My 01 yami xl 800 has about 70 ohours n it and all this year,when i take off it been hesitating, and not going as quick, onece im up tho, its fine, i changed the plugs they are OK, some told me it could be my high speedc or low speed screws? is that sound right?? I new on this riva bored, i had the same topic at sd.net but it kinda died and i didnt get many help, thanks!!

JD

have you looked at your powervalves, Did you have them serviced or serviced them yourself? 70 hours is plenty, the valves are possibly dirty and sticking. Be very careful with this they are prone to failure.

I AGREE, POWER VALVES FIRST, THEN A LITTLE BIT OUT ON THE HIGH SPEED JET, CAUSE THE BEST PERFORMANCE IS "FAT ON THE BOTTOM, LEAN ON TOP". RUN SOME AMOCO 93 ALSO TO CLEAN PUMPERS / JETS.
JR

if the boat has been running well do not touch the carbs until you have determined the problem does not lie elsewhere. Most of all you don't want to lean it out just "because".

if it is hestitating, wouldn't sticky PVs normally stick in the down position? Why would that cause hesitation?

I dont want to play around with the carbs... I dont do complicated stuff like that, what would running 93 octane do for me, have you guys ever heard of gumout?? some said it could be i am 'gummed' up in the speed screws or summin and gumout could fix that if i poor it in my gas can.??????? thanks for the help, should i have the valves serviced or something. Are you posed to have a 50 hr service...? cause it doesnt say i have to in the manual...
and i didnt have my 10 hour service done last year til i winterized it, but it was done....so that wouldnt make a difference...right???

Tanks guys...
JD