Lean COndition????

[LT_Rider]

I have a 330r and can not seem to get the jetting correct. I have a 38mm Air striker. I was wondering what would happen to my jetting needs if the bottom end was sucking air? Would my jetting seem to always need to be on the lean side? Because it seems the engine responds better to smaller jets, in my case a 150 pilot (which seems lean) and a 168 main (which seems lean and still needs to be smaller).

The top end is fresh, I am running 110 octane at 32:1, I am in the initial break in period with this engine and am trying to do a few jetting passes. I am finding that the leaner I go with the jetting, the better the engine runs, however I do not want to go to lean though.

WOT tuning is where it is most difficult, there is a 168 main but it seems that this is still to rich and the engine is sluggish and bogs with this jet. I am afraid to continue to go lower.
Thanks please help

[flotek]

Originally Posted by LT_Rider

I have a 330r and can not seem to get the jetting correct. I have a 38mm Air striker. I was wondering what would happen to my jetting needs if the bottom end was sucking air? Would my jetting seem to always need to be on the lean side? Because it seems the engine responds better to smaller jets, in my case a 150 pilot (which seems lean) and a 168 main (which seems lean and still needs to be smaller).

The top end is fresh, I am running 110 octane at 32:1, I am in the initial break in period with this engine and am trying to do a few jetting passes. I am finding that the leaner I go with the jetting, the better the engine runs, however I do not want to go to lean though.

WOT tuning is where it is most difficult, there is a 168 main but it seems that this is still to rich and the engine is sluggish and bogs with this jet. I am afraid to continue to go lower.
Thanks please help

yo udont have a 150 pilot... it is probably a 50 pilot ,168 doesnt seem too terribly off , just becasueits a big bore doesnt mean it is going ot be drasticlly different thqan other 250 setups.Iwouldnt be afraid to go down a couple sizes til lit clears up,just keep a close eye on the plug and listen to what it wants

[LT_Rider]

Just a typo, 50.
Thanks for the feedback, I am new to the 250r and I appreciate your advice. From what I have read on the net, everyone is running in the 60ish on the pilot and 170ish on the main.

[ONLY2STROKES]

i had a leaky flywheel side crank seal that caused erratic jetting issues on my LT250r.