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Discussion Starter · #1 ·
ok so my mom dosnt want me getting a new cam, she dosnt want me realy doing anything to then motor other than jetting, which is required when i get my exaust, but i can get a aftermarket cdi. so i have 3 questions. What is te best cdi for a 07' 300ex that is 80-90$, and what should my jets be since i have a uni air filter and getting the fmf powercore 4 full system, and im not removeing the lid on my airbox, i will drill like 4 1'' holes though. and what other mods can i do?
 

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could change your front sprocket up one tooth for topend speed or down one for torque.usually only need to up the main jet one or two sizes with exhaust.smaller tires help out torque or taller for topend.i know some rev boxes dont have a reverse rev limiter to.with the sprocket you will notice the difference and theyre under $20.
 

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Discussion Starter · #4 ·
looks good, any certain site that sell sprocket sets?
 

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ebay or local dealer should have them.
 

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I read somewhere that most CDI's, regardless of the name printed on them, were made by the same company(Dynatek). I don't know how true this is and I can't remember where I read it, but I know I read it somewhere. Just thought I would mention that.
 

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Discussion Starter · #7 ·
ya i heard that from red earlier i think?
 

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Yes, that was info given by me.
 

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Basically, any CDI box that looks like the revbox, just different label is a dynatek.
 

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Any 300ex cdi that increases your timing curve and rev limit will help.You can also get a higher sparking coil.And you may want to drill more like 6 1 inch holes in the box lid and you'll need a 40 pilot jet and probably a 128-130 main.
 

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Discussion Starter · #11 ·
ok thx, ya i seen the coils too
 

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Cut the lid in half, this is mine.(yeah my filter is a little dirty, haven't cleaned it since my crash)
 

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Discussion Starter · #13 ·
now thats a new option
 

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I just cut the inner piece, here is a pic of just the lid...
 

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Discussion Starter · #15 ·
now how hard is it if you need to cover in a bit? like if i go rideing on a rainy/really muddy day, id cove a hole or 2
 

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just make sure water cant get to the intake tube you should be good.
 

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Nothing that duct tape across the top can't take care of. On muddy/wet days I cover most of it with duct tape.
 

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Yeah or just buy yourself an extra air box lid for wet and muddy conditions.
 

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Yeah there really cheap for the 300ex's on ebay.
 

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Discussion Starter · #20 ·
alright sounds like a idea, now is there anything else outside of the engine i can to to make it run better other than tires, cdi, coil, lid, exaust, intake? that wolnt kill a bank account?
 
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