jets

[novatracker]

what sized jets should i use for my 1.4sr with twin 40's, sri head, kent nvo63 cam, 4branch and full systeam fitted to it?:confused:

[Adam]

Go to a rolling road, and they will fit the best suitable jets.

[novatracker]

what about geting it running first?

[Adam]

What jets,chokes etc do they have in atm?

[novatracker]

got 30mm chokes and needing ta heck the jets. does it tell u on them?

[Adam]

Think it does yeah.
30mm chokes sound about right for a 1400 8v.

[novatracker]

carb deteails carb1= tipo:40DCOE144 No:4M 101
main jet:120 x2 idle jets 11ev 57f21

carb 2=tipo:40DCOE143 No:4M 101
main jet:120 x2 idle jets 11ev 57f21

with 30mm chokes
are they any good?

[womble sri]

should run on them but the RR will change them about to get the best from your engine think they charge about a tenner for 4 jets when you exchange your old ones as long as there not damaged. i had a similar spec to yours bar the cam and i had 124 mains and 55 idle the first time. changed them the secon time think they were 134? and the idle was a smaller jet i think dosent say on the second invoice

[novatracker]

ok thanks. iv found a set of trumpets which are 45mm internal but my carbs are 40 will this be ok or will it cause to much air trubuless (spelling) in the manifold and slowing air flow??

[Stuart]

general rule of thumb is 4* the choke diameter is the main jet size..