Starter motor?


9 replies to this topic
  • bopper450

Posted September 06, 2015 - 08:48 PM

#1

Hey guys I have all the must have mods done to my 12 wr 450 and also had the co set by my dealer and the bike was a breeze to start with the button for about a year, now recently I pretty well have to kick start my bike in every scenario and nothing else has been changed. Is my starter motor getting weak? What else can you guys think of?

  • JVP

Posted September 08, 2015 - 12:44 PM

#2

The starter relay tends to go bad on the WR's.  Bypass the relay to check the quality of the starter.  If it still good, then your relay is going bad.



  • Spiritwalker2222

Posted September 08, 2015 - 07:27 PM

#3

How fast is the starter suppose to spin the motor? Last time I had my FI tool hooked up to the bike, I noticed that the starter motor would only spin the motor to about 600 rpm. Not sure how fast it's suppose to spin, but I thought it would have been faster. My bike is hard to start when warm, but with my latest adjustments will start right up when in neutral.



  • vlxjim

Posted September 08, 2015 - 07:38 PM

#4

Make sure your battery is good. It may seem good, but only a very good battery will start these bikes.



  • stevethe

Posted September 09, 2015 - 06:49 AM

#5

Never heard of the relay going bad either they work or they don't. Put a Lithium battery in there and be done.



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  • DeepPurplishBlue

Posted September 09, 2015 - 09:38 AM

#6

Never heard of the relay going bad either they work or they don't. Put a Lithium battery in there and be done.

 

 

I have 8 WRs from 2003 up and only once has a relay failed and it happened to be on my oldest and

most heavily used bike.   So 11 years and probably 30,000 miles before a failure.   That is a lot of starts.

 

It was a misleading failure--   it still clicked but no action from the starter.    Might lead you to believe the

starter motor is at fault but jumping a tool across the two 8mm bolts on the relay will tell you if it is the problem

or not. 

 

+1 on the lithium battery.    I put a shorai in my main WR a few years ago and it has worked great.  

Try one and you will never want another lead-acid battery.



  • Jon-D

Posted September 10, 2015 - 06:57 AM

#7

all the above and check voltage at starter when you push the button to make sure you getting all the juice.  also check connections.  I had a similar problem with my KTM turned out a couple of wires developed some corrosion which resulted in a voltage drop to the starter. 



  • Krannie McKranface

Posted September 10, 2015 - 02:20 PM

#8

I would say the number 1 reason for bad starting action is a bad battery, and number 2 is a dirty harness or ground.

 

The stock battery is only 9ah, and only for about the first 100 starts. After that it's amperage drops quickly.

 

Shorai recomends a 12ah battery as a MINIMUM for best starting.



  • bopper450

Posted September 12, 2015 - 04:12 PM

#9

If I were to order a shorai is there a part number for replacement fit for our bikes ?

  • Krannie McKranface

Posted September 12, 2015 - 04:45 PM

#10

If I were to order a shorai is there a part number for replacement fit for our bikes ?

 

Go to their site and enter your bike info






 
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