yamaha blaster jetting

[merzracer33]

I have a yamaha blaster and im not sure what to jet it to. It has an fmf fatty pipe with a powercore 2 silencer, its bored out 2mm over,34mm carb, and a k&n filter. What should I do?

[honda250r]

what brand of carb does it have a mikunie or a keihn

[merzracer33]

its a keihn

[honda250r]

humm idk what your jetting should be on a keihn carb if it was the stock minkuni it would be around a 290 main probably a little lower but idk about the keihn

[Fugly Blaster]

stock mikuni main jet is 230 on a blaster.i have a stock pipe with boyesen reeds and no airbox cover bored 20 over and i run a 270 main with the needle clip in the middle on my mikuni....probably runs a bit rich but better than lean

[tyephoon]

stock jetting for the 34 is 155 main and 55 pilot

[merzracer33]

thanks i'll try it out

[leasureryan]

Heres what I've got to say. I have a 99'....I just rebuilt the topend, and added a bunch of aftermarkets. After the bore, now 67mm Wiseco piston kit, FMF fatty gold series with powercore 2 silencer, Boysen reeds with 1/2" reed spacer, UNI filter, lid removed from filter box, running stock Mikuni carb, Oil injection blocked off using Klotz BeNoil 32:1 with Klotz octane boost to 98 octane, with 1 size larger Pilot jet to 35. I thought that I would start huge yesterday when I fired it up for the first time, and try a 310 main. I fired it up...and everything was great. Idled fine, sounded good. I took it for a spin did a plug chop, seemed to be a little to grey for my likeings. It was NOT choclate or wet as I thought it would be. This thing is BEGGING for more fuel, so I am bumping the main up to a 340 tonight, and will test it when this GD rain quits!