GL1200 Top Speed


Information and questions on GL1200 Goldwings (1984-1987)
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Rusty Bike
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GL1200 Top Speed

Postby Rusty Bike » Tue Aug 09, 2016 8:39 pm



OK folks, mine is the SEi but I have heard that they are all rated the same HP. So, how fast will these things go? One up, flat road, no wind, with all plastic mounted. Top speed, how fast? Thanks



tbeiler
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Re: GL1200 Top Speed

Postby tbeiler » Tue Aug 09, 2016 10:01 pm

Rusty, why not get your wheels out there on the open road and open her up, let us know what your Sei can do.
Watch out for the police.

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plumbermullins
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Re: GL1200 Top Speed

Postby plumbermullins » Tue Aug 09, 2016 10:13 pm

one hundred and fifteen and still had some more than I did.
85,000 mile recent head gaskets and belts new tires and a flying machine that's what these sei's are and smooth

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julimike54
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Re: GL1200 Top Speed

Postby julimike54 » Wed Aug 10, 2016 4:05 am

Don't tell leo....115 2 up
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twocams
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Re: GL1200 Top Speed

Postby twocams » Wed Aug 10, 2016 11:18 am

Shoot thats all this old Iron will do :?: Im trading mine in, thought It would do at least 100/double nickle. :shock:

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Rusty Bike
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Re: GL1200 Top Speed

Postby Rusty Bike » Wed Aug 10, 2016 7:59 pm

tbeiler... I'm gettin there, she's finally going together. Figured if I had a reference point I would know how mine measures up. I have seen some 130 MPH statements on the web but figured those kind of numbers were BS. I did get a pleasant surprise while cleaning the rear air shocks, a little sticker that says Progressive. This will go well with my new front springs... :D

CrystalPistol
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Re: GL1200 Top Speed

Postby CrystalPistol » Wed Aug 10, 2016 8:11 pm

Rusty Bike wrote:OK folks, mine is the SEi but I have heard that they are all rated the same HP. So, how fast will these things go? One up, flat road, no wind, with all plastic mounted. Top speed, how fast? Thanks


115-120 is all I'd be willing to bet on. These bikes are very dirty when it comes to air resistance. The saddle bags, travel trunk acting like dive brakes .... even a GL1800 will only hit about 125 under those circumstances when persued by a police car with certified speedo and Eagle radar telling the truth.
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Rednaxs60
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Re: GL1200 Top Speed

Postby Rednaxs60 » Wed Aug 10, 2016 8:42 pm

Here is an interesting sites. This one specifies 243 km/h - 151 mph: http://www.motorcyclespecs.co.za/model/ ... 0%2086.htm
"When you write the story of your life, don't let anyone else hold the pen"

Ernest

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julimike54
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Re: GL1200 Top Speed

Postby julimike54 » Fri Aug 12, 2016 12:13 pm

I wouldn't hold my breath for those kind of numbers. Besides if you look in manual and I think I saw a warning sticker, states do not ride above 80 MPH with bags & fairing. Course that's a cya :)
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roadwanderer2
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Re: GL1200 Top Speed

Postby roadwanderer2 » Fri Aug 12, 2016 2:07 pm

i know for a fact that my SEi will do 115 out on the interstate and thats fast enough for me :D

stuart.

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ekvh
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Re: GL1200 Top Speed

Postby ekvh » Fri Aug 12, 2016 8:18 pm

Had my hybrid 1200 with 1000 heads in a 1000 frame up to 195kph two up and there seemed to be quite a bit left. I had passed a car and my hand got stuck for a bit. Would love to take it somewhere where it's legal to see.

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roadwanderer2
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Re: GL1200 Top Speed

Postby roadwanderer2 » Sat Aug 13, 2016 6:41 am

ekvh wrote:Had my hybrid 1200 with 1000 heads in a 1000 frame up to 195kph two up and there seemed to be quite a bit left. I had passed a car and my hand got stuck for a bit. Would love to take it somewhere where it's legal to see.



agreed. i would like to do that also. run it flat out on an 8th mile drag strip just for s***s and giggles.

stuart.

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Re: GL1200 Top Speed

Postby Rusty Bike » Sat Aug 13, 2016 8:39 am

GL1200 with 1000 heads?? Tell me more please...
I feel if you got one of these up to 150 it would lift off. The way the fairing is built it looks like the line from below the headlight going back towards your knees, would create lift. I wonder if Honda did wind tunnel tests on these? The Vetter fairings look faster to me, not that I would change it.

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ekvh
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Re: GL1200 Top Speed

Postby ekvh » Sat Aug 13, 2016 9:33 am

No fairing, it's on a 1000. Frame raked adding a few inches of length and stability. This year I added a 1200 swingarm and 1500 final drive for another 3.5" length.

I doubt the claim that a stock 1200 could go 150mph. The speedometer I had on at the time I took it up was the type with a magnet on the front wheel. I have no idea as to if they stay accurate at higher speeds or not but common speculation is that the older cable types get pretty inaccurate at higher speeds. I can't find the data, but wonder if the redline in fifth gear would take you that fast. I used to have a chart with all the hearing differences over the years, can't find it anymore.

