inside the Beltway
Re: Cycle whore thread
Last edited by Southwade; Sep 19, 2011 at 10:06 PM.
