what domes

[luker]

what domes should i be running on 61x cylinder @ stock 81mm that is ported 98octane pump fuel, programmable ignition, and the usual bolt ons etc
thanks

 

[Crab]

Most run 35cc with 91/92 octane, but not sure how your octane rating is compared to US fuel.

 

[jetsport484]

with a ported cylinder I was told to run 33's

 

[luker]

its only ported cylinder @ 81 mm and only mild port job???
33s or 35s???
and from what ive been led to believe our 98 octane fuel is eqivelant to the 92 there in the states

 

[Freakrider]

http://www.adaracing.com/personal-watercraft/dome-yamaha-701/ya21

site shows 100 octane for 33 cc domes with 200 psi compression...some peeps test the limits with no wide open throttle runs and report they have been ok...I would run 35's to be safe...

 

[tshank123]

I have a ported stock bore 61x cylinder on my sj and run the ADA 37s.

 

[cambo au]

33s

 

[JetManiac]

35's with stock cylinder

33's with most ported cylinders

 

[needaride701]

Don't mean to hijack. But what if you have no porting and are at 82mm bore?