Ok that does it I need some advice on jetting my raptor. I'm at 2800ft I have a dynojet stage 2 jet kit with 146L and 148R 27.5 pilots and the needles are 2nd from the top. My raptor also has a Curtis Sparks X-6, K&N w/open air box. My problem is that my friends banshee is beating me[img]i/expressions/face-icon-small-mad.gif[/img] When my bike was stock I could smoke him every time and now I just can't seem to catch him. His banshee has toomey pipes, K&N, jet kit. Could someone please help me I need to smoke him tonight. I'v tried the following gearing also, 13/42, 12/40, 12/42, any idea which of these will put me closer again. Thank you for your imput.[img]i/expressions/face-icon-small-happy.gif[/img]

 

your only running 146/148!?!?!? My bike was running 170/175 exhaust/k&n proflow. Does it seem like its running lean??

Mine had a 10.75:1 comp piston, good exhaust, proflow, really good paddles, and race gas. And i could beat my freinds banshee with FMF SST's, K&N, boost bottle (even though they are pointless), like 310 jets, and hualers.

The piston was giving me another 3 or so hp. It was a knowticable difference.

Good luck trying to beat him though. I love beating banshee's.

 

Going by the chart that came with the jet kit it states 146/148 for 3000ft and below. I don't know if its right but thats what is says.

 

First off jetting...your mains look fine but your pilot is way to big I recommend going back to stock with 3 turns out and your needle is to lean I think, try takin it to the thrid from top. I like my 13/42 gearing alot, just get a good holeshot starting in 2nd gear and stomp em good!

 

Sparks said with the K&N I would need to run 27.5 pilots. As for gearing 13/42 is what I'm running right now but I don't have enough power to 2nd gear start.[img]i/expressions/face-icon-small-sad.gif[/img]

 

oh...well...12/43 is really good too and you'll prolly get a good 2nd gear start too. I used to run that gearing before all my engine mods and loved it! Use that jetting I recommended too and let me know how it runs.

 

Thank you I'll go start that right now! Must be done for friday night drags[img]i/expressions/face-icon-small-happy.gif[/img] I'll keep you posted.

 

Oh and about Sparks and the pilot jet...they are way off, 27.5 is even WAYY to rich for my engine. Use stock size forsure.

 

I have just about the same setup.I emailed Dynojet to get jet specs and this is what they gave me:

If you wanted to run with the air box lid off you need to set up the carb with a DJ165/DJ170 main jets, needles on the # 3 groove, go ahead and just adjust the mixture screws until you retain a good idle (usually about 3 turns). But, you also need to lean out your float level 2mm's. Follow these guidelines and the bike will run properly with the air box lid removed.
Regards,


Ross Hunsaker
Technical Support
ross@dynojet.com 1-800-992-4993
www.dynojet.com
DYNOJET RESEARCH, INC.


I went ahead and ordered the jets yesterday($2.00 each)

Hope it helps.

 

I will try that, My local shop told me to try 25's but I Think I'll go with your advice and see what happens. I'll go back to 12/42 and pray for the best.