carburation on a '62 r50

[antofagastaride]

Hi, again, after a week chasing the Dakar rally that came across my homeland ( atacama´s dessert) i´m back at office and using my r50 diary to conmute 'cause the company truck is on repairs. I have this little glitch on my "black, beauty ,beast": she starts ok at the second or third kick , (unless I left the cock open the whole nignt) and keeps a very low and beautiful idle ( pop, pop, pop.....) but when I open the trothle it's hesitates and, very often if i don´t do it very carefully, " pumping" the gas handle, the engine dies. Once I make it trough the high revs range there is no more engine stop but it always hesitates when taking load on starting the run (hope my description is understanable) by example after a traffic stop.
I´m pretty convinced this corresponds to a carburation problem but don´t know what: to much low the needles? or the fuel level? Any advice will be appreciated

regards from far away south.......

[store]

I'd be inclined to look at this in three ways, but I think you're on the right tracks already.
I'd take this as an opportunity to give the carbs a minor clean up first.
1) I'd check the pilot jets are clear (probably are if it ticks over) and there's no muck in the float chamber, it can accumulate at the bottom and raise the float hight on these. There's no real opportunity to mess about with the float hight other than change the weight of it.
2) I'd clean the fuel filter in the petrol tap. If you have an 'Everbest' tap on, it has quite a good filter on it. I'd maybe even clean out the fuel tank as part of this 'service'.
3) See how that goes and if it still hesitates, then try raising the needle.

[antofagastaride]

thanks Store! just a clarification what do you mean by "tick olver"? ( sorry english is not my strongest point)


regards from far away south..

[store]

Your English is fine for me! I suspect I'd have more difficulty communicating in your country, in your language, than you would in Britain, in English.

Tick over : When you let go of the throttle and the bike still runs at very low revs.

Thinking on, it may well be worth cleaning the spark plugs and checking the gap 0.6mm. It can only help.

I see you have noticed the slow rate the carburettors fill up with petrol when you first turn on the fuel tap. I turn the taps on 5 minutes before I start the bike.

[Rob Frankhamr]

If this is happening more when the engine is hot but not when it is cold, I would look at that the throttle mixture screws. If they are set rich, it can cause this problem.

Rob