yz250 carb on blaster engine.. better or no

[cwbinkc]

I am not sure what has been done internally. I do know it has a fmf pipe and i am pretty sure its not a stock bore. There are adapters to mount the reed cage and boot for the carb. Do i gain any power if so top or bottom end and if so do i lose any, anywhere? If i remember correctly it has a 280 main yet. Thanks in advanced new forum member, chris

 

[speedyslyder]

welcome to the forum
got any pics of intake/carb setup?
i think pretty much everyone will agree that the stock carb will work the best.
unless you got a heavily ported cylinder and head mod.
if you do fit it,it will be a challenge to jet it properly,and probably be terrible on the low end.
there is probably another thread on this somewhere,try to look and i will see if i can find it to
other members will post/probably some who have actually tried it,i have not.
sounds like a reed spacer,on your quad you are refering to.

 

[cwbinkc]

i bought it with a broken throttle cable and put my stock setup and it ran like dog. than i put the bigget jet in it and it ran fine. ill get pics when i get it back from my buddy which is making me a custom cable 4 $20. he works for kawaski. and yes it is a name brand spacer will you be able to tell by a picture if any portting has been done? i also could not find a forum on it. which led me to finnally make a account

 

[blasterkid1998]

i believe a yz250 carb is a 38mm maybe bigger? but the stock 26mm would be best with that fmf.

 

[speedyslyder]

people on here can tell you anything lol
read up and people will post advice.
without all of the mods know i cant tell you what size main jet unless you plug chop:
what year is your blaster?
yz250 probably a flat side carb as well.
if it is not running right,i would wait on the yz carb,till we all investigate further lol
leak test
compression test
carb tuned,floats main.ect

stock head

modded head

 

[cwbinkc]

Like I said I bought it with the carb on it. I know nothing about the bike other than what I can see

 

[cwbinkc]

And it has a 280 main jet

 

[cwbinkc]

It's a 01 blaster and a circle slide in the carb I'll post pics Friday when I pick it up

 

[speedyslyder]

ok
well here is the stock carb if you need a diagram,you need every part in there
and here is the link to the manual
http://www.blasterforum.com/threads/downloadable-yamaha-blaster-manual.17325/

 

[cwbinkc]

My stock carb the cap on the slide is stripped out and falls off

 

[speedyslyder]

thats not good lol
person before you put a 280 main in cuz they put the fmf pipe on there,at least they tried
there is tons of peeps on here that will help you with parts and advice.....they must be sleeping

 

[cwbinkc]

I put the jet in my carb and it ran better not perfect but better

 

[speedyslyder]

good idea
if the top cap is stripped then it is going to be a jetting nighmare,as it will be an airleak.
is the oil injection on there or is it premixed?
have you looked in the carb section on here at all?

 

[jus_me]

Measure the outlet side of carb and report back. This way we actually know what size carb it is. as far as a 38mm carb on a Blaster you will lose power going to such a large carb. Stick with a stock 26mm carb for a stock-slightly moded blaster. Once you get into porting, head mods bigger intake etc then you may want to consider something larger but a 38mm is a big carb for a blaster, 38 mm is more in the lines of a 240+ drag bike..

 

[cwbinkc]

It's premixed and when it popped off it did rev up due to it taking in air.

 

[cwbinkc]

I'm hoping someone already did the jetting but we'll see this Friday

 

[speedyslyder]

friday it is
if the top of carb came loose,then it reved up cuz the needle was lifting soo basically pinning itself
make sure you got the locking tap on carb to if you keep it or get a diff stock carb.
not sure if you are getting an aftermarket cap to remove the tors brick or not.
but the stock tors brick carbs come loose every know and again from vibration and huge cap,some have blown motors cuz of it.
if person before you ran it with a stock main fitted with fmf pipe,loose top carb,chances are the top end is not in the greatest shape?you can take pipe off and peak up exhaust port to see if is scored or ruffed up ,unless you want to take the whole thing apart
there is only 2 jets and the needle clip postion
air screw setting/idle setting

 

[cwbinkc]

I bought it with the yz250 carb in it running

 

[speedyslyder]

do you have both stock and yz250 carb im confused

 

[cwbinkc]

Yes I have 2 blasters I bought the new one with the yz250 carb. ...the stock carb was on the other blaster