What RPM does my main jet kick in?

[bakirkwold]

I have a GS450. What RPM does the main jet fully kick in? I say this because it will rev all the way to about 8 then it will stop for a for a second or two then just take off. Lots of powder at reline till about 11. I have a mac 2-1 exhaust with 117.5 main jets and the needle is .16 MM above stock. Thanks guys!

[Big Rich]

The main jet is being used as soon as the needles slide up. It's not a "what rpm" kind of thing - more of a "what throttle position" kind of thing.

What intake do you have? And I'm assuming you have the stock needles?

[bakirkwold]

Its got the stock airbox with the top on it. My experience was it ran better with the top on.

[Big Rich]

Just for general info, read this first post (it's actually a copy of a copy of a PDF or something):

http://www.dotheton.com/forum/index.php?topic=16745.0

Usually a stumble is caused from being rich. Have you tried resetting the needle to its stock position?

[bakirkwold]

Not yet. I will try that soon. And thats a good link for carb basics!

[Katarat]

Mark your throttle travel in 4 positions closed to wide open on the grip & 1 at closed throttle on the other side, that will tell you want circiut youre on

[hampshirehog]

Your main jet works at between 1000 rpm and 12000 rpm (or however high you want to fo). However, it only works when you have the throttle opened between 3/4 and full throttle.