I'm getting ready to get my motor back from the shop and I was wondering what size Pilot and Main jets everyone is running in there 686's. Here is the list of motor mods. 12.5:1 102 mm piston JE, 696/697 grind web cam, Curtis Sparks pipe, Pro-flow intake with K&N w/outerwear no air box lid, Trinity chamber mod, porting, Valve job, 32mm intake valve, remaining four valves are stainless, Heavy duty valve springs. If anyone can give some info so I have a good reference point to start from. Does anyone have a set-up similar to this? How does it run? My Raptor's head leaves Trinity friday so I am getting very anxious. I want to be prepared when it shows up. My elevation is about 1500 feet. Thanks for any info you can pass along.



Jason

 

I have 180/185 mains, needle in 4th slot, stock pilots. Try Trinity's web site under teck and there is a jetting guide.

 

Blue leader got you started. I had to go to 27.5 pilots. I had a stumble that reaed it head on to many occasions. It takes hours to fine tune the carbs. Once you think it is right change again. If the 180, 185,190 works but some thing seems a little stumble here ar there go up on pilots. I stayed amay from pilots because of past reading on this board. It is still trial and error. Adjust your air/fuel screws 1/4 at a time and record on paper, so you will know what you have and have not tried.