Hey guys was wondering what size dyno jet needle ect. settings i should use on my bike. Just got around to installing a K&N filter with pre cleaner and lid off. The screws are hard to find that keep the bowl on and strip easy so i wanna get this right. im 400ft above sea level as well. thanks guys

 

I'm running a 165 Mikuni main on mine with the exhaust, no lid, and UNI filter, running a tad on the rich side, but it runs good. That's a 176.0 Dynojet... Chart

Also, when you take the 4 screws out of the carb, take one down to the hardware store and grab some hex-heads to replace the screws (be sure to put a dab of "never-seize" on the threads)

 

<div class="FTQUOTE"><begin quote>Originally posted by: warrior226
Also, when you take the 4 screws out of the carb, take one down to the hardware store and grab some hex-heads to replace the screws</end quote></div>

That's a darn good idea!

 

Anyone else familiar with my situation. I dont have it piped just the lid off and new air filter.

 

I'm pretty good at jetting, but have no idea about dynojet numbers. I usually drill my jets with numbered drill bits. Start lean and drill until it runs right.

You probably don't need to change the taper of your needle, just move the clip down to pull the needle out of the hole some. If you get to the last clip position, then you may need a new needle or bigger needle jet.

If your carb is a CV carb (which it probably is), just go ahead and beat your head against a wall.

 

Ok so i started at a 150dj and got the bike running. the only problem is it wont idle and needs gas to keep going. Im assuming the pilot jet needs to be turned out or am i to high with the mj and need to back it down to say a 144 or so?

 

If you have it running great, and the ONLY problem is it won't idle, then turn the idle mix screw until the idle goes up and then back down.... Then find the spot in the middle where the rpms are the highest. If you can't find a spot in the middle (ie. you keep turning till the screw comes out or seats and the rpms keep going up), then you need a bigger/smaller pilot jet.

If your top end is great, but midrange is so so and it won't idle, you may need to monkey with the needle clip for a while before coming back to the pilot and the mixture screw. I always set everything lean at first, that way it won't run very well and will cutout and not take throttle until you get it richened up enough. If you start rich, its hard to tell if you need to go richer or leaner. The only symptom of being rich is loss of power.... and that's hard to gauge.

The main jet should have nothing to do with the idle.... And very little to do with midrange. I can drill a main out with a 1/8 inch drill and still ride around happily in midrange all day. I just can't open it up all the way, it just won't have much power. But if the main is too small, I can't ride at all. All it will do is idle.

 

By idle mix screw im assuming that would be the black **** on the outer low end of the carb. Ill tinker with that and post back to ya.