650 typical engine problems?

chopdxS · New Member Joined: May 24, 2006 Posts: 1

well here it is.. i got a 650 and it wont start... ive rebuilt the carbs and such.. but still wont fire over.. i dont know anyone with a 650 or anyone who knows bout em since im a xt500 guy.. can anyone tell me typical problems that need repair..when i bought it i kicked it over and it started then i turned it off and never agian did it stay started like that... it used to only bairly stay running for 5 seconeds with starting fluid.. but it sounded strong when it started the very first time..without the rebuilt carbs.. and it deff wont start with the electric start please email me at justingeturgun @ yahoo.com .. thanks i will get some pics up asap .. its a custom chopper with a drop seat frame sort of detriot bros style..

threeballtony · Full Member Joined: Apr 13, 2006 Posts: 20

this may sound stupid but did you check the battery charge/voltage the 650's need a hot battery to run, also check your connections for grounded /shorted wires thats my two cents worth Tony

jayel · Posted: May 25, 2006, 9:31 am Post subject: Re: 650 typical engine problems?

make sure the points and coil(s) are firing the right cylinder

Wulf · Posted: May 25, 2006, 9:06 pm Post subject: Re: 650 typical engine problems?

Three things are required for any gas engine to run:
1 Spark at the right time
2 Good fuel/air mixture
3 Good compression

Check in that order. Also don't be fooled by thinking that 12 volts is fully charged and "good enough". A fully charged battery consist of 6 cells with a charge of 2.1 volts per cell, total charge is 12.6 volts. A battery with 12.5 volts is considered 75% charged (supprising huh?) At 12.4 volts the charge is actually 50%, and at 12.3 volts the battery is only 25% charged. Anything less is considered 100% discharged. So as threeballtony said, check battery voltage.
Wulf

79xs650 · Posted: May 27, 2006, 2:17 pm Post subject: Re: 650 typical engine problems?

I sorta had the same problem...it wouldnt start with the starter button, but it would after a few tries with the kick start...found out you need a very good battery....I am a battery guy and I found out that if u use the CB14L-A2 battery its actually more powerful than the manufacturer recommended one. Now it runs better than ever...goodluck

What Happened to 650rider.com?

Yamaha xs650