Calling The Graydon intake guys

[Snopczynski]

Do your jetting runs after the bike is warm, and ride it for like 30 seconds first. Main jet should not effect low end performance at all. Thats all pilot jet, airscrew, and needle.

[endofitall9]

yeah I usually let it warm up then putt around for about 10 min then do a wide open test... the main jet is not what I'm worried about that can be dialed in easy..the lowend problems really suck I have a 35 pilot in there and every book I have says thats the lowest pilot for this carb I can get..you can play around in 1st and 2nd second just normal riding take the plugs out and they are soaked.. If i could get that figured out then the rest should be easy to get dialed in.. I've open the airscrew up to 2 turns out and the plug still get soaked... could I get a needle that will lean the bottom out..if so what kind. The top was good until I put holes in the box now it just acts lean as it bogs up top and breaks up.. please help me fix the lowend tho keep the stuff coming snop..thanks

 

Josh

Edited May 15, 2007 by endofitall9

[Snopczynski]

What would you say the overall inlet size into the airbox is now? How big is the air filter? What is the total length from the back of the carb to the beginning of the air filter?

[endofitall9]

the box is 8 inches long by 6 inches wide and 4 inches deep the inlet in the box is a little under 2 inches..

 

the filter is a unifilter 6 inches lone and like 3 inch diameter 2 inch clamp

 

 

If I could find a smaller pilot the jetting would be fixed i believe I've been on here all evening searching I havnt backed the airscrew out past 2 turns..tomorrow I'll back it out a max of 3 if that doesn't fix it then I'll definately need a smaller pilot or make it get more air "a larger diameter tubing and more welding.. any idea as to where I can get some jets?

[Snopczynski]

Something isn't right, I run a 45 pilot jet. Is the airbox inlet to the carb at least the same size as the back of the carb?

[endofitall9]

No it not the same size as the carb its smaller i took the stock boot from the airbox flipped it, put the big end on the carb and stretched the small end over the tubing.. I'm trying to not cut the old tubing out and put in a bigger diametr and buy 2 carb to airbox 34 35mm carb boots when i just need 1.. I guess if I cannot get a smaller pilot jets this is what will happen..unless tomrrow I back the airscrew out like 2.5 or 3.0 and it leans the pilot out.. the fact is its fat down low so either it need smaller pilot "which I don't know where to get" or it needs a bigger tube put in the box (trying to avoid)

[Snopczynski]

aha, I knew it. Thats the problem, your choking the motor out with that small carb inlet. Make it at least the same exact size as the carb or bigger. Bigger would be better.

[endofitall9]

yeah. I'll fiddle with the airscrew tomorrow. otherwise I took measurements I'm going to put tubing in there so I can buy some like moose carb to airbox boots for a 35mm carb and don't have to hunt for rubber that will make the transition. the peice of aluminum I need is 8 inches long 2 1/4''OD x 1/8'' wall x 2''ID thats the same as the inlets on the stock airbox so after I order my pipe which is $25 dollars with shippin I'll cut the old out weld the new in and then I should be all setup nicely..........thanks for the help snop..I'll post back to let you know what happens tomorrow when I adjust the airscrew further out

[endofitall9]

Well I've turned the airscrew out 3 turns and it is almost all cleaned up on the bottom I would say 1/2 turn more would do it but I'm not going too I've always went by rule of thumb if it has to go past 2 turns then you need a smaller pilot..the problem is I cant find a smaller pilot. I guess if I can't then Ill have to modify the box once more. I know after I have gotten the pilot cleaned up that midrange and topend are way lean it pops and crackles after you get in about 3rd so i havn't even tried to take it past 3rd without adjusting the needle and main. Anyone know wher I can get a smaller pilot than a #35.