Your stator charges your battery. To test it start your quad put a meter voltage tester red wire to positive side of your battery,Black wire to negative side of you battery, Give her a little gas and you will see the voltage increase to around 12.8 to 13 or so and you will know its charging the battery. By the way this is DC voltage. Hope this helps.
What Recharges The Battery?
I am trying to diagnose some electrical issues on my yfz. Sometimes the quad starts up fine but other times is hesitates and just gets worse untill the battery is completly dead. I am wondering what recharges the battery and if there is any way to test to make sure it is working properly??Thanks.
1 - 14 of 14 Posts
i know this aint electrical but are your valves in spec?
Valves would cause this problem. Good call.
if your battery is charged everytime you fire it up its not your stator. I would say valves, like i said before. They tend to cause problems if they havent been checked and/or adjusted for a while.
AAA++++ Check the valves.
QUOTE (sporner @ Mar 19 2009, 03:20 PM) index.php?act=findpost&pid=759748
Ok, i will check it out. But how does that check the stator?? Not saying you are wrong. Just want to understand it...
Your stator charges your battery. To test it start your quad put a meter voltage tester red wire to positive side of your battery,Black wire to negative side of you battery, Give her a little gas and you will see the voltage increase to around 12.8 to 13 or so and you will know its charging the battery. By the way this is DC voltage. Hope this helps.[/b]
Ok, i will check it out. But how does that check the stator?? Not saying you are wrong. Just want to understand it...
QUOTE (YFZER359 @ Mar 19 2009, 03:22 PM) index.php?act=findpost&pid=759751
A few days after i bought this yfz i bought a crf450r and tried to adjust the valves b/c it was running as if it the valves needed to be adjusted.Apperantly i did something wrong and i have not been able to get the crf450r running since then.
So even though i know it might need it i am little worried about screwing it up.....lol..i know its not that hard..i just dont want another headache.
How hard is it to check and shim the valves the yfz??
And i dont really understand how the valves would impact the problem i am having now?? Thanks
This is going to sound a little crazy but this is only my second yfz and i have not checked the valves. I had owned several yz450f's(mx bike) and i never had to check the valves on them. My first yfz was ROCK solid and reliable.i know this aint electrical but are your valves in spec?[/b]
A few days after i bought this yfz i bought a crf450r and tried to adjust the valves b/c it was running as if it the valves needed to be adjusted.Apperantly i did something wrong and i have not been able to get the crf450r running since then.
So even though i know it might need it i am little worried about screwing it up.....lol..i know its not that hard..i just dont want another headache.
How hard is it to check and shim the valves the yfz??
And i dont really understand how the valves would impact the problem i am having now?? Thanks
QUOTE (sporner @ Mar 19 2009, 03:26 PM) index.php?act=findpost&pid=759754
how would the valves cause this problem?? thanksValves would cause this problem. Good call.[/b]
QUOTE (YFZER359 @ Mar 19 2009, 02:28 PM) index.php?act=findpost&pid=759756
How many checks/adjustments can you get out of the head??
I know on a crf450r once the valves start to tighten up its only a matter of time before you have to spend alot of cash to rebuild or relace the head...not good..
if your battery is charged everytime you fire it up its not your stator. I would say valves, like i said before. They tend to cause problems if they havent been checked and/or adjusted for a while.[/b]
How many checks/adjustments can you get out of the head??
I know on a crf450r once the valves start to tighten up its only a matter of time before you have to spend alot of cash to rebuild or relace the head...not good..
Man this is a hard one to break down. Ok i have a polaris preditor i am working on with the same problem. We can pull start it and it fires right up, Use the starter and it run's the battery dead. So if your vavles are out of spec it throws the firing off. The engine and valves work together so if the valves are not set they may not be open or closed when they are supposed to be. So you run into a hard starting engine that once running dose ok. Its hard for me to exsplane this in writting. Really check the valves, On how many times you can do this i really dont know.
QUOTE (sporner @ Mar 19 2009, 07:42 PM) index.php?act=findpost&pid=759927
i understand how it works. I was just unsure of how it would affect the battery. I guess the valves being out of spec will casue the hard starting which will cause the battery to die..
