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Duncan mid range +4 or no?


kawa110

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Got a shee with Duncan mid range motor. 
seller told me to run 50/50 race gas and 91. 
bike set up for glamis. 
 

called Duncan and I was told to run 110 or higher, not mix. I asked about going +4 on timing and was told with ther port job that it’s not necessary. 
 

1. should I go +4? Got a adjustable plate and a lightened flywheel(not installed yet) 

2. race gas or mix? 
 

3. Duncan’s “instructions” for the mid range motor is too run b9es plugs, I have always ran b8es. Why b9? 

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  • 3 weeks later...
3 hours ago, DDQ said:

Congrats on that motor! How did you get ahold of it? For those who did not know, that is the motor Doug Eichner raced and WON many pro and pro-am MX races with in the 90's with ZERO DNFs. It is also the motor still being run by most of the banshees competing in the Point de Vaux. 

 

https://dirtwheelsmag.com/hot-rod-banshees-mx-tt-quads/

Hp2000

im very happy with it!!!

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