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Grand High Inquisitioner
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I've never been into the starter on an ATV, only cars and a Polaris RZR, but the concepts have always been the same so I will take a stab at these possibilities:
1. You may have a bad "bendix" or solenoid or whatever it is that engages the starter motor's gear into the teeth of the ring gear or flywheel. So it may be sort of trying to engage, but does not have enough oomph to shove the gear into place.
2. You may have a bad spot on the ring gear or flywheel.
3. You may have a bad gear on the starter motor.

Regardless, you will need to at least take the starter motor out and have a look. I suspect you're going to find chewed up teeth and metal bits in there, to start with. You'll probably find more damage when you dig deeper.
 

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Discussion Starter · #3 ·
I've never been into the starter on an ATV, only cars and a Polaris RZR, but the concepts have always been the same so I will take a stab at these possibilities:
1. You may have a bad "bendix" or solenoid or whatever it is that engages the starter motor's gear into the teeth of the ring gear or flywheel. So it may be sort of trying to engage, but does not have enough oomph to shove the gear into place.
2. You may have a bad spot on the ring gear or flywheel.
3. You may have a bad gear on the starter motor.

Regardless, you will need to at least take the starter motor out and have a look. I suspect you're going to find chewed up teeth and metal bits in there, to start with. You'll probably find more damage when you dig deeper.
Thanks for the reply, So I forgot to mention that I replaced starter motor and starter solenoid, also I had the cover taken off and tried to start couldn't really notice any visible issues with the gear teeth.

What I was curious about is the one-way bearing,, it almost seems like its cranking over but slipping or not grabbing something to fully turn over. To sort of verify I was pulling the pull start and it didn't feel like it was slipping but I'm not very familiar with these type of failure. Tempted to just order one.
 

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Grand High Inquisitioner
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990 Posts
Thanks for the reply, So I forgot to mention that I replaced starter motor and starter solenoid, also I had the cover taken off and tried to start couldn't really notice any visible issues with the gear teeth.

What I was curious about is the one-way bearing,, it almost seems like its cranking over but slipping or not grabbing something to fully turn over. To sort of verify I was pulling the pull start and it didn't feel like it was slipping but I'm not very familiar with these type of failure. Tempted to just order one.
And here is where my machine-specific knowledge is not good enough to help any more. I just looked up the parts diagram and I see something in the "Starter Clutch" category called a one-way assembly. That does seem like a likely candidate, but at $200, I'd be taking my setup apart again first to make sure I didn't make some goofy mistake.

Hopefully some of the guys with more 660 experience will see this thread soon.
 

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Discussion Starter · #5 ·
Hoping so, just trying to get an idea of where to start tearing into, if its the starter clutch area. Would much rather figure out the issue on my own instead of take it to Yamaha lol.
 

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Hey...Lasvegas660..Welcome to GC from Wisconsin.
Because it spins and spins but then eventually starts and runs good I'd say the starter oneway is toast. About $100.00 online.
 

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Discussion Starter · #7 ·
Hey...Lasvegas660..Welcome to GC from Wisconsin.
Because it spins and spins but then eventually starts and runs good I'd say the starter oneway is toast. About $100.00 online.
Thanks! Glad I found this site, there is a lot of good info here. Going to order that pup and throw it on there. Will update once I do !
 
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