Alternator/Stator

[Sean7R]

Ian, did you have the tacho fault with the stator you have tested here? sean

Nope, why ?

i thought that this may be related as my tacho runs up to 5000 and then drops to zero with the odd blip every now and then. im willing to rewind mine to see if it does. sean

[Ian]

If it's not a faulty tacho, CDI or a dodgy connection then it's got to be the stator. If it's the stator then it must be affecting the running of the bike at higher revs.

Measure the resistance of the excitor coils, cold and hot. It might give you an idea.

[Sean7R]

Ian, did you have the tacho fault with the stator you have tested here? sean

Nope, why ?

ive got a spare stator, ill rewind the high/low windings, to see if this cures the tacho fault, as my tacho goes to 5000rpm then drops to zero with the odd blip here and there, i replaced a stator(new) on a ns400 some 14/15 years ago and that did cure it. or im i barking up the wrong tree. sean

[Sean7R]

sorry for the double quote, i could not find the first. sean

[Sean7R]

the bike goes ok, ive not had this one long and ive only done about 75miles, ill test them when the weather gets cooler, its just too hot at the moment, ill let you know the readings when i do. sean

[Ian]

I have just "created" a bouncing tacho.

I left the plug lead off number 2 cylinder. It had no plug cap on.
Started the bike and every now and then the lead would jump a spark to the frame. When that happened the tacho bounced. So double check for "leaks" from the HT leads. Try running the bike at night when it's nice and dark. Look in and around the cylinders.HT lead to check it's not breaking down somewhere.

[Ian]

Latest readings.

Run Engine for 5 mins.

Green - Bike Ground - 0Ω
1: Green - Black/Yellow - 244Ω
2: Black/Yellow - Black/Red - 33Ω
Green - Black/Red - Reading 1 + Reading 2 277Ω

Voltages are much lower now too. This is a little surprising to me.

Excitor Coil Tickover Voltage

Low Speed (Green - Black/yellow) - 58v
High Speed (Black/yellow - Black/Red) - 35(ish)v

Combined - 93(ish)v

Bike is now firing on all 3.

Tickover is showing as around 1400rpm on my tacho

[Ian]

Just some info from a company called Electrex World Limited.

Dated 21/08/2008 so expect a price rise since I was quaoted.

For your model we can only repair the original stator cost £75 + vat and post or supply the source coils separately, ref c100 and c110 .

Regards
Peter Houghton
Electrex World Limited
Tel: **44 (0)1491 682369
Fax: **44(0)1491 682286
http://www.electrexworld.co.uk