Carbs and crossover/boost bottle

[Heavyd442]

Hello,

 

Need some advice, toasted my crankshaft lower rod bearing last trip out. Changing my setup, and would like some advice.

 

Here is what I had.

4 mill long rod

Stock bore, aggressive port (drag)

35 mm mikuni carbs, billet intakes with boost bottle.

CPI in frames

Cool head, 19 domes

Ran 50%110 race fuel and 50% pump premium.

4 inch extended swingarm.

 

Here is where I am going.

New 4 mil long rod crankshaft

Trued and welded by redline, updated bearings.

Pro mod trans (redline)

421 serval with mild dune port

Driveline performance 22 domes

Driveline clutch

Hinson complete set up.

Pro design billet impeller

 

I want to run pump premium, and just play in the dunes mostly. I drag race once in a while, but nothing serious.

 

Should I switch to 33pwk's instead of 35 's

I have billet intakes now with a boost bottle, should I switch to a Mattoon or other one piece billet intake with the built in crossover ? Do those work ok ? Fuel lines are tight with the boost bottle and cpi's.

 

I just want it to run good, and have some good power, but be dependable. Tired of f'ing with the four strokes.

 

Any input, advice, suggestions ( other than to go F myself) would be appreciated.

 

When the build is done, i will also ask for jetting help.

 

Thanks

D

 

 

Sent from my iPhone using Tapatalk

[wayne_smith97]

Switch to upp intakes and forget about the boost bottle.

[Heavyd442]

Switch to upp intakes and forget about the boost bottle.

Ok,

 

I looked at those I think, they are all rubber, but still take a crossover tube correct ?

 

Thanks

D

[wayne_smith97]

Yes

[ClaudeMachining]

Ditch the cross over tube while you're at it. Buy non cross over intake.

 

Envoyé de mon GT-P5113 en utilisant Tapatalk

[trickedcarbine]

Ditch the boost bottle and get a manifold/s with out a crossover.

 

I think with a serval 22cc domes is cutting it close for premium pump if you're on 91 octane. 93 is probably ok if you're not adding timing.

 

Run 35's if you like to get wide open a lot. If you're in constant tight twisty stuff, you may find that the 33's will feel a touch more responsive but won't charge up top like 35's will.

[Heavyd442]

Ditch the boost bottle and get a manifold/s with out a crossover.

 

I think with a serval 22cc domes is cutting it close for premium pump if you're on 91 octane. 93 is probably ok if you're not adding timing.

 

Run 35's if you like to get wide open a lot. If you're in constant tight twisty stuff, you may find that the 33's will feel a touch more responsive but won't charge up top like 35's will.

Thanks