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I'm interested in running an extra ground wire from the regulator/rectifier to the battery or the frame. I've read a couple guys on here that says it can help cure a bouncy tach and just improve reliability. My question is where to I attach the wire to on the regulator and should I run it to the battery or to where the battery attaches to the frame?
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1979 XS1100SF 37000km
Green Dyna Coils
Stainless Brake Lines
1973 CB100
kevXS -
What would keep you from polishing up the three already existing ground wires attached to regulator mount bolt, and bolt mounting surface of regulator? Your above mentioned grounding locations may need a spiffin' up alsoOriginally posted by kevxs View Post
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Would even consider removing and cleaning internals of the KILL switch.......and ALL plugins' behind fuse panel, ect....ect.....ect..Last edited by motoman; 06-17-2015, 04:08 PM.81H Venturer1100 "The Bentley" (on steroids) 97 Yamaha YZ250(age reducer) 92 Honda ST1100 "Twisty"(touring rocket) Age is relative to the number of seconds counted 'airing' out an 85ft. table-top. -
Over on the GS forum, a single ground source is stressed.1979 XS1100F
2H9 Mod, Truck-Lite LED Headlight, TECHNA-FIT S/S Brake Lines, Rear Air Shocks, TKAT Fork Brace, Dyna DC-I Coils, TC Fuse Block, Barnett HD Clutch Springs, Superbike Handlebars, V-Star 650 ACCT, NGK Irridium Plugs, OEM Exhaust. CNC-Cut 2nd Gear Dogs; Ported/Milled Head; Modded Airbox: 8x8 Wix Panel Filter; #137.5 Main Jet, Viper Yellow Paint, Michelin Pilot Activ F/R, Interstate AGM Battery, 14MM MC, Maier Fairing, Cree LED Fog Lights.Comment
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Hmmmm........didn't know that the volts divided, searching out additional groundsOriginally posted by IanDMacDonald View Post
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81H Venturer1100 "The Bentley" (on steroids) 97 Yamaha YZ250(age reducer) 92 Honda ST1100 "Twisty"(touring rocket) Age is relative to the number of seconds counted 'airing' out an 85ft. table-top.Comment
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The bouncy tach is due to the 35 year old electrical components inside. I've never had one that worked perfectly.
Yamaha should have never built one that ran off of the alternator pulses. Bad idea.Greg
Everybody is a genius. But if you judge a fish by its ability to climb a tree, it will live its whole life believing that it is stupid.”
― Albert Einstein
80 SG Ol' Okie;79 engine & carbs w/pods, 45 pilots, 140 mains, Custom Mac 4 into 2 exhaust, ACCT,XS850 final drive,110/90/19 front tire,TKat fork brace, XS750 140 MPH speedometer, Vetter IV fairing, aftermarket hard bags and trunk, LG high back seat, XJ rear shocks.
The list changes.
Comment
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Hmmmm......The Bentley's tach has not so much as wavered........guess I only got two more yrs. before it makes a liar outa' meOriginally posted by BA80 View Post.
81H Venturer1100 "The Bentley" (on steroids) 97 Yamaha YZ250(age reducer) 92 Honda ST1100 "Twisty"(touring rocket) Age is relative to the number of seconds counted 'airing' out an 85ft. table-top.Comment
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Have you checked the accuracy? I have one that doesn't bounce but it kinda flattens out around 4 - 5 k.Greg
Everybody is a genius. But if you judge a fish by its ability to climb a tree, it will live its whole life believing that it is stupid.”
― Albert Einstein
80 SG Ol' Okie;79 engine & carbs w/pods, 45 pilots, 140 mains, Custom Mac 4 into 2 exhaust, ACCT,XS850 final drive,110/90/19 front tire,TKat fork brace, XS750 140 MPH speedometer, Vetter IV fairing, aftermarket hard bags and trunk, LG high back seat, XJ rear shocks.
