Thread: gz250 mileage
View Single Post
Old 09-18-2017, 10:07 AM   #63
alantf
Senior Member
 
alantf's Avatar
 
Join Date: Nov 2008
Location: Tenerife (Spain)
Posts: 3,715
Quote:
Originally Posted by Zeke View Post

What is the difference between on and primary then?
It's not primary, it's prime. In run the petcock is closed until vacuum from the engine (during and after starting) opens the petcock and lets fuel into the carb. When you switch off, the valve shuts and cuts off the fuel. Prime allows fuel to flow all the time, and is used (for example) when the bike's been stood for a long time, and the carb bowl is empty. Then, you'd start in prime and switch to run when the engine's running. If you leave it in prime, fuel will keep flowing while the bike is stood, and fuel could leak into the engine, and possibly contaminate the oil.

Another thing... Why would you possibly want to ride in reserve all the time? Just doesn't seem to make sense.
__________________
By birth an Englishman, by the grace of God a Yorkshireman.



Login or Register to Remove Ads
alantf is offline  
Reply With Quote