Where can i get high compression dome orings

[Heavy hitter]

I have blown two dome orings on the same cylinder in three weeks i know a guy that said the high compression orings are hard to find

The bike runs bad ass as soon as i go through the trap and let off the gas it lets loose left cylinder compression oring

Every time i think one carb is running out of fuel before the other and going lean one plug is brown and the other is

A grayish almost white color on the side that took the shit. should i install a fuel pump its 1/8 mile the bike is on

Keihn35's with big bowls on alky any info would help

[locogato11283]

you need to explain your setup more. what head? whats your compression? my bike last checked out at 200psi and i dont use any special o-rings. just standard o-rings from NOSS.

[blowit]

I have blown two dome orings on the same cylinder in three weeks i know a guy that said the high compression orings are hard to find

The bike runs bad ass as soon as i go through the trap and let off the gas it lets loose left cylinder compression oring

Every time i think one carb is running out of fuel before the other and going lean one plug is brown and the other is

A grayish almost white color on the side that took the shit. should i install a fuel pump its 1/8 mile the bike is on

Keihn35's with big bowls on alky any info would help

 

 

That oring letting go is likely giving you fair warning about an engine problem. Likely that is it toasting on the exhaust side of the dome. If you are running out of fuel, you should address that issue and it should fix the problem. Standard Orings will typically hold an alky 16:1 motor. I would recommend studying fuel flow restrictions first. I have been able to run some pretty hot motors without a pump but reducing restriction.

 

B

[lowriderb]

another thing you could look at as well would be the groove the oring sits in may have been damaged. it all depends on your motor setup.

 

also how much compression (with a good oring) does your motor run?

[JMADD]

Assuming those are fresh plugs, it sounds like the cylinder that DIDN'T take a shit was lean. You probably have other issues.

[kawiking]

hows ur plugs look ? maybe the orings arent sealing or getting pinched. i use vaseline on my o-rings when i install them . look for any dents in the domes or head. are u torqueing the head to spec ?

[Heavy hitter]

The bike has a vitos hemi head 18 cc domes on stock cylinders ported pretty agressive 4mill v force reeds boss one piece intake 35mm keihns sittin on big boss bowls alky

The main jet is a 113 not shure on the pilot we bumped it up to a 116 main and put a set of 19 cc domes in not exactly shure on what the mechanic cut them to

dropped the compression down to about 185 it was 200

So as soon as the rain lets up im goin to the track and see what shee will do

[shanYE west]

I've made complete 300' passes with the fuel off while using them boss billet bowls..

 

Definitely got some other issues going on.

[badassbanshee479]

check the head and the top of the cylinders and make sure they are true and flat... had this problem on my 4 mill and ended up being to tight of squish and the top of the cylinder was not completely flat

 

do you know what the dump tube is drilled to in the carbs? cause if its not drilled bigger than the main jets you have in it putting bigger mains in it will not add anymore fuel.... also are you running power jets?

 

I have had no problems running my 4 mill cub 660ft with no pump.... just 39mm pwks and billet bowls....