Hey, so I have a 2006 Yamaha blaster. At the moment it has vforce 4 reeds, and full Fmf exhaust pipe. Recently I just blew it up from running too lean. I had it running great before temperature dropped, so I’m guessing I’m gonna need to rejet it for the weather, what should I be running?
What jets should I run for colder weather?
- Thread starter 2006Blaster200
- Start date
As a general rule. You should go up 1 size for every 30 degrees of temperature drop. For example FMF pipe with open air box and stock Mikuni carb at 80 degrees, at sea level wants a 280 main. Everything the same but drop temp to 50 degrees, you should go up to a 290 main jet.
Start with a 280 main jet, needle in the middle clip position and go from there. What was your jetting before? Colder weather usually means going up on the jet size. Make sure you do a plug chop to check!
