120 Main on Stock Carb...WTF?!?

[diesel]

My neighbor's Blaster has a 120 Main Jet that appears to have been drilled out. I compared the size of the orifice of the 120 Mikuni Main to the size of a 185 Keihin Main...the Mikuni Main is noticeably larger suggesting that it's been modified (drilled out). What Main Jet came in these from the factory?

 

[BlueDragon1998]

Never thought of drilling one ...lol Wheres my cordless at...lol

 

[1997blaster]

theres a thread on here about how to do it

 

[diesel]

I tried to search for an answer before I posted, but searching "stock jetting" returns way too many results. Doesn't the Blaster stock carb have a Main Jet in the mid-200's?

 

[245stroker]

yeah, stock is like 230

 

[stephen12091985]

^^^ stock is 230

 

[blasterman312]

Years 1988-1989 220 Main
1990-ON---------230 Main

 

[yfz450bence]

1 size change makes a big differenct, drilling it out is the worst thing someone can do.