Re: Yamaha XS650 twin

 Dave wrote:

Well, how old is it? I can't tell you how to fix it if you don't say what
year it is in the first message.


Could be, or maybe the points need cleaning and adjusting or maybe the carbs
are gummed up.

Remember that we were talking about 180-degree, 360-degree and 270-degree
crankshafts?

Here's a guy that has rephased his crankshaft to 277 degrees for a smoother
engine.

http://www.650motorcycles.com/XS277kit.html

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1980.  Sorry.


I'll have a look at the points and check the gap after I stick a new plug
in.  Never have replaced the plugs on that bike.

 
I mean I WOULD have looked at the points if the bike didn't have electronic
ignition.  Oops.

 

I'd expect this, if the right hand pot wasn't running right.


Just an engine waking after a long sleep.....


So leave it alone. If it ain't broke, don't fiddle with it.

Lovely bikes, btw. I've owned four or five and want another.


--
BMW K1100LT  750SS  CB400F  CD250  SL125
GAGARPHOF#30 GHPOTHUF#1 BOTAFOT#60 ANORAK#06 YTC#3
BOF#30 WUSS#5  The bells, the bells.....

 Less volume out might mean less volume in, from a sticking carb slide maybe?
Or reduced pumping efficiency caused by leaking valves or stuck rings?