SteveWFL
Moderator
Posts: 27920
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posted December 07, 2008 07:47 PM
 Edited By: SteveWFL on 8 Dec 2008 05:14
How to diagnose R1 charging system
(thanks to "martinc" in the r1-forum)
In regard to lack of charge:
1) Charge the battery overnight (7~12 hours), not to exceed 24 hours. You may exceed 24 hours if you are using a ‘smart charger’.
2) Disconnect charger and allow battery to stand for 30 minutes. Check the battery voltage with a digital voltmeter. The voltage should be around 13.3~13.5. If the voltage is less than 12.5, replace the battery.
3) Install known good battery into bike and start engine. After warm-up, bring engine speed up to 5000 rpm and measure the battery voltage at the same time. The voltage should be about 14~14.5 volts. If the voltage is greater than 15, the problem is most likely the rectifier/regulator. If the voltage is less than 13.5, then it’s either the alternator (stator coil) or the rectifier/regulator, or possibly even both.
3a) SIDE NOTE: A problem that seems to occur with the R1 rather frequently is the 3-terminal stator coil connection fails and the resultant heat from the I*R drop melts the connector. In addition, the red-wire contact on the rectifier/regulator connector also has a history of oxidation/corrosion. Be sure to check these!
4) To check the stator coil (alternator), measure the coil(s) resistance at the 3-terminal connector with an ohmmeter. The resistance reading between each coil (three total), should be 0.45~0.55 ohms @ 20C (68F). If not, replace the stator coil. Be sure to negate (subtract) lead resistance from your readings. To do this, touch the meter leads together and note the value of the resistance reading; subtract this value from your stator coil readings.
NOTE: Attempting to read around 0.5 ohms on an analog meter is difficult enough on the X1 scale, much less the X10.
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2010 Concours14
'08 R1 YAMAHA
ZX14 gone!
CBR600RR track bike
  
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flite leader
Zone Head
Posts: 651
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posted December 08, 2008 07:59 AM
so what was the problem
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bend your mind.....
or break your ass...!!
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SteveWFL
Moderator
Posts: 27920
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posted December 09, 2008 04:40 PM
I had two simple probs but thought originally my bike was all facked up.
Problems were:
1) wouldn't crank if it got hot enough for fans to kick on (dead)
2) right side fan wouldn't work
Solutions were:
1) replaced battery
2) replaced fuse for right side fan
Hey I was about mad and ready to trade the thing, next time I'll have more faith in the bike 
____________
2010 Concours14
'08 R1 YAMAHA
ZX14 gone!
CBR600RR track bike
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