« previous next »
Pages: [1]

Author Topic: pilot jet  (Read 5319 times)

Offline raptorkev

  • Advanced Member
  • ***
  • Posts: 17
  • Karma: +0/-2
    • View Profile
    • Email
pilot jet
« on: July 31, 2011, 02:34:53 PM »
hi all what size is the pilot jet in the mk1 amal 30mm
Logged

Offline Rex

  • Advanced Member
  • ***
  • Posts: 1534
  • Karma: +11/-69
  • I love YaBB 1G - SP1!
    • View Profile
Re: pilot jet
« Reply #1 on: July 31, 2011, 05:31:59 PM »
They used to be 25s, but now they're an unremoveable bush inside the carb, and apparently the size doesn't matter... ;)
Logged

Offline rogerwilko

  • Advanced Member
  • ***
  • Posts: 259
  • Karma: +6/-36
    • View Profile
    • Email
Re: pilot jet
« Reply #2 on: July 31, 2011, 08:56:59 PM »
I will not respond to that....wait a minute.. i just did!!
« Last Edit: July 31, 2011, 08:58:42 PM by rogerwilko »
Logged

Offline chaterlea25

  • Advanced Member
  • ***
  • Posts: 410
  • Karma: +14/-3
    • View Profile
Re: pilot jet
« Reply #3 on: August 01, 2011, 05:23:04 PM »
Hi,
The answer is, "Too Small"
its about 0.015 in. dia
And yes it does matter >:(

HTH
John
Logged

Offline davidg

  • Advanced Member
  • ***
  • Posts: 10
  • Karma: +0/-0
    • View Profile
Re: pilot jet
« Reply #4 on: August 02, 2011, 01:48:17 AM »
its .014" and you can clean it carfully with a number 78 drill through the air adjuster screw hole.
Logged

Offline phil_h

  • Advanced Member
  • ***
  • Posts: 20
  • Karma: +0/-0
    • View Profile
Re: pilot jet
« Reply #5 on: August 10, 2011, 10:05:03 PM »
I recommend you drill out the bush and fit a 30 pilot.
With modern 10% ethanol fuel you need another 5% by volume compared to old fuel so all old jetting tables are now wrong.
And what's the biggest prob with amals ... they run weak pilot circuits very quickly because of wear in the crap alloy !
I know the calcs are marginal, but I'd rather have a slightly rich pilot to aid starting and idling myself !
I'm converting all my fleet to run richer pilot circuits.
Logged

Offline toz

  • Advanced Member
  • ***
  • Posts: 16
  • Karma: +0/-0
    • View Profile
Re: pilot jet
« Reply #6 on: August 11, 2011, 10:55:16 AM »
Gave mine a bit of a poke out last week, the improvement in the smoothness of the running and tickover has been amazing. Engine runs a lot cooler too it seems,It may have been slightly blocked and running too lean.
Logged
Pages: [1]
« previous next »