82.5 riva ported or 84.5 stock porting cyliders

[iptamenos]

which cyliders will choose

the 701 cc bore to 82.5 and ported from riva

or

stock 760 cc cyliders bore to 84.5 with no porting ...

 

[Matt_E]

No. 1

 

[Talsivar]

No. 1

that would be my choice too.

 

[750SX]

The riva jug

 

[2lick]

1

 

[iptamenos]

which is the maximum bore that the riva cylinders can handle????

 

[Matt_E]

84mm, most likely

 

[#ZERO]

Yep.... 84mm on the 61X 701 and 85mm on the 760 cylinder.

 

[iptamenos]

thanks

 

[brentR]

what do u have to bore a 61x to to match oem 760 pistons?

 

[Matt_E]

Take pistons and cylinder to a machinist and tell them to bore it to desired tolerance.

 

[brentR]

thats what i figured, just lookin for the rough bore size.. whats acceptable p2w ?

 

[Matt_E]

Check with a pro, but I seem to remember 4-4.5 thou with OEM pistons.

 

[brentR]

.004 sounds about right

 

[iptamenos]

could anyone tell me how many hp my engine is


Riva Cylinders 82.5 ported for racing
factory b pipe chamber
ada head 32cc
v force 3 reeds
single intake 44 ' carb mod blackjack
plugs ,enhancer
12/17 solas

thanks