Re: XS750 Starting problem - Help Pleeaassee

 

hi i have a xs750 i can not get it to start its ben siting for some time i
cleaned the carb and changed the spark plugs please help

 



Try cleaning the other two carbs?



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Trophy 1200 (Doctored)750SS CB750F2 CB400F CD200 ST70 DT50MX
GAGARPHOF#30 GHPOTHUF#1 BOTAFOT#60 ANORAK#06  YTC#3
BOF#30 WUSS#5  The bells, the bells.....

 

It may sound stupid, but check to see if the petcock is flowing fuel
correctly. Yammi's work on a vacuum feed, so all the hosed need to be hooked
up right. If I remember right, the XS 750 has 3 lines coming off the
petcock.
 You say you cleaned the carbs, but what did they look like inside?  If the
bike has set awhile, you might need to get them "boiled out", and check all
the little tiny jets inside, and the needle and seats. The float settings on
Yamaha carbs is very critical.
 Finally, check to make sure you have a good strong spark. On Yammi's, if
any part of the ignition is week, you will have less spark
 I used to have one of those, and one day it wouldn't start.  I checked the
fuel, the spark, and all kinds of things.  The bike wouldn't fire until I
put a new starter solenoid on it, then it came to life.
Also, my Son has an XS 400 that will not start with the elec. starter,
Period. But 3 or 4 kicks and it will always start.

 



The XS400 twin was notorious for this (I've had a couple).


--
Trophy 1200 (Doctored)750SS CB750F2 CB400F CD200 ST70 DT50MX
GAGARPHOF#30 GHPOTHUF#1 BOTAFOT#60 ANORAK#06  YTC#3
BOF#30 WUSS#5  The bells, the bells.....

 Make sure the petcock is in the "prime" position and that the battery is
really good.  The XS750 can be a bear to start if the battery isn't perfect.
The battery for this bike has very little reserve capacity and if you run it
down even a little bit trying to crank a cold motor you may never get the
bike started If mine sat for more than a day or two, I would always kick
start it initially.  Also once the choke is set DO NOT touch the throttle
when trying to start!
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-WJB