Super Jet Solved: my bogging issue!!!!

[58vwragtop]

I have been fighting a bogging or lack of low end power. I have had problems since the beginning of the year. I built a new engine (62t/61x fully ported) with new electrical (epic cdi) and had issues. I changed pump and impeller, rebuilt my blackjack carbs and still had the problem. I thought it may have been a porting problem so I built another fully ported motor and the exact same bogg issue. I decided to try to change spark plugs, I went from a BR8ES (resistor) or a B8ES (non resistor), WOW, that fixed it!!!!! It has tons of pull now:splatt:

So I just wanted to let some of you know that are fighting a similar issue, try and change your plugs. I was looking at a Clymers manual for these Yamaha's and I saw that some used resistor plugs and some didn't. So it solved my problem.

 

[WFO Speedracer]

Yep it depends on what type of spark plug cap you have, if you have resistor caps you don't need resistor plugs and vice versa, I chased down a misfiring problem for months on a Westcoast Dual total loss system just to find out I had the wrong type of spark plug caps on it, changed spark plug caps and it ran like new money.

 

[ncbrock]

what plug caps and wires are you running?