As you rev the bike, what's the highest the volts get to?
That's low. should be at least 14 - 14.5 Does it climb any higher when you rev it higher?
As you rev the bike, what's the highest the volts get to?
I've never seen a setting spec list for the Canadian BS34s. I have no idea what clip slot on the needle was stock. I have compared one of those adjustable Canadian needles to a fixed clip U.S. model one though. The U.S. needle measures 50mm from the bottom tip to the fixed clip. The Canadian needle measures 50mm to it's top clip slot. That means any lower clip setting will be richer than the U.S. needle. The #2 (2nd from the top) slot may very well have been the stock setting for it.
Something else you can check is the air jet size in the bell housing where the air filter clamps on. That air jet feeds the idle circuit. U.S. models had a size 135. Most of the rest of the world with adjustable needle BS34s got a leaner size 130. But, being the air feed, less air means a richer mix.
That's a hard one to call. I'd hate to opine it's ok and have you burn up the rotor you just paid good money for...The rectifier/regulator unit is original, but have acquired the parts to build a new unit (winter project). In your opinion, Jim, is there cause for concern or anything I should be immediately worried about right now?
ave acquired the parts to build a new unit
That's a hard one to call. I'd hate to opine it's ok and have you burn up the rotor you just paid good money for...
Mines an 80SG. I just replaced the reg/rec on it 'cause it was gettin' flaky. Yours is only a year newer....
Did you pick up a type 'A' regulator?
You checked the rectifier side of it. Unless you have a variable DC power supply, you can't test the regulator part. So it's an unknown.So if I tested my reg/rectifier (page 1) and it is showing OK, what's next?
There's different Fiat regs. Is it the VR794?I bought the Fiat regulator
Sounds like it will be a good time to build the new rectifier/regulator unit.
You checked the rectifier side of it. Unless you have a variable DC power supply, you can't test the regulator part. So it's an unknown.
There's different Fiat regs. Is it the VR794?
Did you do as Gary said above? Rev to about 2500-3000 rpm and momentarily ground the green wire at the brush. If it jumps to 14-15V, it's the reg.Reading further in my Haynes manual again, it does sound like the regulator could be the culprit here if I am not achieving 14.2 to 14.8 volts at 2000 rpm.
Sorry bout that Jim! missed the rotor had been replaced, was thinking he still had the 2 ohm rotor in there. Good point GLJ need to make sure there isn't an unexpected heavy load. Or could be a voltage regulator with a low set point. Short the brush to ground (only do this for a short time, several seconds, enough time to rev the motor and see what the voltage does),
of note; "Lithium Ion Battery that is in good working condition"
Did you do as Gary said above? Rev to about 2500-3000 rpm and momentarily ground the green wire at the brush. If it jumps to 14-15V, it's the reg.
No. It should have stayed the same or increased. Dropping to 0.5V makes no sense. Let's do this to get a baseline here. Give us these readings:I only saw about 0.5 V on my voltmeter while revving. Is that correct?
No. It should have stayed the same or increased. Dropping to 0.5V makes no sense. Let's do this to get a baseline here. Give us these readings:
1. Battery voltage (B.V. at the battery) with the key off.
2. B.V. with the key on (not running).
3. B.V. with the bike at idle.
4. B.V. at 3000rpm.
Just for grins... do this slap test to make sure the rotor is getting energized.
Are you saying the voltage at the battery dropped to zero point nine volts? The green wire at the brush goes back to the regulator. The regulator grounds that wire to energize the rotor. All you are doing by grounding it is bypassing the reg. I don't see how a battery drop to .9V is even possible.Grounded green wire to engine at the brush at idle and read 0.9v
Are you saying the voltage at the battery dropped to zero point nine volts? The green wire at the brush goes back to the regulator. The regulator grounds that wire to energize the rotor. All you are doing by grounding it is bypassing the reg. I don't see how a battery drop to .9V is even possible.
Well, you're not overcharging.... which is a good thing. I don't think you'll hurt anything but don't hold me to that if sumpin does break.If I am not damaging anything by riding I will continue to tinker away and ride my bike as is.