will a 25R air box fit a 2000 yamaha blaster carb? if so what modifications must i do to make it work ad whatnot

 

It will fit but i'm pretty sure it doesn't work if you have a stock carb..Most the time when someone does it is becuase they are also using the 250r 34pj carb..

 

whats a wild a$$ guess at how much this carb will cost? will it fit the frint stock airboot? i have a totally stock motor but more air flow and stuff wont hurt anything will it?

 

If it is a stock motor the 34mm pj 250r carb is a little to big..It would have good top-end but would really be slugish on low end..What i did was i got a 30mm pwk..It is a nice upgrade from stock and it fit's the stock intake manifold and air box with a little convincing.. if you get the motor ported eventually you won't have to worry about a carb being super small..stock is a 26mm incase your didn't know that..If i was you on the stock bike i would get these 4 thing's first...

a good pipe(will be the best gain of power other than porting
30mm carb
oil injection block off
and some reeds

 

With a dremel you can modify the stock intake to accept up to a 33mm carb, but it takes come convincing to get in. A 34mm will be too big on a stock engine, and as letha stated you will have good top end but will lack on the bottom.

 

just my 2 cents here, but removing the oil injection is the first thing you want to do, way back when i had a blaster it was the first thing to and the little gear was allready starting to chip

 

i totally agree but the father says that it is totally a waste to get the oil block off kit he says its a pain in the rear end so im looking for a dirt bike that way i can just use the same mix and fuel and whatnot