Battery

[pastaman]

HI, I have a 81 XS1100SH. I have had a problem getiing it to run right. I have replaced just about everything and found out the other day I had a dead cell in my battery. Would this play a big part in it not running 100%? Thanks

[mro]

If when running if you have 12 + volts should run OK.
Over 2,000/2,500 rpm should be over 13 volts.
TCI requires 10 + volts to fire ignician.
Bad battey can cause problems.

replaced just about everything

How about a little detail on what you've done?
and a little bit about condition and history of your special.


mro
btw, welcome to XSland
got any pics of your bike to post

[TopCatGr58]

Yes, Welcome!

Like MRO said, TCI needs ~10.5 volts to work properly. With a dead cell, if you have 8=(1.5 volts missing), drops 12 to ~10.5 volts.....so this very well could be your problem. Relatively simple fix. Once you get a new battery IF it's still misbehaving, come on back and post a better history, symptoms, etc., and we'll have a go at it!
T.C.

[pastaman]

Thanks for your response, My Xs is in great shape. I have replaced the coils (used), volt reg, carbs, rejetted. It has a 4 into 1 and individual air filters. Vacuum diaphram has been replaced also. My battery does have a dead cell and once it charges it drops off voltage rapidly. I have worked on this bike all summer and I am about to go nuts.Any help or suggestions would be great. Thanks for your help, Jim

[fredintoon]

Hi Jim & welcome,
replace the battery for sure. Until you have the whole 12Volts available you can't possibly discover whether there is anything else wrong with the bike or not.

[pastaman]

Thanks. I will stay in touch and let you know. Thanks again