Hi, I just purchased a Massimo MU500 that we are going to use in the North Georgia mountains.
After the first couple of test drives it seems a) somewhat underpowered and loud as hell.
So wondering if I switched out the mud tires with something with smaller tread if that would maybe help?
Also I found a muffler replacement called the “silent rider atv silencer” and wonder if that would help with the noise without killing power.
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1. What does the pressure switch (see pic) with one wire going to it do? I don't see an oil pressure idiot light so it must supply ground when seeing no oil pressure to either the fuel pump or the ignition. Does anyone know which system it interrupts? My fuel pump is bad so I am converting to a vacuum fuel pump but don't want to loose the no oil pressure warning feature. I could wire this pressure switch to the over temp light on the dash since I replaced this with a digital temp guage so the over temp dash light is unused at the moment.
2. Inside the crankcase, under the oil pump cover, sits a spring over a steel ball. See pics. This must regulate oil pump pressure. It seems odd to me that there is a gap between the spring and the oil pump cover. Does this gap seem correct? I guess that it could be to insure some zero pressure flow before it gets reduced by the spring???? I don't recall ever seeing another set up with a gap though.
Many thanks, Mike
By John Mason
Thanks for the forum.
I am currently installing a turn signal and horn kit on a Mule 2500 that was gifted to the local ranch owner. His health is not so great, and other than a car, he has no other way to get into town. The driveway is a mile long...
Attached are some photos. The prior owner disconnected the parking brake light grounding/indicator cable. I fixed it and reconnected it (shown in photo). Following the wiring harness, there is a 6-pin block (see second photo) up front, nothing plugged into it. I have what I think, is a fairly accurate wiring diagram.
I cannot find the VIN anywhere on the vehicle. I have no paperwork on it and neither does the owner. We know who owned it previously but he doesn't have paperwork on it either. I have looked NUMEROUS places, and googled it.
I do not know the year.
There does not seem to be any indicator light for the parking brake. I think the light was physically removed from the dash (see third photo).
What parts are missing? What are they named/part numbers if you have them?
What I have done so far:
Fixed the parking brake switch
Fixed the brake lights, the wiring in the back was pulled out, cut, a mess. (fixed)
Added a third center high brake light, tying it to the wiring harness. Positioned just below the air intake. (added)
Added bright red LED strip lights, at the inner side of the rear downtubes, to be used later for the turn signal indicators.
Ready to order a $15 steering column strap-on switch for hazards and turn signals.
Parking brake switch (fixed)
What are these? They were bundled up underneath the dash with a ziptie. The beige block has the red wire return from the parking brake.
Wiring diagram. These seem close to the existing vehicle.
Dash photo. So you can see what is missing and let me know.