yx 4 valve heads?

[storminnorman07]

they are ampco seats and guides which are a copper base

 

[pbk]

hmm i wanna see a 4 valve head with roller rockers.... that would scream like a b*tch

 

[coolmodee01]

harrops eng over here have flowed a cleaned up 4v head at 22hp capabiilty

you wont get any more than that out of it

 

[sean01]

have they flowed a V2 and a stock yx head yet for max hp?

 

[FEAR]

4 valve heads and cylinders aren't to exy 172cc Big Bore, 4 Valve head for YX160 - Moto-Scoot - Store

 

[sean01]

add postage to tht and youd think other wise.

postage from the states is nearly twice as dear as postage from china...

but as a base price it isnt too bad

 

[pbk]

4 valve heads and cylinders aren't to exy 172cc Big Bore, 4 Valve head for YX160 - Moto-Scoot - Store

yer shame there in the states

 

[C70-TURBO]

Just surfing through old thread. What ever happend to the ending of this one? Did the dyno run ever happen?