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03 XR100 with FMF Powercore 4 - jetting on 4Strokes.com Forums

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 03 XR100 with FMF Powercore 4 - jetting
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ckassen
03 XR100R

ckassen has no Avatar

USA
55 Posts

Topic started on 08/13/2004 at 8:45:20 PM  Member Profile  Reply with Quote
I am going to get an FMF powercore 4, but i keep hearing about jetting. How do i jet something?

Honda Maniac
San Bernardino, CA

Honda Maniac has no Avatar

USA
393 Posts

Posted on 08/14/2004 at 08:20:25 AM  Member Profile  Reply with Quote
If the powercore 4 is all your going to do to it, you could get away with just adjusting the fuel screw. If you were going to add something else like a filter, then you would probably have to get a bigger main jet and/or move the clip.

1980 XL250S
1983 XL100S
2004 piece of junk 125 replica

ckassen
03 XR100R

ckassen has no Avatar

USA
55 Posts

Posted on 08/14/2004 at 11:48:03 AM  Member Profile  Reply with Quote
how much does a main jet cost?

Honda Maniac
San Bernardino, CA

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USA
393 Posts

Posted on 08/14/2004 at 2:49:45 PM  Member Profile  Reply with Quote
A main jet from Two Brother is like $4.32 for the less expensive one. the other one is eight something.

1980 XL250S
1983 XL100S
2004 piece of junk 125 replica

ckassen
03 XR100R

ckassen has no Avatar

USA
55 Posts

Posted on 08/14/2004 at 4:23:59 PM  Member Profile  Reply with Quote
oh ok...lets say i get a uni filter and a powercore 4, which main jet would i need?

honda150
Stockton, CA

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USA
92 Posts

Posted on 08/19/2004 at 5:36:34 PM  Member Profile  Reply with Quote
prolly a 100 or 102

2003 XR100R - 115cc bore kit, renthal bars, fmf exhaust, uni air filter, and bbr fork springs w/ works performance shock.
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