Moderator: chasthor

Stator,charging output,spark ?

Joined: 6:50 AM - Sep 10, 2017

7:56 AM - Sep 10, 2017 #1

HI,I AM NEW SO PLEASE FORGIVE MY LACK OF KNOWLEDGE AND HELP ME GET THIS FIZZY GOING PROPERLY!
Q1,CAN SOMEONE TELL ME WHAT THE CHARGING RATE SHOULD SHOW ON A MULTIMETER REVVING THE ENGINE UP,AND IS IT THE GREEN OR YELLOW WIRE TO CHECK,OR SHOULD BOTH WIRES GIVE THE SAME READING ?
Q2,I HAVE A 1976 FIZZY WITH ENGINE NUMBER 3F1-245057 COULD SOMEONE IN THE KNOW TELL ME IF THIS IS A CORRECT ENGINE FOR THIS BIKE OR FROM A LATER MODEL.
Q3,RELATING TO PREVIOUS QUESTION,MY ENGINE HAS A LARGER BARREL AND HEAD FITTED WHICH LOOKS LIKE THE LATER FIZZIES,DOES THE LATER BARREL AND HEAD FIT THE EARLIER MODELS WITH THE SMALLER CYLINDER ?
Q4,CAN SOMEONE TELL ME THE BEST PLACE TO BUY THE STATOR COILS FROM AND HOW MUCH THEY WILL COST ME ?
Q5,CAN SOMEONE EITHER SELL ME A DECENT MPH SPEEDO OR TELL ME WHERE TO BUY ONE FROM WITHOUT PAYING £225 FOR ONE !!!
THANKS IN ADVANCE FOR ANY INFO THE FIZZY EXPERTS CAN SUPPLY.
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chasthor
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chasthor
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Joined: 7:40 PM - Jun 29, 2005

8:04 AM - Sep 10, 2017 #2

Welcome to the site Howard.

Charging rates are the domain of mech73 and MLC and they'll surely be along at some point to answer that.

3F1? 3F6 possibly? would have thought your frame would be a 394 as the engine should be, sounds like a later engine has been fitted.

all barrels and their heads are interchangeable throughout the range.

Coils are probably still available from Yamaha and often to be found on ebay. Source and lighting coils go for between 50 and 80 pounds each.

Speedos are a rare thing to find in any form.
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MLC
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MLC
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Joined: 3:33 PM - May 14, 2008

9:00 AM - Sep 10, 2017 #3

I would check all of your wiring first as the coils rarely fail,ask Mech about wiring tests.
3F series engine are from an 80's model,if your 76 is a disc brake the prefix would be 596 for a UK model or 599 for Europe
R/H drum brake would be 394
This is the lighting coil

http://www.ebay.com/itm/YAMAHA-YG5-or-o ... 2432107019

the other coil is

http://www.ebay.co.uk/itm/NOS-OEM-Yamah ... Sw4A5YqHIO

Good luck finding a sensible priced speedo.
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mech73
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mech73
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Joined: 8:43 PM - May 19, 2007

12:37 PM - Sep 12, 2017 #4

With the green and yellow wires disconnected from the main loom, you should get well over 12 volts AC between yellow and earth , probably as much as 50 volts. Whatever you get on yellow it will be less than that (maybe about half) between green and earth.

If you can apply a load (eg a 12V car headlamp bulb) and then measure volts and amp simultaneously (2 meters required) you can calculate the output in watts (volts x amps) which would be about 40W (on yellow) if the generator is good.
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