These stock gauges are fine for everyday riding,but the accuracy/dependability of them suck. Who knows of anything aftermarket that would be accurate? I have tested mine against GPS and they read fairly accurate,but the bouncing needles make it impossible to really know whats going on. I have cleaned and lubed,cleaned and lubed.I even put on a brand new speedo cable.Still have spastic needles. Any suggestions,please?
Watch these crazy things(excuse the horrible audio)
Hmm. I don't see any wonkiness. Are you talking about the rpm gauge at idle? If so, I think that your motor really IS probably jumping a little at idle. I doubt it's the cable binding up or the gauge inaccuracies.
Turbos, Hondas, 4-bangers, what could go wrong?
Shiny: [...] Considering the weather you've had to put up with I'd say you get an Iron Butt award and a Frozen Nipple trophy to go along with it. First time I've ever posted the word nipple... it ends here.
Y'all dont see it? The speedo climbs to 70,falls back to 55 then jumps to 85 or so. Maybe i'm just seeing things...
O.K. seen it that time since you pointed ,My guess and most likely your tire skipped / floated ,the ground is wet ,everyone of my bikes floated a lil at 90 and bad over 100 and holding in there.On dry ground.
1977 CB750 F2 Super Sport
<LET THOSE WHO RIDE DECIDE><RIDE TO LIVE-LIVE FOR JESUS>
Native American from central Cal, Kickstand UP in S.W.Missouri,
I checked into modern, digital gauges, several years ago, for similar reasons. They should all be very accurate, considering they're all computerized. The snag I saw, was that they were all designed to hook into the bike's onboard computer -- 79's don't have computers... The speed seemed to be easy, as it used a magnetic sensor, and a permanent magnet attached to the rim. It was the tachometer that would have been difficult to interface. They did not seem to offer anything like a pick-up coil, to clamp around a spark plug wire, to send pulses to the tachometer.
Meh! I could be wrong, as it has been a few years since I looked into the topic. They make several all-in-one units, with trip meters, mileage calculators, etc. A few were quite fetching to look at, and the prices -- well, they were above my pay grade, for the most part, "But, Honey, it's a necessity -- the bike won't run without It!..." Duck and run for cover!
In the end, I just decided to live with the jumping needles, watching long enough (on a straight-away) to see the upper, and lower, swing limits, then I would calculate the middle, in my head, and go with that. YMMV. Cheers!
1979 CB750K (sold, 2012, but not forgotten)
1983 Kawasaki 440 LTD Belt Drive (sold, 2011)
1993 Kawasaki Voyager XII
Since the RPMs seem to climb, and the speedometer drops off, is it possible the front wheel may be off the ground? Also, the pavement was wet: maybe hydroplaning?
If it's doing this on a bone-dry road, then there may be something funny going on in the speedo drive, the cable, or the speedometer itself. Not much else going on in there.
Doing the ton in 4th gear? Impressive. Love the sound of that motor.
Luke M
Used to have a 1979 CB750L, sold it as a parts bike, now riding a slightly modified 1984 VT700C. Network/Field Engineer. Central OH, USA, Earth, Sol System, Milky Way Galaxy, Universe.
No,the front tire is definitely on the ground. It does it the same no matter what the road conditions are.If i ride around normal everything does just fine. But when i accelerate quickly that is when they start jumping.
Sarge,I have noticed the same things offered as you. MSD has ways of figuring out the tach,but once done it would cost $4-500 or more. I dont know,I guess they make nice handle bar decorations,though.
That was your engine catching a breath. I also wish my speedometer was that steady.
TOOLS
Life is not about the number of breaths, you take, but the moments that take your breath away.
I don't have an anger problem. I have an idiot problem. Hank Hill
Never confuse education for intelligence.
Happiness is a belt fed weapon.
I just can't imagine what could go wrong.
No fire? No explosions? So whats the point of your story?
Those who are too smart to engage in politics are punished by being governed by those who are dumber. ~Plato
It couldn't be done, but the darn fool didn't know it, and did it anyway.
We all got problems. Ksharp
I like vintage bikes because they take me away from the clutter of technology that I work with everyday and back to a simpler time of mechanical elegance and simplicity.. "ninadm"
Darkwing Duck: The worst part of public transportation is the Public.
"That is awesome shit there" Re-Run
"Fear nothing, attack everything" Eric Berry
" Oh, you read that on the internet? Clearly it IS a massive problem. Of course it CAN’t be normal operation."
1976 CB 750-A X 2
1977 CB 750-A X 4
1977 CB 750-K
1976 CB 750 F
1981 CB 750
1966 Kawasaki SG 250
1981 KZ 750 LTD
1973 CB 350
1979 CM 185 Twinstar
1982 Honda XL 80
South of Eden (Kansas City MO)
When I had them apart to put the overlays on I cleaned the inner workings with a soft bristled sign painting brush and oiled them with light oil like I use in my air tools. It was Marvel Mystery Oil actually.Maybe yours just need a cleaning? Catching a breath,huh?
Locked
