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ViragoTechForum.com General Help Idles Fine, stalls when I apply throttle. (SOLVED)

#1:  Idles Fine, stalls when I apply throttle. (SOLVED) Author: jbanks Post 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 Post 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 Post 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 Post 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 Post 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 Post 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 Post 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 Post 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 Post 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 Post 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 Post 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 Post 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 Post 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 Post Posted: Thu Sep 02, 2010 12:10 am

this needs split into two post

#15:   Author: jbanks Post 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!
ViragoTechForum.com General Help Idles Fine, stalls when I apply throttle. (SOLVED)


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