Anyway I wanted all the goodies from it so it was broken and sold off bar the goodies..........including these carbs.
I've never touched them until recently and I think I might have found why the bike did not run well.
I'ts something I'm sure I've mentioned before but now I have a pic or two.
No amount of messing with float heights will fix this problem and as it's a cheap easy fix it might even be a good idea to just do this as a matter of course with a carb overhaul or service........and it might just save a lot of expensive dyno time.....................
Heres the inside of the float bowl
And here it is with the float and needle valve removed note the circled needle valve seat.
Remove the cross head screw and pull the seat out. If it's been there a long time and the carbs have been sitting dry it will be stuck
Here we have the needle seat removed note the little O ring this O ring can dry out and get brittle and hard and it will pass fuel thereby bypassing the needle valve carbs will flood and the result will be poor running.
Note also the is a fine mess filter on the seat this is the last line of defence so worth effort to check and clean it too
Allens performance will have the little O rings and the same issues can arise with CVs
Hope thats clear enough and useful
