agent laraby
XS400 Enthusiast
Hi so i have done full rebuild on one of my xs360 motors and it just isn't firing with the choke on and actually tries to start with the choke OFF.
so here the is list of the pot build tune up and and things I have checked to cut down on specualtion
full rebuild new valves cut in, new rings pistons, big end, etdc rebore at .75 155 psi cold compression test both pots so the re is no compression issues
valve clearances set to spec and re checked on LT and RT
timing chain cog and cam spigot set to 12:00 o'clock (lobes down )
condenser tested and in spec
Coils tested and in spec primary and secondary.
reasonably new contacts cleaned and gapped to spec
Static timing bang on on LF and RF
fresh fuel direct from container with vacuum line capped as well as carb boot cap on So not running petcock (which was recently replaced any way)
Stock position stock jets with stock boxes.
Float height set set to manual specs
Tried two sets of carbs with no change so doubt its carbs, carbs ultrasonically cleaned as well.
coil to points leads checked for correct firing order.
bike bike ran prior to rebuild but had clutch bearing that went after rebuild that screwed a fresh rebuild so this is rebuild #2
Battery is new
So thought I would ask here as it seems to have got me scratching my head more than normal
I'm definitely missing something it seems like timing as I think fuel can be ruled put after running 2 sets of cleaned carbs with stock jets.
Any thought form the XS400 hive mind would be greatly appreciated
so here the is list of the pot build tune up and and things I have checked to cut down on specualtion
full rebuild new valves cut in, new rings pistons, big end, etdc rebore at .75 155 psi cold compression test both pots so the re is no compression issues
valve clearances set to spec and re checked on LT and RT
timing chain cog and cam spigot set to 12:00 o'clock (lobes down )
condenser tested and in spec
Coils tested and in spec primary and secondary.
reasonably new contacts cleaned and gapped to spec
Static timing bang on on LF and RF
fresh fuel direct from container with vacuum line capped as well as carb boot cap on So not running petcock (which was recently replaced any way)
Stock position stock jets with stock boxes.
Float height set set to manual specs
Tried two sets of carbs with no change so doubt its carbs, carbs ultrasonically cleaned as well.
coil to points leads checked for correct firing order.
bike bike ran prior to rebuild but had clutch bearing that went after rebuild that screwed a fresh rebuild so this is rebuild #2
Battery is new
So thought I would ask here as it seems to have got me scratching my head more than normal
I'm definitely missing something it seems like timing as I think fuel can be ruled put after running 2 sets of cleaned carbs with stock jets.
Any thought form the XS400 hive mind would be greatly appreciated
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