New part from Yamaha

[jlhughes750]

Anyone else hear about the new kit from Yamaha for the lighting system. From what I heard u can take the lights off and not have to worry about fryin batterys. I think I heard something about rewiring something?????????

Can anyone add any info???? Anyone else hear about this??

[250RXCrider]

A friend of mine has one on his XC YFZ. It is some kind of resistor kit, where you can remove the headlights and not run into the charging problems. He ordered directly from the local Yamaha dealer and I believe your dealer should have all the information you need. He has not experienced any problems since installing the kit.

Later,

-JP

[Splatter Matter]

good finish 3rd over all in d6. if i read it right. here is the info jeff


Unique Charging System Characteristics - Yfz450
The YFZ450 Charging System is designed to
supply at low to medium engine rpm a maximum
charging rate with the headlights in the
ON position. Under some conditions (e.g., low
speed with cooling fan running frequently or
continuous high rpm riding), it may be necessary
to ride with the headlights in the ON position
continuously to maintain a fully charged
battery.
If a customer complains of the battery discharging
while riding, first check the condition
of the battery.
NOTE: If improperly charged or boost charged,
these compact batteries could overheat and
become permanently damaged. To prevent
overheating, charge the battery using a low
output charger (e.g., Optimate III, ACCOPTIM-
AT-E3), and test the battery to make
sure it is in good condition. Next, Check the
output of the charging system.
To avoid mis-diagnosis, follow these procedures
and specifications in the order below:
1. Minimum key off (battery voltage must be
12.80 VDC).
• Voltage too low: recharge and load test
the battery.
2. Measure the battery voltage at idle. *It
should be 14.0 ~ 14.9 VDC before the cooling
fan starts to cycle ON and OFF.
• Voltage too low: check the stator coil
resistance. The correct specifications
are:
– Yellow to Ground = 0.22 ~ 0.60 ohms
– White to Ground = 0.29 ~ 0.84 ohms
– Out of Spec: replace stator assembly
• Voltage is too high: check wire continuity
(particularly the black wire which
should have continuity between the
Ground). The Yellow/Red wire should
have continuity between the lighting
coil and the regulator.
NOTE: If continuity checks good, replace the
regulator assembly. (Commonly, both headlights
are burned if the regulator has failed.)
• Voltage Okay:
–
–
–
NOTE: Do not check the battery voltage at
5000 rpm as explained in the Service Manual.
Charging output will decrease as rpm increases.
This is a normal characteristic of this
model.
*Since the system normally discharges anytime
the cooling fan is ON, all testing must be
done before the fan starts to cycle on and off.
Otherwise, the maximum measurable battery
voltage will be lower than 14.0 VDC.
SUBJECTS: 1. Unique Charging System Characteristics - YFZ450
2. Introducing YFZ450 Charging System Resistor Kit -
Resistor Kit for Competition Usage
3. YFZ450 Resistor Kit Installation Instructions

Check the radiator for blockage and
correct as required.
Advise the customer to use the key
switch to turn the engine off. Only
use the engine switch (on the handle
bar) in an emergency.
Advise the customer to switch the
headlights ON to increase the charging
output.
Introducing YFZ450 Charging System Resistor Kit -
Resistor Kit for Competition Usage
Symptom:
As explained in the previous subject (page 1),
the YFZ450 Charging System is designed to
supply at low to medium engine rpm a maximum
charging rate with the headlights
switched to the ON position. If the headlights
are removed for competition use, the unit may
experience battery discharging.
Remedy:
Install the YFZ450 Resistor Kit. The kit contains
a ceramic resistor which takes the place
of the headlights to maximize the charging
rate, plus it provides a higher temperature fan
thermoswitch to minimize current draw. The switch is
located sitting on the bike the upper right switch
NOTE: This higher temperature is still low
enough to not cause engine overheating.
The kit is optional for competition use and warranty
does not apply. The kit was developed to
allow maximum charging and reduce battery
load.
____part#________5TG-REGST-KT-00 part # for kit

thanks bc_____

http://www.imagestation.com/picture/sraid139/p0bc1e8ccf76ef5d0a1d6df25b871b517/f710824d.jpg

[SRH]

Originally posted by Splatter Matter
good finish 3rd over all in d6. if i read it right. here is the info


