Thanks to all for any help
Going to replace the jets on my BF 650. Will I need to also replace the needles. I went to Nyrocs site and he said replace the jets first. I'm really looking for experiance right now. What have been soem of you guys luck? thanks

If I have time this week I may do a air box mod also/ Thanks

 

No need to replace needles, you need to shim the stock ones by .020" - .025", it only takes about 1 hour start to finish. I jetted up to the next size front and back on the mains and mine runs a little rich over 1000'.