YDS7Paul Posted August 31, 2015 Share Posted August 31, 2015 Hi all I am still having trouble with my 1977 XS250 starting. The bike is a standard 250 with matching engine and frame numbers but has 400 barrels and head, the carbs are standard 250. First of all I was convinced it was the carbs but after exhaustive work on them and speaking to other people I am now not so sure. My last efforts were to remove the starter motor and have it checked, that was ok. Then someone who used to own one and had done the same 400 top end swap suggested changing the condenser(s). I done this Saturday and still no joy. Any theories would be welcome as I am running out of ideas. Link to comment Share on other sites More sharing options...
Johannes Posted August 31, 2015 Share Posted August 31, 2015 Hi I am new to the forum but have you checked you are getting a spark at the plugs? Is the engine firing or not? Link to comment Share on other sites More sharing options...
YDS7Paul Posted August 31, 2015 Author Share Posted August 31, 2015 Hi yes I have a spark at the plugs and the bike will eventually run. It just takes so long to start, so long that you would drain the battery before it started. Once running it is not too bad but even when warm if you turn it off it is very difficult to restart. Link to comment Share on other sites More sharing options...
blackhat250 Posted August 31, 2015 Share Posted August 31, 2015 DO a compression test , 3 things needed to start. Spark/fuel [ you have both] and GOOD compression,, Link to comment Share on other sites More sharing options...
YDS7Paul Posted August 31, 2015 Author Share Posted August 31, 2015 Yes I have done a compression test and it was really good. Link to comment Share on other sites More sharing options...
up.yours Posted August 31, 2015 Share Posted August 31, 2015 (edited) is it gapped right, plugs and points. clean air filter, make sure you have good fuel feed too. Edited August 31, 2015 by up.yours Link to comment Share on other sites More sharing options...
jimmy Posted September 1, 2015 Share Posted September 1, 2015 Its an xs250, they do that...Burn it 1 Link to comment Share on other sites More sharing options...
YDS7Paul Posted September 1, 2015 Author Share Posted September 1, 2015 Knowing my luck the fire would go out ! 3 Link to comment Share on other sites More sharing options...
Moderator Cynic Posted September 1, 2015 Moderator Share Posted September 1, 2015 Look on the bright side, its better than a Z250.........um! Link to comment Share on other sites More sharing options...
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