OzVMX Forum

Clubroom => Tech Talk => Topic started by: shelpi on February 10, 2013, 01:47:26 pm

Title: one for the carby Guru's
Post by: shelpi on February 10, 2013, 01:47:26 pm

when putting a set of chambers onto a two banger what carburetor perameters should be changed?
ie main jet, idle (pilot) jet etc ?

Title: Re: one for the carby Guru's
Post by: Honda Hoarder on February 10, 2013, 02:49:37 pm

Set of chambers ?
The pilot and the needle clip air screw also
depends on the pipe top end/ low end etc
More info needed

Title: Re: one for the carby Guru's
Post by: shelpi on February 10, 2013, 03:11:54 pm

we are aiming for bottom end to mid range :o so chambers (now made) are not dissimular to the chambers made by the Brits wwwhiggspeed.com  Higgspeed performance products,
  mikuni vm32sh    carbs now at
               mj   110- 112.5
              pilot  30
             
recommended so far
             mj   170-  220
         pilot     30- 35
 4th clip on needle if to rich go one size richer on the needle jet

   update just cam in from hvccyle
r5 350 (piston port) stock pipes mj:125-135,  pilot: 30- 32.5,  needle clip pos: 3
r5 350 (piston port) dg pipes    mj: 130- 145,  pilot: 32.5- 35,  needle clip pos: 2
r5 350 (piston port) performance pipes mj: 140-155,  pilot: 32.5-35  needle clippos: 3

start rich and work down    :P IS THIS A GOOD PLACE TO START?  CHEERS               

Title: Re: one for the carby Guru's
Post by: shelpi on February 10, 2013, 06:06:29 pm

So please let me know if I am in the Ball park  ???  cheers

Title: Re: one for the carby Guru's
Post by: TT5 Matt on February 10, 2013, 07:34:20 pm

yeah best to start very rich and work down,that way you dont cook your motor ;)