1891
CB500/550 / Re: It won't start!
« on: March 11, 2008, 07:50:38 PM »
Ok the mystery deepens;- cylinders 2&3 suck air in the normal way (though weakly) and have damp plugs.
1&4 appear dryer and blow air quite stongly back thru the carbs putting lots of fuel in the airbox, like great clouds of it. The engine is something of a curiosity in itself by the way. It has no stamped number in the usual place, and a number has not been erased either, what it has instead is a silver sticker nearby which says 'honda assighned engine no.'
I'd be expecting all 4 cylinders to suck air from the carbs with equal enthusiasm, not blow air out of the inlet. Could it be possible that I've ended up with an odd shaped crank or camshaft? the valves are all opening and closing fully.
I've rebuilt 550 engine's in the past and never seen anything like it, Not that Ive checked if cylinders are blowing air bach thru the inlet...
Seems the engine is a bit of an odity to me. It simply isn't possible to put in any parts the wrong way appart from valve timing which I've checked. The camshaft cut out faces foreward and is flush with head top face when 1&4 tdc timing (T) mark is is lined up. However there is no knowing what a past owner may have done. Could be a case of full engine strip down........... Damn
Anyway Thanks All for the advice. Ps anyone know of the origins of an engine with no stamped number? could it be a warrantee replacement set of cases or something?
1&4 appear dryer and blow air quite stongly back thru the carbs putting lots of fuel in the airbox, like great clouds of it. The engine is something of a curiosity in itself by the way. It has no stamped number in the usual place, and a number has not been erased either, what it has instead is a silver sticker nearby which says 'honda assighned engine no.'
I'd be expecting all 4 cylinders to suck air from the carbs with equal enthusiasm, not blow air out of the inlet. Could it be possible that I've ended up with an odd shaped crank or camshaft? the valves are all opening and closing fully.
I've rebuilt 550 engine's in the past and never seen anything like it, Not that Ive checked if cylinders are blowing air bach thru the inlet...
Seems the engine is a bit of an odity to me. It simply isn't possible to put in any parts the wrong way appart from valve timing which I've checked. The camshaft cut out faces foreward and is flush with head top face when 1&4 tdc timing (T) mark is is lined up. However there is no knowing what a past owner may have done. Could be a case of full engine strip down........... Damn
Anyway Thanks All for the advice. Ps anyone know of the origins of an engine with no stamped number? could it be a warrantee replacement set of cases or something?