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Sat Jun 08, 2024 10:46 am

What would be a good option be for rocker ratio?
I've been restoring a sand rail and I'm down to the engine. The engine is a 1915cc C.B. Performance
Outlaw dual port heads cut for 50cc
94mm bore
69.5 crank
Currently stock 1.1 rockers and shaft
Aluminum push rods
AA pistons and connecting rods
Every thing except rockers and push rods have been balanced lightened and blue printed. 28mm full flow oil system and oil galleys machined .
Running dual 40idfs
I'm upgrading the rocker assembly soon and would love some experienced
advice on this subject . Thank you
Attached a image of the cam card.

Sat Jun 08, 2024 3:21 pm

WaterBuggy_24 wrote: What would be a good option be for rocker ratio?
I've been restoring a sand rail and I'm down to the engine. The engine is a 1915cc C.B. Performance
Outlaw dual port heads cut for 50cc
94mm bore
69.5 crank
Currently stock 1.1 rockers and shaft
Aluminum push rods
AA pistons and connecting rods
Every thing except rockers and push rods have been balanced lightened and blue printed. 28mm full flow oil system and oil galleys machined .
Running dual 40idfs
I'm upgrading the rocker assembly soon and would love some experienced
advice on this subject . Thank you

I dont think that "Outlaw" heads is not a CB thing Thats SoCal´s chinese early 044 copy Anyway, it can be an ok entrance level head.
2. If you are running std Spanish, or even Chinese copy Webers There is not really any reason to increase valve lift as the carbs will not support more power anyway. They need different venturi´s. Also, I doubt those heads will support much extras flow with more lift. BUT, I could be wrong on that since I have never seen those heads with my fingers. Maybe someone else can inform us about what they will do.
IF the heads will support significantly better flow with morte lift, and IF the carbsd get detailed for the power window, and ASSUMING that it is a tidy build, a set of 1,25´s can wake the upper end up significantly