Good.
Where you do it? My area foundry cannot do this.
Can you share location? Hehehehe
I have 2-3 heads that have this kind of problem.

That's not normal. Tighten your handle make it stiffer a bit.
Ooooo kecik kenit. I know. Thank you.

Very long. How many run did you make before it crack?
Siam head use original head to custom big valve?
I'm using original head because racing or original head material is different. It will cause valve seat drop inside after 3-4 years of usage.
Size only 24-22.  . This is my friend cylinder head picture same like mine.

Hi all, new here but been lurking for quite a bit. Time to change block and piston for my old LC v1 and I figured might as well upgrade to 150cc. Planning to change to FZ block & piston.

This bike used to be my everyday bike but I bought a scooter for everyday use and now using this LC for weekend. I chose FZ nye setup cause convenient. Not going to race it but dapat tapao Y15ZR pun ok la 

1. FZ piston melengkung ke dalam sikit and from what I've read, it's not so good? Is it better if I use other 57mm piston but with straight top or yang melengkung ke atas? (higher compression).

2. Do I use the original conrod from LC or change to FZ conrod as well? The valve and valve spring too, do I  change it as well?

3. Is FZ camshaft good enough? Or do I need high cam?

4. Changing my ratio too. Faito (1ST: 32T, 2ND : 29T, 4TH : 21T) good enough? or yy pang? Or any recommendation?

Thanks for the reply! 62mm block w/ piston, which brand set recommended? I'm on student budget  change block ni pun cause I have to since the moto dah start buat hal sikit, dah start keluar asap and sometimes RPM tak nak turun even after lepas throttle.

recommend me the block and piston set and I try see if it's within my budget. btw it's PNP kan?

I buying the 5 MJ and 5PJ as it comes in a set, apart from MJ 150 and PJ 38, the other 4 can recommend the range?

Thank you!

any recommendation which EO work best for Yamaha LC135?
Right now i'm using motul 3100 which is rm37.10 (include gst) which quite pricey

Left cylinder head is yours?

wahlao ini tembak awan punya spec ni 

Rim y15 boleh x masuk kat lc v1?

hi all, wanna ask ask, actually lcv4 uma 28mm carburettor + uma 62mm block is it a good combination? feels like very heavy. seems like abit hard to get a good setting for my case @@

Bigger carb and race cam is meant to increase power 6000 - 12000rpm. Anything below 6000rpm will have drop in power, so u cannot suddenly go full throttle when launching bike at start, due to vacuum around intake area (race cam character). Stock cam and stock carb can do it as they are designed to have good power from 3000rpm to 7000rpm. So, when you ride the bike, first must understand the mechanics of race cam and bigger carbs. Of course, I am suspecting the carb setting isn't accurate too.

Besides, it is a weird combo: your race cam and big carb is meant for 6000 - 12000rpm power, but the head and pipe doesn't allow it. That's why the carb and CDI setting is tough, not easy to get accurate one.

Speed drop when 4th gear is because the exhaust (head and pipe) backpressure is too much, limiting the airflow. Pipe and head need to lepas more gas at higher rpm, so the engine can breathe in new fresh air.

stock pipe is even worse than UMA pipe. Open pipe need to custom make, I DIY ownself and ask fren to make it. Not expensive, just around RM250+
For my case polis no kacau bcoz when I cruise, the bike is very silent. Only when going all out, then the bike will scream (which sounds very nice).

Im from Penang. I only know Tuneboss fella in PJ, but they are not setting CDI/Carb.

Hello guys.

I'm ijam, from kl.

I really need your help about superhead 22/24 for lc135.

Currently, my Lc still in bengkel, but right now on hold bcuz confuse to choose between 19/22 & 22/24 superhead.

Blok size 66mm
Jekrod 4mm

Can anyone share with me the maintenance?

I live in penang bro.. i ask SC jelutong.. my lc 4s v4.. milage 600km..

This is 2nd time i ask them... 1st 300km oredi got knocking... SC said normal... they want lepas tangan ka.. haihh..

can ka..?