This was going to be a MK1 rebuild post but the piccys (that I could find) are too big so I will try to reduce the size and try again--But in the meantime this may be of intrest to some of you.
When getting the bike running again first off it didnt want to start then ran rough tick over all over the place so a couple of carb cleans later it was starting and tick over was ok but as I have a MK2 rolling chasis without carbs I looked on ebay for some MK2 carbs (was going to try them on the MK1 first) and some MK2a jobbys poped up so I got them instead and tried them on the MK1 to see what happens.
Here are the carbs on the MK1.
The inlet side pops straight on.
The air box side is bigger than the MK2 or MK1 carbs so you will need at least the MK2a airbox rubbers.
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I got a MK2a airbox with rubbers from EBay
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The holes at the bottm of the carb line up with the holes in the airbox rubbers and they are outside of the airbox rubber tube filterd air still but there must be a reason for that.
The carbs came complete with hoses and cables.
The throttle cables went straight into my throttle tube.
The choke setup Is different so I just took off the 2a cable and put the MK1 choke cable on, straight forward.
I have done 300ish miles the bike starts easey goes well no poping, banging, hesitation,just nice smooth power.
I have gone up hills in too high a gear to see if it bogs and coughes and it didnt.----No idea why my word changes here--
It seems to return 55+ to the gallon (fill tank to a point and try to fill to the same point again,not accurate but it will do).
I am using the stock diaphram type fuel pump.
It does seem to be buy it fit it and feck off on a ride-- nice.