The list changes.Comment
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I would like to know their reasoning.Originally posted by IanDMacDonald View PostNathan
KD9ARL
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1978 XS1100E
K&N Filter
#45 pilot Jet, #137.5 Main Jet
OEM Exhaust
ATK Fork Brace
LED Dash lights
Ammeter, Oil Pressure, Oil Temp, and Volt Meters
Green Monster Coils
SS Brake Lines
Vision 550 Auto Tensioner
In any moment of decision the best thing you can do is the right thing, the next best thing is the wrong thing, and the worst thing you can do is nothing.
Theodore RooseveltComment
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Extra Ground
Any ground other than a direct battery ground is a poor ground.
Run another wire from the regulator ground directly to the battery. You should improve other chassis grounds in this manner.1981 XS1100H Venturer
K&N Air Filter
ACCT
Custom Paint by Deitz
Geezer Rectifier/Regulator
Chacal Stainless Steel Braided Brake Lines
Chrome Front Rotor & Caliper Covers
Stebel Nautilus Horn
EBC Front Rotors
Limie Accent Moves On In 2015
MikeComment
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Going into what I work on every day, a single ground is best in a perfect world. The connections, wires, crimps, and all are getting old on the bike, so another wire would not hurt. I put a ground wire, #8, directly from the negative of the battery to the engine. I also cleaned up ALL the ground connections on the Quail bike, and I still have a few problems to work out.
Grounds NOT all going to one location will give you what is known as a ground loop. What this does to the bike is drop the voltage potential in some of the circuits. In the radio's I work on, it could result in 200V between a case and the earth ground. Yeah, it has been done, and there are people with the scars from the electrical burn to show it.
Yamaha uses one of the bolts on the reg/rec as a main ground for the harness. If you put in a wire, go from that bolt to the negative on the battery. But, don't forget to check the engine case to the battery. With the engine running, and the DVM on DC Volts, touch one side to the negative on the battery, and the other to a clean metal part of the engine. the reading should be 0.0, anything else, and you have a ground problem.....Ray Matteis
KE6NHG
XS1100 E '78 (winter project)
XS1100 SF Bob Jones worked on it!Comment
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Follows to 8.5K just like it did when new.......and hides behind the fuel gauge with a missed speed shift, so yup, I'd say it's 'golden'Originally posted by BA80 View Post. BTW, speedo is still spot-on also, and the bike will still only run 85mph
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81H Venturer1100 "The Bentley" (on steroids) 97 Yamaha YZ250(age reducer) 92 Honda ST1100 "Twisty"(touring rocket) Age is relative to the number of seconds counted 'airing' out an 85ft. table-top.Comment
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I think I would rely on some other method of checking ground than the ability of your tachometer to peg itself during a botched shift!Skids (Sid Hansen)
Down to one 1978 E. Stock air box with K&N filter, 81H pipes and carbs, 8500 feet elevation.Comment
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Think kevxs was the one questioning a possible issue SidOriginally posted by skids View Post.When questioned, just commented that the tach on my Venturer has worked perfectly from when I bought the bike new
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81H Venturer1100 "The Bentley" (on steroids) 97 Yamaha YZ250(age reducer) 92 Honda ST1100 "Twisty"(touring rocket) Age is relative to the number of seconds counted 'airing' out an 85ft. table-top.Comment
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Hey Greg,Originally posted by BA80 View Post
IF Yamaha wanted to use an electronic tach, why they didn't just design one to work off of the ignition pulses instead of the ALT is beyond me!? But perhaps they were trying to use a source that was a stronger signal, a lot more volts on one leg/phase of the alt than the trigger side of the coils.
T.C.T. C. Gresham
81SH "Godzilla" . . .1179cc super-rat.
79SF "The Teacher" . . .basket case!
History shows again and again,
How nature points out the folly of men!Comment
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No need to explain, I know exactly what you said! 8-D7Originally posted by motoman View PostThink kevxs was the one questioning a possible issue Sid.When questioned, just commented that the tach on my Venturer has worked perfectly from when I bought the bike new.Skids (Sid Hansen)
Down to one 1978 E. Stock air box with K&N filter, 81H pipes and carbs, 8500 feet elevation.Comment
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