Ok I just did an exhaust mod (HMF Penland) on my P700. HMF recommend to change jets.

I went to the dealer to get the recommend sizes 142/145. Since 142 is already stock in the rear I just have to move that to the front.

My problem is the dealer did not have a 145 he had 146. Do you think this will make a difference?

I did a plug check prior to exhaust mod and its running rich already. Should I run it to see if the original jets are ok?

Do I have to remove the carbs to rejet? What’s the easiest way to get to them?

 

I would rejet. The 146 should not make much difference if any compared to the 145. However I would make sure the dealer gave you a keinin jet and not a mikuni, these things have been known to happen at dealers. I don't know for sure but I'm not positive keinin makes a 146??? most of mine jump in increments of 3 ie. 142 to 145. As far as rejetting you don't have to remove the carbs. The bowls are on the right side of the carbs and you can get to them with a screw driver. If you'll sit on the ground and look above the front of the belt housing and under the side plastic you'll see the bowls. I would shut off the fuel and let the bike run till it dies, this will almost empty the bowls. Then take out the 4 screws holding each bowl, easier said than done if you haven't done it before the screws are very soft, easy to round off, and in pretty tight. Once you get the screws out pop the bowls off and change out the mains. When you put it back togther I would strongly recommend replacing the phillips screws with allen heads. If you have to rejet again it will be much easier with an allen wrench with a ball end. That will keep you from having to be straight on with the allen head. Good luck with those factory screws[img]i/expressions/face-icon-small-smile.gif[/img] If you tap the end of the screw driver with a hammer it may help you get them out easier.

 

The number stamped on the jet, is the size of the hole. For instance the 145 jet, measures 1.45mm, which is .0570". A 146 jet is 1.46mm or .0574", for a difference of 4 ten thouthanths of an inch. Yes its a difference, but incredibly small. Thats why the jets are in increments of 3 or 5, so there is a meaningful difference, between steps.
Id change the jets,

 

Before I took on this challenge, I did some research and many have complained about he screws being soft. I was able to get 3 out of four on the first one.

I ended up disconnecting the carbs from the air intake and engine so I could get a better angle on the screw. I got it off but like you said I don’t want to go through this trouble again so I want to replace the screws.

Do you know what the thread size is?

FASTFATBOY
I think your right. I don’t think Keihin makes a 146. (http://www.sudco.com) I wonder what the heck the dealer gave me.

 

They are just regular machine screws. I went to Home Depot to find allen head ones that mach the length. I would bet that the dealer gave him a mikuni jet.