Skip to content

Ask an Expert zepher550 fule/air mixur screw and stop screw setings Technical

You are in... Forums > Ask an Expert > Technical > zepher550 fule/air mixur screw and stop screw setings

Got something to say?

Got something to say?

Go to most recent reply



Dec 12

Posts: 1

zepher550 fule/air mixur screw and stop screw setings

need help ore shuld i say a starting point

what should the settings be on a zepther 550

for the air / fule mixture screw and the stop screw ?

it wold be good to get some help on this ,

Reply to this Topic  
  • Posted 2 years ago (19 December 2012 04:04)

Post a message in Technical

Fields marked with an asterisk * are required


Please note. You cannot submit more than 4000 characters as a message.

Upload image(s) from your computer (up to 3 images)


Terms of use

Use of our community areas and forums is subject to important terms of use. By joining our community and using the features you agree to be bound by these terms. See terms of use below. 



Nov 07

Posts: 2433

smidget says:

Hi zepher500percy

Stop screw, back off till no movement of throttlke butterfly, then turn inward till you start to get movement of butterfly, then adjust as required from there.

Fuel mixture screw setting I am not sure of but I would try as follows.

Screw in till stop, do not use force, then back out one and a half turns, if engine does not show any sign of firing I would back out, then a further quarter turn until you reach three full turns out. You should not really need to go the full three turns, if you do I would suggest checking other reasons for a none start.

Hope that helps a little. 

Reply to this Topic


Compare Insurance

Save money by comparing quotes. It's quick and easy

Motorcycles for sale


It's only £13.99 to advertise your motorcycle on MCN

Sell your Motorcycle

Motorcycle pricing tool

New! Find used bike prices