Jump to content
Sign in to follow this  

AP Linkage '02 WR250F

Recommended Posts

Guys, i need to know how your linkage operates normally. I had my carb apart this weekend for general P.M and noticed that when i held the slide wide open, the linkage did not go all the way down to the metal stop molded in the side of the carb housing.

I have not messed with this linkage and thusly i do not know what normal operation looks like. I took care of my bog with lj's and diaphragms. I can advnace the linkage manually with my finger to the stop with no resistance and it still discharges fuel.

Examining the linkage, it seems pretty simple. Two opposing springs and a actuator rod. I checked the rod, it was straight. I checked for gunk in the pivot of the arm, it was clean.

Before i go any further, i would like to get some advice from someone that knows what a properly operating unit should do. I do not want to create a problem if one does not exist, know what i mean???

Share this post


Link to post
Share on other sites

The pump will not necessarily use the full stroke of the diaphram. It depends on the cam running the pump and the diaphram stud length.

You don't have a problem if the pump is set to actuate per the manual tuning section for the carburetor.

James

Share this post


Link to post
Share on other sites

Thats the problem JD, after the spring has pushed the cam to a stopping point, short of the stop on the side of the carb, i can further depress it with little to no resitance until i feel it bottom out on the diaphragm cover.

I found some rod stock, back off of my idle adjustment until the slide was @ 1.5mm, checked it again and it is the same.

So you are saying that the rivet on the bottom of the diaphragm should be the only thing in a non modified AP linkage circuit that would inhibit the travel?

Share this post


Link to post
Share on other sites

The diaphram does not need to bottom out. If you've set the pump freeplay with a rod per the manual, your timing and pump stroke are correct as long as there is no binding or dirt stopping the linkage.

The tab was made to mount a stop screw, but it does not need to be used when you have leak jets to adjust instead.

James

1.jpg

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Reply with:

Sign in to follow this  

×