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I have been trying to solve my idle problems with me 1986 SEI and in doing so have probably made them worse. What I have done is change the throttle linkage and not in a good way. As far as I can tell there are three screws one can adjust. The one on the left side that is used to set the initial voltage for the TPS. The one in the middle that is the idle setting and the one on the right for throttle plate sync. I have not touched the one on the left for the TPS voltage. However I am sure I have the other two out of their proper setting. The Manual calls for the idle to be set at 1000 RPM and then adjust the throttle plate sync. My bike will not idle at 1000 it is eratic and ranges from 800 to 1100. So I have tried to set the idle and throttle plate screws by ear. It has not worked well...(surprise,surprise)

What I need is a way to get these screws in the proper settings. Is there a way to do this when the bike will not idle smoothly? Perhaps a baseline setting that is close. Middle point?

Any and all help is appreciated......I want to Ride!
 

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I am not familiar with the 1200s but it sounds like you need to use a feeler guage or wire to synch the throttle plates. I'd do that first, then set the idle, then synch it with a manometer and reset the idle.
 

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you need a vacuum gauge to sync the throttle plates. i think there is a loan program for the gauges on this site. i think it is at the for sale / wanted board.
 

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UnPilot, search for SEI on the forum. You need the aid of someone who has experience with your fuel injection system and setting it up properly.
 

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Discussion Starter · #5 ·
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I have searched and read almost all post's related to the FI 1200's. I cant seem to balance the throttle plates as one side seems to draw much more than the other and no amount of turning the adjustment screw seems to change that. I am at a loss.
 

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My understanding if they cant be ballanced is either a carb build up or a vaccume leak. With that mileage I would think vaccume leak.
 

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Discussion Starter · #8 ·
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I replaced all the vacuum lines from the intakes to the PB sensors today and it seems to run better. I still think I have the throttle plates a little off.

The weather has been so dang nice too!:headbanger:
 

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If I recall there is a rather large vaccume line in the center of the intake or near that. im wondering if it could be the intake manifold gasket. The problem with these bikes are there are so many vac lines and you have to take so much apart to find them. Happy hunting. You will find it just take your time she is worth it. :)
 

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Discussion Starter · #10 ·
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Thanks I will keep hunting this thing down.

Nice looking bike ya got there!
 
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