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Discussion Starter #1
I was told that the bike should run off the alternator once started and since mine cuts off when you remove a battery lead I have a charging problem.

I've done the service manual checks and I believe my stator is working fine, almost positive my regulator rectifier is working fine and after studying the charging circuit I think the battery has to be in the loop for the bike to run. Can anybody confirm this?

If so, then I think I just have a bad battery and my charging system is fine.
 

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A total loss system uses no charging system and runs totally off a fully charged battery, which (hopefully) should last until the end of the race.
Then the battery is either switched with a charged one, or is recharged.
 

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Easiest way to check the charging system is to first measure battery voltage with the ignition off. That should measure around 12.6V. Then start the bike, hold RPM around 3000 to 4000 and check voltage at the battery again. It should be higher, probably 13.5V or higher.
 

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Easiest way to check the charging system is to first measure battery voltage with the ignition off. That should measure around 12.6V. Then start the bike, hold RPM around 3000 to 4000 and check voltage at the battery again. It should be higher, probably 13.5V or higher.
Whatever you do, don't go cheap on a new battery!!!:twocents
+1 If the the battery reads 12.6V with the bike turning 3000 rpm that means there is NO charge being put back into the battery. I just had to do this the other week because my one year old parts unlimited battery went to s*** on me. When I put the new Yuasa battery in and checked the voltage it was reading 14V. i'm never going to go the cheap route on a battery again.:twocents
 

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Discussion Starter #11
Thanks for all the responses. Just wanted to update anybody interested. At the track I didn't have a multimeter so when we took off the battery leads while the bike was running and it cut off, we assumed it was the charging system. I've been able to check it since though and I can read a voltage of about 14.5 with the bike running, so the charging system is fine.
 
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