jetting

[01sheenoby]

need a little help with some jetting please. i have (if you will) stage3 porting. not quite dune. stock carbs with 260 mains and 27.5 pilots. other mods include 20 over, cool head w/21 cc domes, +4 timing, fmf fatty pipes, v-force 3, boost bottle no snorkle on air box and a rev box as well. any help would be greatly appreciated. thank you

 

 

 

[Larry's Shee]

This a new to you ride? Or new set-up? IMO, you're probably lean.

What elevation you at?

[Larry's Shee]

BTW, ditch the baby bottle, does absofuckinglutely nothing but crack the carb boots.

Edited February 28, 2016 by Larry's Shee

[hoppedupandcutdown]

and outside temp? agree sounds lean

[trickedcarbine]

260?! Way lean on a set up like that.

[Shee_fast]

Bet you should be at a,310 or bigger even depending on elevation and temp...and for real ditch the boost bottle there junk

 

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[01sheenoby]

This a new to you ride? Or new set-up? IMO, you're probably lean.

What elevation you at?

machine not new to me. port job is my newest mod for this engine. elevation between 600-700 fasl. ground up rebuild for spring riding. so no (baby bottle)? so use stock cross over? 310 mains i will try. what size pilot

[01sheenoby]

and outside temp? agree sounds lean

by the time this ground up rebuild is done outside temps will be in the 60's. live in upstate ny so no winter riding for me. thx for replying to my post.

[hoppedupandcutdown]

Yes, stock crossover is best. Do you run a lid? best not to for more air with those mods

[01sheenoby]

Yes, stock crossover is best. Do you run a lid? best not to for more air with those mods

yes lid is on but no snorkel and i put 2 one inch holes near back of lid. concerned with dust. abandoned railroad track dust seems to be very abbrasive stuff. any other opinion on what to do for more air? eg. no lid diff filter other than twin air? lots of money in this build. just want to protect my investment.

[Larry's Shee]

So the port job is new addition, and now you need to jet. Since this is a new build, have you leak tested it?

Read up on how to do a plug chop/ read. Start large, work down.

 

"Baby Bottle" is my way of slamming boost bottles. Hell, they don't even need a crossover tube. Obviously you need something to plug the hole.

[01sheenoby]

So the port job is new addition, and now you need to jet. Since this is a new build, have you leak tested it?

Read up on how to do a plug chop/ read. Start large, work down.

 

"Baby Bottle" is my way of slamming boost bottles. Hell, they don't even need a crossover tube. Obviously you need something to plug the hole.

[01sheenoby]

Well this all Started cause of a rod bearing failure. Crank kit is on its way. Entire engine will be new other than cases. New clutch,everything. Want everything on hand when I start my build in the next week

[trickedcarbine]

Do a pro flow mod on the air box. There's a few companies making them. It's a Billit adapter plate that you put a bead of silicone on to seal and a few screws. It accepts a better filter set up with less restriction.There's a few companies that sell them. The Uni/Twin Air filters are available for them as well as a multitude of K&N gauze type filters. The Foam Filters will clean the air better, however they absolutely must be cleaned often or the bike will not perform well.

[01sheenoby]

Do a pro flow mod on the air box. There's a few companies making them. It's a Billit adapter plate that you put a bead of silicone on to seal and a few screws. It accepts a better filter set up with less restriction.There's a few companies that sell them. The Uni/Twin Air filters are available for them as well as a multitude of K&N gauze type filters. The Foam Filters will clean the air better, however they absolutely must be cleaned often or the bike will not perform well.