Who has changed these in their 650?

I have the mid and top end dialed in perfecty(beating P700's) but have a slight hesitation for the first couple of feet after which she just pulls,pulls,pulls...
I have played with settings on the air screws to no avail. Ordered #42,#45 and # 48 pilots today and would like to know which one to try first to save some time when they come in.

Thanks in advance for any input.....

 

I recently had mine changed. I was like you and changed my mains and shimmed my needle and my only problem was the hesitation at the bottom. I couldn't get it right with the mixture and took it to someone who was good. They changed the pilot jets but I don't know what they changed them with. Now I can't keep the front wheels on the ground in high. Before, the front wheels would come up a little bit, but now I have to lean way over the handle bars to keep it from flipping if I go WOT from a dead stop.

 

I would go up one and try it and if it gets better then maybee go up on more if it gets worse than go the other way untill you get it dialed in

 

RebelDS,

I take it you had a shop or friend do this for you?
I couldn't impose upon you to make a call find out what size was put in it along with your elevation, could I........

 

I have just order pilot jets. I did some testing and found to be lean until just after 1/4 throttle. I was also getting popping and back firing about 1/8 throttle. I installed dial a jet so I did jet down the mains and the needle (slightly) for the dial a jets but the just off of idle there wasn't much adjustment with the air screw. If this is what you are experienceing then you will need to jet up. Small pilot jets will also cause surging up till about 1/4 throttle. I also ordered #42 & #45. I would start with the next one up and try it (#42).

 

My invoice says #40......don't know what the service manual says I'm supposed to have stock.

 

Hmm...
#40 is the stock size...

 

My stock ones are #40.

 

Well it looks as if I may be charting new territory here.
Parts should be in by the weekend, so i will report back next week with my results.

 

I'm not sure what he put in....looks like a 40.....but it sure runs so much better and no more hesitation or spitting.