Saunders site has a sticky titled B-Girl with a lengthy discussion of 1000 heads on a 1200 block.

CrystalPistol
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Re: GL1200 Top Speed

Postby CrystalPistol » Sat Aug 13, 2016 9:39 am

roadwanderer2 wrote:i know for a fact that my SEi will do 115 out on the interstate and thats fast enough for me :D

stuart.

Well, my '85's speedometer is a full 10% fast these days. 66 indicated is 60 actual checked against both a Kustom Signals Radar I strapped on a few years ago when I was still on the force and it maintains to be reflected with GPS since. Current tires are MT90-16 front.

The first tire that was on it at 26,xxx when I bought it was a Elite GT 130/90-16 and while it "crosses, it was a slightly taller tire which meant trail was longer and tire rotated slower at same speed, the speedometer was closer to correct and the bike steered heavier going into a turn. When these bikes were built, 130/90-16 was the size used.

With it I could just get a finger in between the fender and tire tread. I have room for two fingers with the Elite IIs in the new size designation since. First time I put one on I noticed the difference when fitted and first ride I noticed it steered more "sportily" going into a turn, and it was on a later ride to Ohio when a buddy who had followed me before on rides asked why I was running so slow that year. He let me know I was 5-6 under the limit. That was mid-late '90s and soon as I got home .... I tried it with the radar out of my police car at 30-40-50-60-70- etc ..... and it held true to the 10% all the way up.

I recall hearing others talk years ago of Honda building in a 5% or so cushion to enhance the fun without hurting the license and loosing customers, etc ... never knew for sure .... the tire size changes account for a good 5% though.

An indicated 115 on my speedometer would be about 103.5 actual then.
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roadwanderer2
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Re: GL1200 Top Speed

Postby roadwanderer2 » Sat Aug 13, 2016 11:06 am

my 83 aspy, ever since i changed out the speedo gear and housing, its been 3 mph faster than its actually going, and i had it tested by police radar to prove it. i don't mind that, at least i know if im doing the posted speed limit, i'll never get a speeding ticket :).

stuart.

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Re: GL1200 Top Speed

Postby tbeiler » Sat Aug 20, 2016 9:40 pm

I got the 86 Aspy up to 165 kph, For you American friends thats 102.5 mph with 2 up.
Still had more throttle left, but backed off, this was already pdf (pretty damn fast)

Got my carb synchro kit in the mail today, can't wait to synchronize the carbs, and see how performance improves.

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Re: GL1200 Top Speed

Postby Rusty Bike » Tue Sep 13, 2016 7:15 pm

OK, I was on I-80 this morning. Not a car in sight so I opened her up (SEi), flat road new pavement. 121 MPH was all she wrote. There was no wind but bike buffeted around some at that speed. Felt solid at 90 MPH. Seems to be running good at higher RPM's Pulls strong. Still a little bulky at low RPM. I'll work on that.

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roadwanderer2
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Re: GL1200 Top Speed

Postby roadwanderer2 » Tue Sep 13, 2016 7:29 pm

yeah, I-80 can be a nice run for a bike. i can do the same thing down here on I-75 and or I-40 for about 5 or so miles. i've had my SEi up to 115, and your right, at that speed the bike does get a little "unruly". these older wings like to hit the rev limiter. they do seem to run nice between 80-90 mph. i "normally" keep mine running between 70-80 mph.

stuart.

tbeiler
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Re: GL1200 Top Speed

Postby tbeiler » Tue Sep 13, 2016 8:06 pm

Carbs have been synched for a few weeks now and it runs fantastic.
190 km/hr or 118 mph. Wow, can this baby fly.

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roadwanderer2
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Re: GL1200 Top Speed

Postby roadwanderer2 » Tue Sep 13, 2016 8:51 pm

tbeiler wrote:Carbs have been synched for a few weeks now and it runs fantastic.
190 km/hr or 118 mph. Wow, can this baby fly.


oh yeah, these older wings do have some "get up and go" to them especially when they are fine tuned. i can't wait to get mine back up and running tomorrow after all this work im doing to it, but im gonna take it "easy" on her for the first hundred miles or so to make sure its running good enough to do some "interstate speeds"

stuart.

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Rednaxs60
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Re: GL1200 Top Speed

Postby Rednaxs60 » Tue Sep 13, 2016 11:31 pm

tbeiler wrote:Carbs have been synched for a few weeks now and it runs fantastic.
190 km/hr or 118 mph. Wow, can this baby fly.


I thought you were staying off the big highways.

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Re: GL1200 Top Speed

Postby tbeiler » Wed Sep 14, 2016 7:43 am

No way on the big hi ways Ernest. There are some great country roads with little traffic and straight as an arrow here in southern Ontario, that's the only place I would even dare to get up this fast, and I probably won't do it again.




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