QUOTE(TryX @ Oct 28 2011, 02:17 AM)
Lastime i also think more bigger valve is better but after the foreman explain to me. Bigger is no use if u play drag. If want put bigger valve must calculate too. Bigger valve will not have much power if the bike cc is low. So mean more bigger valve need higher cc if not the bike will tengelam when shifting gear time.. Bcoz lubang besar but power tak cukup..
the big valve is to match the UMA 62mm, means UMA is trying to say the big valve head from Indon is not good enuf for their block...
big valve is for 60mm and above....
I go this shop sometimes also

, they measure how much oil to pour in for change EO. Always use caliper measure here measure there. Even car mech dun really measure all the time....
All pomen i seen all main agak-agak....
Added on October 28, 2011, 10:48 amQUOTE(TryX @ Oct 28 2011, 03:04 AM)
Cannot one. if u want follow cubprix spec your bike tottaly cannot ride for everyday use. Those cubprix bike not using normal pistons. they using dome pistons. Compression very high. Pick up very good. if u pull your throttle hard on highway. Than u will findout that your engine have so many leaking problem. They set they bike for track use only. The bike also cannot use starter d. If u can tahan tukar pistons, valve and block every month maybe still can think of it.
If really can do like cubprix spec early early many ppl will do alrd no need to using big block d... 4stroke not like 2stroke.. if 2 stroke even a standard pistons porting the block nicely the power alrd increase so much d.. If want do like cubprix spec only can do on 2 stroke bike. Is wasting money to do on 4 stroke bike. Bcoz need to sacrifice alot to get that kinda power.
Cubprix use the dome piston bcos the block kenot get bigger d...
For lagenda, try r ppl using the dome piston on everyday right but for LC how to use compression already very high la....
LC already 10.9
Lagenda 9.3 or slightly higher....
LC put dome piston compression 12 or more already, sure the kenot tahan, gasket and etc, not design for it la....
Added on October 28, 2011, 11:01 amQUOTE(TryX @ Oct 28 2011, 03:28 AM)
Normal pistons wont get 22hp d. If really want modify like cubprix better get a 125Z. No need change big pistons one. Porting, change carburetor, Put chamber pipe. Enough for you to kill TZM liao

Normal UMA piston block set can reach 22 HP with all the other parts...
FYI, CP 130 bikes not more than 20HP....
LC max can get 30HP, never really heard got ppl get it yet.....
New TZM, 35HP IINM.......
This post has been edited by NewGUY: Oct 28 2011, 11:01 AM