Are the throttle butterfly valves seating correctly in the throttle bores?
They are chamfer cut on the edges that seal against the bore. When
tighting them to the throttle shaft you must do so with the throttle stop
backed out completely and then ensue that the butterfly is installed in the
correct orientation through the throttle shaft and then while completely
closed, tighten the two pinch screws that pass through the throttle shaft.
Using a bright lamp from the reverse side, sight down the throttle bore to
see if you have any light passages between the bore and the butterfly -
where there's light there will be air.
If this doesn't fix it, persevere with other suggestions from the list.
Larry (SPITMAN)
----------
> From: Bob <rlmcneit@cpis.net>
> To: triumphs@autox.team.net; triumphs@autox.team.net
> Subject: More SU woes
> Date: Saturday, March 28, 1998 6:54 AM
>
>
> Last week I sent a letter about some problems trying to get my SU's to
> idle below 1000rpms (TR4). The carbs were rebuilt\rebushed 3000miles
> ago by Apple Hydraulics. I checked for vacuum leak everywhere-none. I
> checked float raise and then installed Grosse jets. I even bought the
> Gunson Colour tune kit. I adjusted the mixture to exact specs (bunson
> blue). If I unscrew the throttle stops all the way, I'm still idling at
> about 1000rpms. What's going on?
> I disconnected everything from the throttle linkage, and with everything
> off the throttle blade sometimes sticks....even after WD40. There's
> nothing attached to make it stick???? Even when I push the blades all
> the way down.....1000rpm
> I'm Lost!!! Bob Mc 8-(
|