con rod use standard? target how much rpm?gt128 9k rpm already kaput   

http://www.gearingcommander.com/

try play around with this be4 u main tukar tukar ..... belakang 40T pickup only .. when reach top .. gegar liao .....

std modi means? normal modi big bore+ carb 22mm+ open exhaust chamber + highcam+ CDI?
i heard block brand which is last longer in term of quality,  SBK brand but the price is pricey. forge piston kit alone cost almost 200+ 

For modified engines, e.g 57mm piston + block (fz 150cc block + piston), is the cooling principles the same?

This is my main concern. If I cannot start bike, means cannot go school, means I'm a dead student when my mum finds out 

Bro, try add oil cooler like picture....this is mine...maybe it can solve temperature issue. Mine 245cc. Same block like yours. Using it daily for work.

This is modded. Now you can find plug and play oil cooler.

This oil cooler too long to put infront of radiator like nowdays aftermarket oil cooler...aftermarket oil cooler shorter and can be put infront of radiator...plug n play...
Put infront off radiator maybe increase radiator heat, that's why I put inside carb area..also at the back of oil cooler I put 1 more 135LC fan...control it semi-auto...I can turn it on or off by switch....if off, 2 fan radiator still turn on if temperature exceed maximum temp...
My friend use the aftermarket oil cooler that install infront off radiator since the shop install it...than I relocate to carb area and put 135LC fan..

Effective...I been using it almost 3 years from 196cc to 245cc..just upgrade to 245cc last year...

67mm with 5mm jackrod...
I also use lhk piston...i think cardinals oil cooler is good...

Electric pump? waterpump no need to change...been thinking about changing waterpump before this...but I read in some article...for drag it's good if use electric pump rather than mechanical pump the benefits is engine load can be lessen and flow is static fast...

If using daily just use the mechanical pump and improve engine cooling such as adding oil cooler, use bigger radiator like X1R radiator, use good coolant and use better engine oil.......I have been using oil cooler, good coolant and engine oil....so far no problem yet...my 2 fan always on...

75mm is big...compression is super... ...you can put decompression pin at cam for easy start...if your cam has decompression pin hole....there is no significant increase when remove the decompression pin...

yes and sometimes ride to Jempol in this setup....my friend spec 66mm with 6mm jackrod ride to Perlis....

UMA Superhead?

If u can dyno the shocks, do it. The damping chart is a must to perform any modeling or analysis, IINM. My interest is the results, to buy or not to buy RB for my next shocks.

Yes, bike parts can be expensive too. And you haven't try mountain bike parts.

Found some photos on SAE Malaysia FB page, and noticed karts using direct and bell cranks+pushrod.

Good day & salam... Newbie here

Looking for some advice for Y15ZR maintenance,
Buying 2nd hand std no modi (sorry Honda RS150R)
Mileage ~2000km
Previous owner done first service @ 1000km with liqui moly EO....
Is it useable? Should I change to motul 5100 asap? Since i didn't see anyone mention liqui moly here + other forums suggested liqui moly 10-40, which I assume would be the one used by the previous owner. Furthermore I read in here must use 10-50 or above.

Thanks in advance...

need overhaul engine...not worth..