It just seems like the battery should still charge just fine..even if the valves are a little tight..
Do you happen to know what the clearances are for the valves?? Thanks.
Man this is a hard one to break down. Ok i have a polaris preditor i am working on with the same problem. We can pull start it and it fires right up, Use the starter and it run's the battery dead. So if your vavles are out of spec it throws the firing off. The engine and valves work together so if the valves are not set they may not be open or closed when they are supposed to be. So you run into a hard starting engine that once running dose ok. Its hard for me to exsplane this in writting. Really check the valves, On how many times you can do this i really dont know.[/b]
i understand how it works. I was just unsure of how it would affect the battery. I guess the valves being out of spec will casue the hard starting which will cause the battery to die..
It just seems like the battery should still charge just fine..even if the valves are a little tight..
Do you happen to know what the clearances are for the valves?? Thanks.
What year is your yfz? From what i gathered from you is somtimes you go out and it fires right up, Somtimes it dosent .Is that right? When those valves are out of spec it will cause this. But it sounds like the battery is charging one way to tell is check your voltage on its good day when it fires right up, And check it when you have problems with it. Just put a meter on the battery do this when its not running should be 12.6 volts i just checked mine. Hope this helps
QUOTE (Donovan @ Mar 19 2009, 07:17 PM) index.php?act=findpost&pid=759910
QUOTE (Donovan @ Mar 19 2009, 07:23 PM) index.php?act=findpost&pid=759917
QUOTE (Donovan @ Mar 19 2009, 07:46 PM) index.php?act=findpost&pid=759931
and the valves clearences are:
Intake: .004"~.006'
Exhaust: .008'~.01'
NOTE: That is in inches, not MM!!!
you can find the "How to" on valves in the "Maintenance" Section under "Pinned Topics". Can post a link if you want
the valves are basically the focal point on these motors. Once they are out if wack, the whole bike is going to be out of wack. And it is not hard to set valves, i am 15 and i do my own valves. If you dont feel comfortable doin it yourself, your dealer or any motorsport shop can do them between $40-$80.This is going to sound a little crazy but this is only my second yfz and i have not checked the valves. I had owned several yz450f's(mx bike) and i never had to check the valves on them. My first yfz was ROCK solid and reliable.
A few days after i bought this yfz i bought a crf450r and tried to adjust the valves b/c it was running as if it the valves needed to be adjusted.Apperantly i did something wrong and i have not been able to get the crf450r running since then.
So even though i know it might need it i am little worried about screwing it up.....lol..i know its not that hard..i just dont want another headache.
How hard is it to check and shim the valves the yfz??
And i dont really understand how the valves would impact the problem i am having now?? Thanks[/b]
QUOTE (Donovan @ Mar 19 2009, 07:23 PM) index.php?act=findpost&pid=759917
and notice the first letters of that 450, CRF. Honda is crap and the single cam design SUCKS WEINERS compared to the dual cam design.How many checks/adjustments can you get out of the head??
I know on a crf450r once the valves start to tighten up its only a matter of time before you have to spend alot of cash to rebuild or relace the head...not good..[/b]
QUOTE (Donovan @ Mar 19 2009, 07:46 PM) index.php?act=findpost&pid=759931
i understand how it works. I was just unsure of how it would affect the battery. I guess the valves being out of spec will casue the hard starting which will cause the battery to die..
It just seems like the battery should still charge just fine..even if the valves are a little tight..
Do you happen to know what the clearances are for the valves?? Thanks.[/b]
and the valves clearences are:
Intake: .004"~.006'
Exhaust: .008'~.01'
NOTE: That is in inches, not MM!!!
you can find the "How to" on valves in the "Maintenance" Section under "Pinned Topics". Can post a link if you want
1 - 14 of 14 Posts
- This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
YFZ Central
A forum community dedicated to Yamaha YFZ owners and enthusiasts. Come join the discussion about performance, modifications, troubleshooting, maintenance, classifieds, and more!
Full Forum Listing
Top Contributors this Month
View All
alex450r22
20 Replies
kb motorsports
12 Replies
Memosrt4
11 Replies
Recommended Communities
