CARB QUESTIONS!

[crusty4365]

ok im starting to do work on my blaster
i figured if i am going to mod it i might as well start small and work my way up to a 240 kit

i already have an fmf fatty and silencer
i premix 32:1
airbox lid is gone

i am having my stock cylinder bored over .040 piston size.
so i figured a bigger carb would be better so i ordered a 34 mm PJ KEIHIN carburetor. its a little big i know!
what size jet should i use on this carb for a .040 with my stats up top^ so far. and what should i jet that new carb too with a 240 kit?
please give me all you know of this carb iv never jetted a thing in my life.


oh btw what is better ct 240 kit or vitos 240 kit? are there any other 240 kits that are better?

randelator told me a 34mm carb and a +4mm crank would make a 240 kit worth the price and hassle so i got the carb first.
im gunna get a 240 kit in summer im leaning towards vitos any reasons not to go vitos? and i can have the 240 kit bored out to w e i want because my dads friend knows how. so what do you guys think of this i know its alot but im a newb at modding.. im more so a problem fixer not much of an upgrader.. every responce is appreciated thanks guys!I:I

 

[blaster82]

sorry man but i dont know anything bout jetting a keihn, let alone with all your mods that you will have.

 

[regal81455]

well, where to start...

1. that carb is gonna be too big ( big carb does not = better performance, actually it can be quite the opposite, my 216cc fully ported and polished diamond national motor is only a 30mm pwk ) for your otherwise stock bike, you're gonna have to jet waaaaay down. if it were me i'd put that on a shelf and leave it alone till you get your 240 kit.

2. in regards to the 240 kits, there's vito's, ct, airsal, & firebreather (maybe more but these are the one's im aware of ) if it were me I'd go CT or Airsal 1st - Vito's would be my last choice.

3. if you wanna bore out a brand new 240 cylinder go right ahead BUT you've just decreased the usefulness of that cylinder right out of the box because now you can only bore it so more, WHY WOULD YOU WANNA DO THIS?? your HP gains will not be enough to justify this...

 

[dirtyblaster]

the ct porting style is sick! i like it betetr than any other 240 kit. the firebreather ain't bad either

 

[Oldfart1stATV]

"Hassle"

Is all in the one doing the work. R does this for a living so it's easy. If you have never clearanced a head for a stroker before, it's gonna be more than a hassle. If you are going to get the 4mm stroker DO NOT, DON'T get the Vito's. The hassle get's even worse with that combo. I would suggest bolt on parts. A nice CT set up will work very nice and I would say get the 3mm stroker instaed of the 4.

My 34mm Keihin is suckin' through a 100 main now....Hmmm, scratch that, damned if I remember what I left in it. I will be taking it apart over the next couple weeks and will gat back to you on the keihin set up.

This for sure, don't bother setting it up until you get the 240. Too much carb for much less. You can jet it down, but it doesnn't perform as well as stock Mik jetted up.

A

 

[Stryder917]

-CT is a great 240 kit
-Firebreather 240 kits are very nice as well

i think you're carb size is a little big from by what you only have, if you run that b4 u get the 240 kit, ur gunna have reallllly low jetting

 

[crusty4365]

damn if i were to get a stroker kit idk why 4 would be bad and 3 be better? isnt bigger better?
bigger carb
bigger engine
bigger sprocket
bigger stroke
bigger head
ect..

 

[regal81455]

no...bigger is not always better with carbs...you really only need big carbs when you have big cubes to contend with. even then you might be better off with a smaller one. small carbs tend to be more reponsive than big ones, everyone seems to think big carbs = big hp but it is totally false.

 

[crusty4365]

damnnnn well if i were to get a ct kit should i get the complete kit or the 800$ one? and what site has the best prices?

 

[B14573r]

a +4 stroker needs major work to get it to fit, the 3mm one needs no work

 

[Stryder917]

i wouldn't say "major" work.. just a little bit really, the only thing is you must must must know what your doing or your screwed...

+3 stroker is not better, but it is easier to install than the +4 is

REGAL IS ABSOULTELY CORRECT

 

[fmxr47]

a +4 stroker requires you to start shaving on the bottom end case which makes it thinner, to allow the rod to move w/out making contact w/ anything, from what ive read that is, im going with a 3mm if that makes any difference to ya