[TRX700XX]

What is the largest big bore kit out?

 

[smo0oth1]

108mm

 

[nm700xx]

Thumper racing has the 12:1 105mm set up ready to ship. Think it takes it to a 727cc?

 

[DL700]

Spend money on the cylinder head first!!!

 

[TRX700XX]

so webb cam, kw springs and arms, and a port job would be better than a BB kit

 

[DL700]

yes... ported head with oversized valves, Web cam and bored throttle body first, big bore will only increase the low end without the head to support it

 

[smo0oth1]

so webb cam, kw springs and arms, and a port job would be better than a BB kit

Your signature says "polished", What exactly was done to it?

 

[TRX700XX]

My ex-girl friends dad was a major adrl drag racer and he is good friends with the guy that designs sonny's drag engines. i had left my xx over there one weekend and when i went to pick it up he told me he polished the exhaust port and one side of the TB... he did something because it ran totally different after that.... needless to say he wouldnt tell me what he did! so i just put polished head...

 

[DL700]

did he pull the head?

 

[TRX700XX]

yea cause i bought a head gasket and rtv silocone

 

[DL700]

oh cool, sould like he did a a stock valve port to it then

 

[TRX700XX]

explain what you mean by "stock valve port"

 

[DL700]

Stock valve size remained.....port and polish... do u know if he did valve work as well?

 

[TRX700XX]

really aint 100% positive.... i have been wanting to send it off to bo white and let him work his stuff

 

[nm700xx]

HDD what do you recommend on the head/valve work? What is the most power and the most bullet proof set up?

 

[DL700]

i always recommend stock bore first...

we run a +2mm intake and +1mm exhaust on the xx along with porting to match....
Stock valve porting on the xx is a waste of money IMO due to the very small OEM valve size....

 

[Baxter]

i always recommend stock bore first...

we run a +2mm intake and +1mm exhaust on the xx along with porting to match....
Stock valve porting on the xx is a waste of money IMO due to the very small OEM valve size....

What mods would you recommend to make the engine better but stick with stock valves ?
I ask because posting (plus customs charges) a head to and from the US gets expensive and alot of downtine.

 

[DL700]

What mods would you recommend to make the engine better but stick with stock valves ?
I ask because posting (plus customs charges) a head to and from the US gets expensive and alot of downtine.

piston, hc3, +3mm bored tb, clutch upgrade,,, no gonna make a ton of power without going bigger on the head/ valves/cam