Jetting for a worked motor

[Jns400ex]

Hey guys i need some opinions. Heres the specs of what will be done. Lrd full exhaust, k&n open filter no air box, 11.1 wiseco piston .020 over, stage 2 hot cam, 1mm over kibblewhite black diamond valves, stage 2 porting from advanced machining inc. Thanks guys

[CJM]

Try 155-162 and a 42 pilot.

[440rdr1]

Originally posted by Jns400ex
Hey guys i need some opinions. Heres the specs of what will be done. Lrd full exhaust, k&n open filter no air box, 11.1 wiseco piston .020 over, stage 2 hot cam, 1mm over kibblewhite black diamond valves, stage 2 porting from advanced machining inc. Thanks guys


Listen to CJM...he just jetted mine over the weekend, went from backfiring and popping to wheelie'n when hitting second gear....(on a stock motor but lets not go there) haha

[Jns400ex]

155 is stock and its running horribly lean on the stock motor

[Pipeless416]

Originally posted by Jns400ex
155 is stock and its running horribly lean on the stock motor

148 is stock.

[Jns400ex]

1800 feet. 70 degrees. Any help??

[dxcody]

Just Fair warning, you better watch those KW valves, had a intake and exhaust valve snap on me last fall.

[Jns400ex]

Any more advice, 155 main was running lean on stock motor with exhaust and filter. Any help appreciated

[JOHNDOE83]

your gonna need much larger jets especially because you have the kibble valves.

I would buy jets from www.jetsrus.com from 170-220 in incriments of 5.

start with 220 and see if you have any topend, back it down till you rev out fully, then youll be jetted proper for your main jet.

other then that Id buy a 42 pilot jet.

what ever jets you dont use you will need at some point in the future.

Also the open filter design adds more air which needs the larger main jets.

[Pipeless416]

i really feel like starting out at 220 (or anywhere near that for that matter) would just be wasting money in jets.

[Mr-Sleeper-34]

Originally posted by JOHNDOE83
your gonna need much larger jets especially because you have the kibble valves.

I would buy jets from www.jetsrus.com from 170-220 in incriments of 5.

start with 220 and see if you have any topend, back it down till you rev out fully, then youll be jetted proper for your main jet.

other then that Id buy a 42 pilot jet.

what ever jets you dont use you will need at some point in the future.

Also the open filter design adds more air which needs the larger main jets.

- Thanks for the link.