'93 VN 750
Join Date: Jun 2010
Location: Gainesville, Florida
Running rough at cruising speed
Recent carb cleaning, lots of Seafoam, removed the 2 small red diaphrams in the gas cap and cleared vent lines (after reading about POOGS)...
I have easy cold start in the mornings (with Choke ON), smooth idle, smooth and fast acceleration, easy warm start after a drive, but when reach cruising speed 45+ mph it feels like its struggling for enough gas (or air?) not sure, but doesn't matter if I open the gas cap and close it again while going down the road (I've read that on the POOGS post). I've also tried switching between ON and RESERVE on my petcock (has OFF/ON/RESERVE on it). No improvement. I kept riding and it didn't seem to get any worse (or better) after a 2 hour ride like that yesterday. (FYI - I'm getting about 38 mpg like this.) Just had me worried with it sputtering all the way.
I'm thinking I should try syncing the carbs. I did not do it after the rebuild because it idles and accelerates so well. Also thinking of replacing all spark plugs. I recently replaced the cap on the plug under the throttle cables because it was arcing.
Speaking of plugs, all are either greyish or light brown/tan. Seems like I remember the #1 cylinder were more greyish and #2 cylinder were more brownish/tan.
I'm really stumped as to what to try next. Need HELP please?!?
Last edited by CDUB; 07-12-2010 at 12:42 PM.