Hi chaps, I'm having bother with my 650 and could do with suggestions.
I've only done 4 trips (75 miles) since it's back on the road. Firstly, it's always a pig to start - usually needing to be jumped off the van battery.
Once started it'll run OK.
Trip 1: ran great for 40 miles
Trip 2: after 5 miles, after starting again it went on 2 pots. 1 and 2. 3 and 4 were stone cold.
Trip 3: ran OK, took ages to start though
Trip 4; same as trip 2 - went on 2 pots. Limped home being overtaken by mopeds.
I've eliminated poor compression because it runs OK sometimes, not ignition either because 3 and 4 not working (instead of 1,4 or 2,3)
Thinking there may be blockages in the carbs, I stripped them, blasted all the channels with compressed air and fitted new jets etc.
Yesterday it refused to start. 15 mins or so of cranking with the occasional DUF as the engine overtook the starter motor. I didn't even get a DUF DUF or DUF DUF DUF. Sparking OK, air filter not blocked.
The petrol hasn't gone off bacause the 400four started 1st prod with older petrol but it is a Honda so no surprise there.
I'm thinking it may be the carbs need to be ultrasonically cleaned but I've run out of ideas really.
Where do I go from here?