slip on pro-circuit pipe - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 02-08-2003, 12:02 PM
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slip on pro-circuit pipe

can anybody tell me on what size i need to put in a [img]images/graemlins/cussing.gif[/img] main jet and needle.on stock air box.i need for the slip on pipe
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post #2 of (permalink) Old 02-08-2003, 12:05 PM
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Re: slip on pro-circuit pipe

YOU DIDNT SAY WITH WHAT PIPE?
[img]images/graemlins/cussing.gif[/img] <font color="blue"> </font color> SORRY ITS A SLIP ON PRO CIRCUIT [img]images/graemlins/AR15firing.gif[/img] <font color="black"> </font color>
post #3 of (permalink) Old 02-09-2003, 12:15 AM
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Re: slip on pro-circuit pipe

I'm afraid that re-jetting is a little more complicated than merely throwing main jet sizes around. Much depends on your elev,. other airflow modifications done or planned, and also just on the particular needs of your own engine. Only your own engine can give you a real answer to the question. It does that after a thorough test ride &amp; plug reading
Also, a different jet needle isn't necessary and normally it is not even necessary to change its position from stock, which normally is the 3rd position.


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post #4 of (permalink) Old 02-09-2003, 07:16 PM
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Re: slip on pro-circuit pipe

You didn't read my post-New T-4 WOW!!!!-so, I tell ya the same thing I said in the post.
I live and ride in southwest Ohio, around 1000' above sea level. Last week, I put a new T-4 on my 2001 400ex. I have a stock airbox, and filter (soon to be either twin air, or UNI filter). I am running a 155 main jet, and a 45 pilot jet. The pilot is too rich, and I am going back to the dealer to get a 42. I tried adjusting the fuel screw, but ended up at ~1 turn out, which means that I'm too rich. the Ideal fuel screw setting is like 2-2.5 turns out. Anyway the bike now flat gets with the program from the midrange on up [img]images/graemlins/burnout.gif[/img], and sounds cooler than hell!!!! [img]images/graemlins/grin.gif[/img] I think I might trade my extra spark arrester(don't ask), for a smaller end cap to gain some low-end. I have no internal engine mods yet, but am planning on a std. bore wiseco piston kit, and an XR400 cam sometime next winter. then a header, and then this and then that and then some more......
(Sounds expensive huh?)
post #5 of (permalink) Old 02-10-2003, 08:38 AM
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Re: slip on pro-circuit pipe

Gotta pay to play [img]images/graemlins/grin.gif[/img]
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