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Wayne S.
Wayne S., Motorcycle Mechanic
Category: Motorcycle
Satisfied Customers: 1255
Experience:  Experienced and Licensed Motorcycle Mechanic - all sizes and brands welcome.
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01 Bombadier Traxter 500 voltage regulator gets hot after 10

Customer Question

01 Bombadier Traxter 500 voltage regulator gets hot after 10 minutes or so bike shuts down sometimes will start with choke on but only idle just replaced voltage regulator same problem
Submitted: 1 year ago.
Category: Motorcycle
Expert:  Wayne S. replied 1 year ago.
Poor connections make regulators run hotter than normal
although normal is pretty hot on a full wave shunt rectifier.

Mpem or computer might have loose connectors (behind fuel tank)
Wiring harness's are known to corrode and have flakey connectors.
Loose contacts in the ignition switch.
Stator yellow wires connector loose or corroded.

Bad grounding on regulator body to frame.
Other bad grounds, battery to frame etc.

The regulator has to shunt or flow all excess current to ground.
This makes it run very hot but excessive current draw
because of poor wiring connectors can affect it also.

Check the charging voltage on the battery and make sure
the battery is not weak. Voltage should not be over 14.5 DC
The battery absorbs current to balance the system
so it needs to be in good shape.

Larger wires with solid or soldered connections can help lower heat
in the regulator.

The main red power wire from ignition switch to mpem and fuse
box is joined inside the harness. A known trouble spot for
poor connection and corrosion.

Newer regulators on some machines are now running cooler
due to using a mosfet transistor design instead of older
scr shunt rectifiers. They switch on and off instead of
running full power from the stator all the time.
This keeps the stator and the regulator cooler.
No more grounding the heat to the frame and the rectifier
heat sink.

Customer: replied 1 year ago.

Is this a common problem with bombardier did not have much luck searching the net for this

Can you send me the wiring schematic that would show witch wires to run down behind fuel tank

Expert:  Wayne S. replied 1 year ago.
The problem with regulators is common as they run so hot
that any minor problems in the wiring can amplify that heat.
As bikes age the wires and connectors need cleaning
and often repair or replacement.

The mpem (multi purpose electronic module) has two big connectors,
You should be able to see them near the fuel tank.
You might have to move the tank a bit to get at them.
Sometimes they rub on the tank which is not great either.
Picture of the mpem module:

Expert:  Wayne S. replied 1 year ago.
Also, here is a link to wiring diagrams for you:!ctRSgIwB!iZCplRpUGDYKrJKe0lmydtoIHS63WilQDQT3lHaeCGc
Customer: replied 1 year ago.

This site is pissing me off can't send expert anymore questions

Customer: replied 1 year ago.

Ok let's try this forget about voltage regulator as heat is normal and new one didn't help For months now the kids have been able to ride it slow and easy and it would run for a long period of time. but if you start riding it faster then would shut down. Pull the choke and start back up on full choke after few seconds rpm would raise and then let off choke and run normal till you start going fast again. Yes it does act like starving for gas if you hold the throttle normal it dies but if you hold full throttle it will take off for a 1 / 4 mile or so then start back firing and die. If is starving for fuel how does it take off like a bat outta hell for that amount of time. Problem is gradualy getting worse. Is it possible to have a phone call instead of all the typing

Expert:  Wayne S. replied 1 year ago.
Sounds like a sticky carb float or fuel tank air vent
is creating a vacuum in the tank.
Check fuel supply to carb.
Check tank for vacuum or pressure when cap is removed.
Clean carb, check for sticky float or stuck float needle valve.

I do these questions when my job allows me time. I cannot
do phone calls but can opt-out if you want to leave your
question open for others?
Expert:  Wayne S. replied 1 year ago.
Also check fuel strainer in tank and follow fuel line to the
vacuum fuel pump unit. It has a diaphragm that
should hold vacuum or pressure. If it leaks you may
not get enough fuel.
If fuel supply looks good then check carb float.
Customer: replied 1 year ago.
Relist: Other.
Expert is on point but have tried these suggestions and no results
Expert:  Wayne S. replied 1 year ago.
Fuel tank lines may have a check ball that could get stuck.
This might cause fuel problems, possibly overpressuring
of the float bowl and creating odd performance issues.