Emulsion tubes & jet positions in UK NC30
Posted: Thu Jun 11, 2020 10:01 am
Hi all,
Hope you are safe & well, can any expert advise me on the following direction I should take I have a UK NC30 that is fitted with:
122 at the front with 4+1 hole emulsion tubes
120 at the rear with 4 hole emulsion tubes
My questions to the experts are would you change this current placement of the emulsion tubes and would you run a bigger jet in the rear has anybody got any experience on this. My issue after a layup the carbs have been cleaned and blew out with an air line and are confident they function as they should but its lost its urgency to pull as hard as it used to its flat from say 9 onwards it will eventually get to redline in lower gears. The bike has always been reluctant to pick up from idle you could kill it easily if you are to quick when twisting to quick however when running on the road it has been totally faultless.
I have just brought the valve clearance within tolerance, fresh fuel, balanced the carbs to perfect, it starts and ticks perfect picks up quick from idle in neutral the bike does respond to throttle openings but its lost its pull and I hesitant from 9 k with coming and going of power. in the lower gears I can get it to redline.
I have some new slightly bigger main jets on the way that will give me two size options to try and also some new needled to try from Rick regarding the current placement of the emulsions tubes and bigger jets to the front he has suggested I ask the wider forum for thoughts and views & hopefully experience on what will work the best, as you can imagine I want to set it up the best way I can the bike is standard in every way apart from a viper can that has been shortened slightly by about 40 mm.
The float heights are all now set to 6.8 mm ready, I took the two rear spark plus out to find one was a light tan colour which I believe is right and the other was very very pale with next to now colour on it.
Fire away guys, I am not a mechanic but I can manage with this job ok so be gentle with me...…………….
Thanks in advance
Hope you are safe & well, can any expert advise me on the following direction I should take I have a UK NC30 that is fitted with:
122 at the front with 4+1 hole emulsion tubes
120 at the rear with 4 hole emulsion tubes
My questions to the experts are would you change this current placement of the emulsion tubes and would you run a bigger jet in the rear has anybody got any experience on this. My issue after a layup the carbs have been cleaned and blew out with an air line and are confident they function as they should but its lost its urgency to pull as hard as it used to its flat from say 9 onwards it will eventually get to redline in lower gears. The bike has always been reluctant to pick up from idle you could kill it easily if you are to quick when twisting to quick however when running on the road it has been totally faultless.
I have just brought the valve clearance within tolerance, fresh fuel, balanced the carbs to perfect, it starts and ticks perfect picks up quick from idle in neutral the bike does respond to throttle openings but its lost its pull and I hesitant from 9 k with coming and going of power. in the lower gears I can get it to redline.
I have some new slightly bigger main jets on the way that will give me two size options to try and also some new needled to try from Rick regarding the current placement of the emulsions tubes and bigger jets to the front he has suggested I ask the wider forum for thoughts and views & hopefully experience on what will work the best, as you can imagine I want to set it up the best way I can the bike is standard in every way apart from a viper can that has been shortened slightly by about 40 mm.
The float heights are all now set to 6.8 mm ready, I took the two rear spark plus out to find one was a light tan colour which I believe is right and the other was very very pale with next to now colour on it.
Fire away guys, I am not a mechanic but I can manage with this job ok so be gentle with me...…………….
Thanks in advance