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Author Topic: The only downside of the Koso  (Read 1853 times)

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Offline DanFromVegas

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The only downside of the Koso
« on: November 16, 2018, 06:23:32 pm »
Yamaha screwed up. They did't put a baffle around the low oil light sending unit. Adding to that they installed the unit at the front of the crankcase so it has no oil at the unit when you accelerate. Apparently to cover for their mistake they put some kind of delay in the idiot light. Unfortunately the Koso doesn't have that. Any time I accelerate at full throttle the low oil light comes on. Yes, my oil is full. Yes, I know how to check it. Yamaha even has a caution in the owner's manual telling you that in certain situations you can get a false warning. So, can the light be deactivated in the Koso? Not as far as I can tell. Ok, I'll just cut the wire from the sending unit. Now the light blinks all the time. Ok, how about a dead short to ground? Nope, still blinking. Before I reconnect my red Open Throttle warning light, has anyone found a workaround for this? Maybe a resistor in the line before I ground it?


Bolt on!

Offline josh

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Re: The only downside of the Koso
« Reply #1 on: November 16, 2018, 10:11:28 pm »
Iíve read  others say that it comes on with factory unit, mine never did. But with the Koso is has a few times. Wonder if some sending units are more sensitive then others?

Offline DelawarePete

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Re: The only downside of the Koso
« Reply #2 on: November 17, 2018, 12:47:16 am »
I have beat the living shit out of my Bolt for over 5 years and never once did that light come on for me. 
Grow a beard

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Offline SCRBen

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Re: The only downside of the Koso
« Reply #3 on: November 17, 2018, 01:01:38 am »
Put slightly more oil in. First time I changed the oil after installing the Koso, the oil light flickered on for maybe 1-2 mins at the start of a ride. No big deal - soon went off, as it circulated. After a dealer service, light has never come on again. My thoughts? They put in slightly more oil than I did - not overfull though.....I still check regularly.
Ben

Offline bedheadjulian

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Re: The only downside of the Koso
« Reply #4 on: February 28, 2019, 04:08:15 pm »
Just a quick side-note for anyone wondering about the dangers of over-filling the oil... So most of you already know this, but the reason you don't want to overfill the oil is that if the oil level is too high it can get "whipped" by the crankshaft and then your oil gets foamy and stops circulating properly,  hence no longer providing proper lubrication.
 8)
-J

Offline SCRBen

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Re: The only downside of the Koso
« Reply #5 on: March 02, 2019, 03:59:39 am »
Like i say......not overfull.
Ben

Online srinath

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Re: The only downside of the Koso
« Reply #6 on: March 03, 2019, 08:13:55 pm »
You actually should use that full throttle and light on as an indicator that things are all normal. It goes away when you are at steady speed or are shutting the throttle to shift etc etc, lets just say you get the first warning and not subject to the "delay" Yamaha put in that the rest of us have to deal with.
Cool.
Srinath.

Offline A Scamm

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Re: The only downside of the Koso
« Reply #7 on: March 03, 2019, 08:44:53 pm »
While running the stock meter I never saw the light come on. After I switched to the Koso meter, in hard accelerations itís a steady light until the bike stabilizes to a constant speed. After that I donít see it again.

Unless the light starts staying on for longer or doing some other crazy stuff, Iím just gona leave it be lol

Offline arealjighead

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Re: The only downside of the Koso
« Reply #8 on: March 11, 2019, 05:55:28 pm »
^^ I never had it come on with the stock speedo either. After switching to the Koso it did start coming on every now & then. So I added a little oil thinking that was the problem & it still came on from time to time. But after my last oil change it hasn't came on since. I don't know what made it stop because I used a different viscosity. Could have been that, the level, or that I don't get on it like I did when I first got the bike.

Offline Mutiny

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Re: The only downside of the Koso
« Reply #9 on: March 12, 2019, 04:54:34 am »
What oil did you change to? I also have this problem with my koso

Offline arealjighead

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Re: The only downside of the Koso
« Reply #10 on: March 12, 2019, 08:26:40 am »
What oil did you change to? I also have this problem with my koso

I put Castrol 4T 20W 50 in last time. But like I said I'm not sure if it was that, the level, or that I'm just taking it easy on the bike now. But it hasn't came on since

Offline E

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Re: The only downside of the Koso
« Reply #11 on: May 12, 2020, 05:09:26 pm »
While running the stock meter I never saw the light come on. After I switched to the Koso meter, in hard accelerations it’s a steady light until the bike stabilizes to a constant speed. After that I don’t see it again.

Unless the light starts staying on for longer or doing some other crazy stuff, I’m just gona leave it be lol

i just installed my KOSO meter (i have had exact same circumstances)
basically - OIL light comes on every time a accelerate for the first 5 minutes
then it seems to stop - or only come on with aggressive acceleration
KIND OF A BUMMER - i do not like to see the light (PERHAPS i should interpret it as an Economical, Save the Planet - stop accelerating so hard - ha,ha) .....first 5 minutes it just keeps coming on
« Last Edit: May 12, 2020, 05:14:06 pm by E »
E - 1st John 4:10

Offline Sdaniels

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Re: The only downside of the Koso
« Reply #12 on: May 13, 2020, 08:12:07 am »
Same as others, I never saw the oil light come on with the stock gauge.  Comes on all the time with the Koso, on hard acceleration.  I've even seen it with hard braking.  I'm going to add a bit more oil to see if it helps.  For those that have done this, are you adding a certain amount or are you adding to see a specific level increase on the dipstick?
2015 C-spec

Online srinath

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Re: The only downside of the Koso
« Reply #13 on: May 13, 2020, 09:02:28 am »
Koso has a dipstick sensor ? Cos bike only has sight glass.
BTW Yamaha is famous for doing oil level - going back to those 80's virago's would even when filled with 2X the oil would light up the oil level light when cold. The stock gauge is just fitted with some kluge sensor delay or something.

Cool.
Srinath.

Online srinath

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Re: The only downside of the Koso
« Reply #14 on: May 13, 2020, 10:40:03 am »
Y'know those gauges that bolt into the oil galley and read pressure are easy to find and install in most Honda's and Suzuki's as far as I know. That thing on a 2 and 4 cyl air cooled Suzuki is under the round cover by your right toe. There is a sending unit which you replace with a sending unit for a pressure gauge and wire that in. Honda is easy to install a mechanical gauge that sits right there - yea you'd catch your foot on it on a bad day.
Why is that not on 1/2 the yamaha's of the 80's cos IMHO its the worst setup - something that had been messes up for 40 yrs.
BTW is the oil pump in this bike still a chain drive deal driven by a tiny chain with no tensioner and barely looks like it would make it ?
Now something to be said for good engineering is that - or is that terrible engineering - not sure - those virago's rarely ever died from oil pump or oil chain failure - cos the starters died long before that, and if you fix that you're likely to get sick of cleaning its carbs you would need the strength of a grizzly and the finger size of a baby to get out and back in.
Oh yea then electrical problems, starter clutch problems etc etc would take it out. But I have seen those with 150K+ miles too.
Cool.
Srinath.