RS125 Coils

**Sun Aug 16, 2009 6:37 am » Post: #1 » Download Post**

Hi People.
I've come across a couple of new RS 125 Coils . Is it possible to put these on my 21 race bike. They look alot different to the stock 21 Coil's??
Cheers

**Sun Aug 16, 2009 9:01 am » Post: #2 » Download Post**

Proper Honda RS125 coils or tacky Aprilia ones?
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**Sun Aug 16, 2009 9:06 am » Post: #3 » Download Post**

Proper ones Stephen lol heaven forbid using Italian electronic's. I know all about them from an Intergrale I owned Rolling Eyes

**Sun Aug 16, 2009 9:11 am » Post: #4 » Download Post**

If they are NX4 ones with the two connectors then they can be made to work and should perform better than the stock NSR coil.

If they are the older NF4 coil then I would think you would be better off with the stock coil.

You can also make late spec NF5 RS250 Honda coils work.
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If I have to take the carbs off once more...

**Sun Aug 16, 2009 9:37 am » Post: #5 » Download Post**

yeah they're nx4 ones with the 2 little connectors.
does the coil body need to be earthed? or are the 2 metal tag's on either end of the coil soley for mounting purposes. does it matter which wire goes to which pin?
Thanks for you wisdom Stephen Very Happy

**Sun Aug 16, 2009 9:45 am » Post: #6 » Download Post**

On a Honda it doesn't matter which wire goes to which pin.

The body shouldn't need to be earthed either on that coil.
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If I have to take the carbs off once more...

**Sun Aug 16, 2009 11:00 am » Post: #7 » Download Post**

Cheers Stephen you're a Champion Bloke.

**Tue Aug 18, 2009 12:43 pm » Post: #8 » Download Post**

Just for the record, I compared the stock NSR coils with some RS250 NX5 coils on my bench tester, and the difference in spark strength was truly amazing.

That's why I run RS coils.

**Fri Sep 18, 2009 6:58 pm » Post: #9 » Download Post**

Is there any improvenent on the dyno with the rs coils ?