bypassing clutch switch...

T

taoster

Well-known member
sorry if this has been talked about(which i'm sure it has). looking up "clutch switch" in the search bar just brings up a bunch of unrelated threads..

i have a yamaha bolt. I bought a new clutch lever which doesnt come with the clutch switch. I've read multiple different forums about people saying the bike runs fine without the clutch switch, you can start it in gear so just watch out for that. I hear others say it messes with the fuel MAPS and the ECU, and others say the bike dies at low RPMs....

so what REALLY happens when you twist the 2 clutch switch wires together or simply disconnect the clutch safety switch?
 
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J

JimE

Rider
Whomever told you it affects fueling (or whatever) tell them to pass me some of whatever their smoking. Must be some good shit.

It's just an interlock. Seriously. Start button is disabled if not in neutral or clutch switch satisfied. Makes a loop to enable starter. That's it. If they break I tend to wire across them. One for the BMW was like $80. Eff that I can deal....
 
HadesOmega

HadesOmega

Well-known member
On my Yamaha warrior 350 quad there was a clutch safety switch and if it thinks the clutch is pulled in it will limit the revs. That's why you bypass all the safeties.

I don't know about a Bolt though.
 
Maddevill

Maddevill

KNGKAW
JimE said:
Whomever told you it affects fueling (or whatever) tell them to pass me some of whatever their smoking. Must be some good shit.

It's just an interlock. Seriously. Start button is disabled if not in neutral or clutch switch satisfied. Makes a loop to enable starter. That's it. If they break I tend to wire across them. One for the BMW was like $80. Eff that I can deal....
Click to expand...

On some bikes it does. For example, on the later SV650 it alters fuel map for start up.

Mad
 
M

motomania2007

TC/MSF/CMSP/ Instructor
taoster said:
I picked up a RSC clutch lever for an easier pull on the clutch lever. I've been having cramping issues in my left hand and riding for more than 15 mintues my left hand gets sore.
Click to expand...

I suggest there are several better alternatives that don't eliminate the clutch switch.

Including:
Confirming you are sitting on the bike correctly
Confirming the handlebar bend is correct for you
Adjusting the lever correctly
There are a few other issues possible as well.

I mention these because these issues are almost always screwed up when a rider reports wrist issues.
And most riders and mechanics do not know how to set these things correctly.
 
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B

bobl

Well-known member
So wire the switch and see. It's not like launching a rocket, it's just two wires. On some of the gsxr Suzukis, it definitely alters the map, retarding the timing for starting. Try it and see if there is a difference. You can talk it to death, or try it. If it does result in an altered map, it not difficult to wire it to a relay that is operated by the starter circuit.
 
ctwo

ctwo

Merely Rhetorical
my bike gives it a little juice when I let the clutch out, so it does not stall as easily at low RPM when taking off.
 
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mwc

mwc

Sombiscuit
When I put an RSC perch/lever on my old stunt Grom, I jumped the two blade connectors with I believe a 10a fuse, that blew after a little riding, but I think it was a 15a that I replaced it with and that did the job. Covered it in some heat shrink and zip tied it to the horn/indicator harness.
 
stangmx13

stangmx13

not Stan
You may be able to leave the clutch switch connected to the wires (but not the lever) and always start the bike in neutral.
 
T

taoster

Well-known member
motomania2007 said:
I suggest there are several better alternatives that don't eliminate the clutch switch.

Including:
Confirming you are sitting on the bike correctly
Confirming the handlebar bend is correct for you
Adjusting the lever correctly
There are a few other issues possible as well.

I mention these because these issues are almost always screwed up when a rider reports wrist issues.
And most riders and mechanics do not know how to set these things correctly.
Click to expand...


i wish it was as simple as my setup. My cramps are related to a injury i had years ago that i never got checked out.
 
T

taoster

Well-known member
UPDATE:

so i unplugged the clutch switch wires and went for a ride for a couple minutes.. it "sounded" different.. performance wise, i couldn't tell.

Then I connected the 2 wires together, and it "sounded" like what i'm used to it sounding like.. so.. i guess i will run it like this until something happens.

Is this a "placebo" effect in my head or maybe there really is a difference when simlpy unplugging the clutch switch wires compared to connect the 2 wires together..

Any additional input would be grateful. Once again, this is a 2014 Yamaha Bolt. Thanks.
 
M

motomania2007

TC/MSF/CMSP/ Instructor
taoster said:
i wish it was as simple as my setup. My cramps are related to a injury i had years ago that i never got checked out.
Click to expand...

Have you had someone knowledgeable actually look at your set up with you on the bike?

Just like proper set up can help, improper set up can hurt.
 
T

taoster

Well-known member
motomania2007 said:
Have you had someone knowledgeable actually look at your set up with you on the bike?

Just like proper set up can help, improper set up can hurt.
Click to expand...

i appreciate the thought, but i've been riding for 12 years, and i didn't have any issue until after i sustained that injury.
 
T

taoster

Well-known member
okay so i tried different methods:

Rode with the clutch switch unplugged: sounded different and didnt seem to have as much torque.

Rode with the clutch switch connected together: sounded normal, but exhaust started popping on deceleration, and bike was kinda of spotty and jerky while holding it at a steady RPM..

finally, i put my original clutch perch and lever back on, connected the clutch switch and it rides smooth as can be..

So, i've learned the hard way, YES, bypassing the clutch cable DOES effect fuel maps incase anyone else comes by this thread.

This was on my 2014 yamaha bolt.
 
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