Unique Charging System Characteristics - Yfz450
The YFZ450 Charging System is designed to
supply at low to medium engine rpm a maximum
charging rate with the headlights in the
ON position. Under some conditions (e.g., low
speed with cooling fan running frequently or
continuous high rpm riding), it may be necessary
to ride with the headlights in the ON position
continuously to maintain a fully charged
battery.
If a customer complains of the battery discharging
while riding, first check the condition
of the battery.
NOTE: If improperly charged or boost charged,
these compact batteries could overheat and
become permanently damaged. To prevent
overheating, charge the battery using a low
output charger (e.g., Optimate III, ACCOPTIM-
AT-E3), and test the battery to make
sure it is in good condition. Next, Check the
output of the charging system.
To avoid mis-diagnosis, follow these procedures
and specifications in the order below:
1. Minimum key off (battery voltage must be
12.80 VDC).
• Voltage too low: recharge and load test
the battery.
2. Measure the battery voltage at idle. *It
should be 14.0 ~ 14.9 VDC before the cooling
fan starts to cycle ON and OFF.
• Voltage too low: check the stator coil
resistance. The correct specifications
are:
– Yellow to Ground = 0.22 ~ 0.60 ohms
– White to Ground = 0.29 ~ 0.84 ohms
– Out of Spec: replace stator assembly
• Voltage is too high: check wire continuity
(particularly the black wire which
should have continuity between the
Ground). The Yellow/Red wire should
have continuity between the lighting
coil and the regulator.
NOTE: If continuity checks good, replace the
regulator assembly. (Commonly, both headlights
are burned if the regulator has failed.)
• Voltage Okay:
–
–
–
NOTE: Do not check the battery voltage at
5000 rpm as explained in the Service Manual.
Charging output will decrease as rpm increases.
This is a normal characteristic of this
model.
*Since the system normally discharges anytime
the cooling fan is ON, all testing must be
done before the fan starts to cycle on and off.
Otherwise, the maximum measurable battery
voltage will be lower than 14.0 VDC.
SUBJECTS: 1. Unique Charging System Characteristics - YFZ450
2. Introducing YFZ450 Charging System Resistor Kit -
Resistor Kit for Competition Usage
3. YFZ450 Resistor Kit Installation Instructions

Check the radiator for blockage and
correct as required.
Advise the customer to use the key
switch to turn the engine off. Only
use the engine switch (on the handle
bar) in an emergency.
Advise the customer to switch the
headlights ON to increase the charging
output.
Introducing YFZ450 Charging System Resistor Kit -
Resistor Kit for Competition Usage
Symptom:
As explained in the previous subject (page 1),
the YFZ450 Charging System is designed to
supply at low to medium engine rpm a maximum
charging rate with the headlights
switched to the ON position. If the headlights
are removed for competition use, the unit may
experience battery discharging.
Remedy:
Install the YFZ450 Resistor Kit. The kit contains
a ceramic resistor which takes the place
of the headlights to maximize the charging
rate, plus it provides a higher temperature fan
thermoswitch to minimize current draw. The switch is
located sitting on the bike the upper right switch
NOTE: This higher temperature is still low
enough to not cause engine overheating.
The kit is optional for competition use and warranty
does not apply. The kit was developed to
allow maximum charging and reduce battery
load.
____part#________5TG-REGST-KT-00 part # for kit

thanks bc_____

thanks i was looking for that too, i havent expireince any charging p roblems but i run no lights for mx and i dotn wanan have any charging problems, anyone have pics of this?

hmm now if im not having any problems this wont have an adverse effect will it? and are they saying the on off bar switch should not be used? with this kit or regardless? and i always leave my headligth switch on on, are they saying you must leave the switch on on with this kit to charge?:grr: i wanted to junk that ugly switch

[jlhughes750]

Thanks for the info Splatter Matter!!!!!!! Have u been runnin the D6's at all???????? How have u been finishing???


Thanks again for the info, where did u find it, it reads as though its a service bulletin from Yamy?????????? I'll be ordering up this kit and installing during the winter rebuild...

later, J

What is the cost of this kit? I am thinking if you have an older yfz the trail tech kit might be a better choice since it rewinds you stator which more than likely will need to be done before too long anyway!

[jlhughes750]

Hey Homoracer, turn off your cap locks and shut the trap!!!!! This is a Yamy thread........... not a silly VS. thread!!!

[Splatter Matter]

Did really good this year.Yes i ran all the d6 races except the water world i mean bmer. that is my home track to.I just could never get over to talk to you guys the 2 year old was to buzzy running the show. Well you are right its a service tech bulletin the kit cost about $45.it is mainly for running with no lights. What it does is put the same load on the charging system as if you were running with the light on.
a true fix would in my opinion would be this kit and the trail tech rewound stator but call them first they are not taking 04 stator right now due to being unstable. don't for get to do this to it will make a big change in starting here is the link
http://www.off-road.com/atv/tech/yfz450_fixes/battery.html

[5valves]

I have the kit, I got it from Bob from magnolia.
wasnt very much. no problems here.
And for the 450R guy hows that start button working????
I kinda like my magic button!!!!
specially when I kill it in the middle of a creek, or should I find a hot start nobe then kick a forward ankle scaring bike.

[Xowner]

i just want to say that in stock trim i have never ever had my 450R kick back on me

if you want the magic button thats why you bought the yamaha and to each their own i had the 400ex it sucked when you went out to start it and it wouldnt turn over thats why i went with the kick b/c i didnt want to have to put up with the elc started

good luck

[Dale512]

Well, with the YFZ you have the option of adding the kickstart as a backup or totally getting rid of the e-start if you like, I don't beleive you have the option of adding e-start to the 450R if you want.:blah:

[Shuee_400]

No but it is called Rekulse

[SRH]

what are those 2 black things that look like plates and the gold looking switch