Needle Kits

[darkbane]

My mechanic was trying to rejet my carbs to accomodate for the Open Exhaust and K&N pods. He ordered the whole range of jets for the carbs, but said that the results seemed the same no matter what jets he used. He said I'd need to get different slide needles, but couldn't find any reference for any for my '83 GS650G. Dynojet doesn't have different needles for my bike. The mechanic said that without different (more tappered) needles, different jets aren't going to matter.

Where should I look for different needles, or what model of bike should I try searching for instead to get the needles that I need?

If you guys have gone through a similar situation, I'd appreciate any thoughts, comments, or suggestions you may have for me.

Thanks

[82Shafty]

I've never heard of a more-tapered needle.

Usually stepping up two on the mains is a good start.

Make sure intake o-rings and the o-rings between the carbs are have been recently replaced.

How about the valves, have then been recently adj to spec? Start with valves, then move onto eliminating any air leaks, then move onto the tuning.

[FJman]

I hate to say it, but your mechanic is a retard.

There's like 4 circuits or so in the carbs. Isn't rocket science.

You tune your main jet to make the motor work well WOT at high revs.
The needle controls part throttle, midrange rpms.
The pilot jets controll the bulk of steady, slow cruise and idle.
The mixture screws control fine-tuning of the pilot circuit.
Fuel height kinda acts like an accellerator pump.

That's it, you're done.

http://www.factorypro.com/tech/carbtun.html

Roll with it. And find another mechanic.