ViragoTechForum.com :: Yamaha Virago XV Forums That Rock!!!

#1:  Idles Fine, stalls when I apply throttle. (SOLVED) Author: jbanks,  Posted: Tue Aug 31, 2010 11:14 am I just got my bike a little bit ago. It sat for 16 years and I have been restoring it. It starts fine and idles at the appropriate rpm. I rebuilt the carbs and replaced all the hoses. However, if I try to give it throttle, it stalls. The worst part is that this is not a consistent problem. It may work one day, and then not work another. PLEASE HELP!!!!!!!!

#2:   Author: 48vintage,  Posted: Tue Aug 31, 2010 11:47 am It would be of great assistance if you would fill in your signature w/ the make - model of your bike - http://viragotechforum.com/viewtopic.php?t=20037

#3:  Re: Idles Fine, stalls when I apply throttle. Author: Setarian,  Posted: Tue Aug 31, 2010 5:58 pm I have the same (if not very similar) problem. My brother bought a 1983 920 midnight virago. We have got the bike to pristine condition, it's really good looking! However, just as OP said, I can start it with the choke closed, and it idles beautifully, but open the choke or give it any throttle at all and it kills. I have removed and inspected the carbs, they were astonishingly clean for a bike that sat for 6 years. I'm stumped, any ideas?

#4:   Author: grazingazer,  Posted: Tue Aug 31, 2010 6:39 pm check for clogged filters...there's 2 in the tank and 2 in the carbs...i'd check the tank's first

#5:   Author: Setarian,  Posted: Tue Aug 31, 2010 11:17 pm Is there a diagram or picture on where to find these filters? I had the carbs all the way off and dissassebled and didn't see anything resembling a filter or a screen. Are the filters in the tank associated with the petcock?

#6:   Author: jbanks,  Posted: Wed Sep 01, 2010 12:05 am Sorry I forgot to change the post when I put it up. I have an 85 xv1000. All the filters have been replaced and I still can't figure it out.

#7:  Re: Idles Fine, stalls when I apply throttle. Author: Setarian,  Posted: Wed Sep 01, 2010 6:02 pm anyone else? I cant find any filters in the carbs, and the problem is unresolved.

#8:   Author: grazingazer,  Posted: Wed Sep 01, 2010 6:10 pm the tank filters are attached to the petcock[s]...did you remove the needle seats and look behind them?...t is not unusual for the diaphragm air filters to clog the needle seat screens with trash

#9:   Author: Setarian,  Posted: Wed Sep 01, 2010 6:40 pm im draining the tank to take a look, ill pull the carbs off again and take a look behind the seats

#10:   Author: Setarian,  Posted: Wed Sep 01, 2010 7:11 pm all filters are 100% clean, suprisingly in fact. is there anything else i should check before putting the carbs back on? now i did notice that the mixture screws were WAY out... almost 4 or 5 turns. I put them back to 2 1/4 turns. could that affect it in any way? also, could this be a synch issue?

#11:   Author: Setarian,  Posted: Wed Sep 01, 2010 8:12 pm its a full miss on the front cylinder, spark is present. i left it idle for 5 minutes and accidentally touched the front exhaust pipe... but it was cold.

#12:   Author: grazingazer,  Posted: Wed Sep 01, 2010 8:54 pm what's the plug look like...is it getting fire

#13:  Re: Idles Fine, stalls when I apply throttle. Author: Setarian,  Posted: Thu Sep 02, 2010 12:01 am ive actually never seen it before, but the spark plug is broken internally, with no fouling. im going to pick up a new one tomorrow and hopefully that will fix it

#14:   Author: Matthew,  Posted: Thu Sep 02, 2010 12:10 am this needs split into two post

#15:   Author: jbanks,  Posted: Thu Sep 02, 2010 2:31 am I actually figured it out. After checking the filters and everything I realized it had to be the mixture screws. After adjusting them and making sure the pressure was good and both pipes were warm I adjusted the throttle screw. Put some new gas in it, and made sure the throttle cable didn't have too much slack. Everything works amazing now!

Generated using printer-friendly.
All times are GMT - 4 Hours
Page 1 of 1