Im @ sea level, running a WB E-Series slip on, K&N Drop in, Dyno jet 144/146, no baffle on the intake snorkel. Im going to put in a HC Stage 1, Wiseco 11:1, Nology spark plug wire, and was thinking of cutting the air box so it will only hold the filter in place. I use 91 octane with a bit of octane booster. What jets would you recommend with these mods? Where do I get them? I only have upto 150 right now. Thanks guys!

 

If you are running Dynos, I would recommend starting in the 160/165 range and go from there.

~HoundDog

 

You can get the jets from www.dynojet.com click on atv jet kits when there then jet assortments. You want the DJ style jet. They are $2 each. I'd get 155-200 if in it were me.

 

If you are using makunis jets i would start at 180/185,and you order them from yamaha..

 

I think Im going to go with Dyno Jet Jets and have my mechanic install them along with the rest of the mods. What would let me know I got the right size jets installed, plug color? smoke?

 

well someone who has ridden them and have that size in the bike or you will dig into that thing more than you want,get a ball park figure and also the way the bike runs you can tell alot,and one word of advice it's better to be rich than to let it run lean..you could also do a plug check and make sure that it is a light brown color and not white like it was when you put it in

 

Once you've ordered the jet assortment in sizes of your choice and recieve them I'd start out at 160/165 like previously mentioned for your mods. Should put you pretty close. Do plug checks to make sure your getting good color on the plug. I say to buy 155-200 because you don't know exactly what you'll need and one day you might have the mods nessessary to need a 200 main jet. But then if you ever get a different carb then the jets will be useless, or you find that the dyno jets aren't doing what you want or... well you get the picture.