Moped Riders Association Forum Index Moped Riders Association
Official Online Home of the IAAMR
  International Association for the Advancement of Moped Riders
  FAQFAQ    RulesRules    SearchSearch    LinksLinks   RegisterRegister 
  ProfileProfile    MemberlistMemberlist    Private MessagesLog in to check your private messages    Log inLog in 
  Moped ForumsMoped Forums  Moped RepairMoped Repair  MRA StoreMRA Store  CalendarCalendar   

Yamaha QT50 Has problem !

 
Post new topic   Reply to topic    Moped Riders Association Forum Index -> Scooter Riders
Go to Bottom   View previous topic :: View next topic  
Author Message
BarnEagle
Net Rider


Joined: 28 Aug 2011
Location: United States
PostPosted: Mon Aug 29, 2011 2:20 pm    Post subject: Yamaha QT50 Has problem ! Reply with quote
Working on my friends QT50 1985 vintage. When I switch the key from start to run, the engine goes full speed. I switch the key back to start and will idle all day. Any clues to what is happening? This machine has 1500 miles on it and looks brand new. I suspect the carb is shot, but there might be something else to check. All adjustments have been made according to manual. Help!
_________________
BarnEagle
Back to top
View user's profile Send private message
maddog
Net Rider


Joined: 29 Sep 2005
Location: u.s.
PostPosted: Thu Sep 01, 2011 9:37 pm    Post subject: re: Yamaha QT50 Has problem ! Reply with quote
make sure the half moon side of throttle slide faces the air filter...
_________________
Some people dream about speed! blink and im gone!
Back to top
View user's profile Send private message
xrongor
Net Rider


Joined: 15 Nov 2005
Location: montana
PostPosted: Tue Sep 27, 2011 12:27 am    Post subject: re: Yamaha QT50 Has problem ! Reply with quote
thats exactly what the start position is supposed to do. limit the rpm's. when you put it in run it removes the limiter. This is not a function of the carb.

all adjustments to the carb need to be made with the key in the run position. my guess is you have the idle screw turned in too far or the cable is frozen/broken.

randy
_________________
"In this world there's two kinds of people... Those with loaded guns, and those who dig." -- Blondie to Tuco
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    Moped Riders Association Forum Index -> Scooter Riders All times are GMT - 5 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You cannot download files in this forum


Powered by phpBB 2.0.22 © 2001, 2002 phpBB Group