but if change to original cam..my bike just get 135 on 4th gear...but with this cam 140 on 3rd gear...so do u think is there any others solution to fix this problem?? maybe spoket or anything else?

Since our last TT, as some of you remember I serviced fork last month at BeeHock's. Since then I've been noticing my engine 'choking' at top end... meaning at high RPM, the bike will 'cough' and I can't catch up to C&G already... I've been putting off servicing the carb until just now.

Realized that my air filter is covered with dust and dried petrol making it very dirty... So I took it off, dip it in laundry sabun and dried it. I've also replaced the 3 point Racing Boy spark plug to the original NGK plug.

Took it for a spin, and noticed a huge difference. The engine is so much lighter now, and of course I get better top speed.

Charge, the last time we sprint, what's my top speed agak? Gimme actual value, not the LC value please...

---

Added on June 20, 2010, 3:10 amyou got tukar racing valve spring also? loss compression kut?

---

Added on June 20, 2010, 3:13 amKOSO meter only up to 135kph? cannot be mah... or is the scale adjustable?

---

Added on June 20, 2010, 3:15 ammod to 2-in 1-out engine head?
supercharged LC?

This post has been edited by alexei: Jun 20 2010, 03:15 AM

This is the sacrifice you gotta make - either low end torque or high end power. My first cam behaved this way too, then I switched back to stock cam and do some custom port and polish. Now I am using a Thailand made 250 degree cam, and it has good mid-low to high rpm power. Of course there are many more things, such as pairing with a 28mm carb with correct jetting (very important) and the correct CDI firing angle setting. Each bike will have different settings, you may need to try all the combinations particularly for your 57mm.

are you still using stock carburetor?
I'd suggest you 24mm UMA racing carb, then use racing gear set (as their gearing is closer so tat u wont miss the powerband).


from my LC meter your agak speed is 150kph. Actual maybe is 120kph on KOSO.
KOSO is scale adjustable, I need to set 98% to get exact GPS speed, but now I am running at 100%. Original LC meter is about 123%
and supercharged is a no-no for bike, NA ady make gasket bocor many times

and congrats, u hv solved ur engine problem, let's see how it goes!

This post has been edited by charge-n-go: Jun 20 2010, 08:49 AM

Ok, thanks man. It was a dumb problem to begin with. Now that I've washed bits of the paper filter off, what's left is the metal netting that would probably just filter off larger particles.

Next time we TT, need your time a bit to pace with me to get the better idea of my actual speed.

Btw, your gasket bocor, is it at the same place everytime? I remember it leaked couple of times liao.

sure, anytime.
yes, exactly the same place. First we thought is too lean carb setting caused overheating, second time we thought is gasket material, third time very confirm is the head problem. So the engine block and head itself went through a process to prevent water going into combustion chamber again. 3 more weeks to wait

hmm, what about switching to oil cool? no water to worry about, but then many things need to consider liao. haha...

since you use a bigger block, would you have to trim the gasket when installing, or is it already to spec? Got use good gasket sealant like Loctite or not? Or maybe consider actually measuring your compression ratio?

Everything is done perfectly. The water is not leaking outside the block, but instead goes into the combustion chamber. This is because the cylinder head deform at particular place after continuous long travel distance.

the measured static compression ratio is about 12.x:1

i also have this problem..the EO seems leaking between the block and head..i've already changed the gasket but the problem still persist..what happen??

yea.. now i've set to 98%.. which is quite accurate to GPS speed already.. mayb -0.5kmh speed difference only to GPS.. but its accurate already....

mayb my next mod would be sparkplug + stromberg.. would like to see how it performs.. hope its better than stock can liao..

hehe

what is your engine block & piston?



let me ask if the firestorm is ready.

i'm using shark 62mm big bore kit (block +piston)

haii all LYN's LCi-ans..

my bike is going to reach 1000km in two days time..

so..
i want to ask from u all recommendations on the best engine oil for my first service..
semi or full synthentic??

besides the oil filter tht i need to change during the first service,what else do i need to replace??

Full-syn ^^ beside EO and OF i guess there is nothing else d, ask the foreman tighten ur chain if possible...

This post has been edited by bizzy123: Jun 20 2010, 08:45 PM

ouhh..
haha..
thq2..

recommended brand for EO??
OEM oil filter ka??

Alright! Thx..but at least 3 digits for firestorm right. Hah

Use back ORI OF, EO dun noe depends la Ayam Brand will do XD

need until full syn meh..? i use semi-syn also can liao.. dont feel much difference...

U dont feel it, but when buka ur engine u noe the difference d

ur engine buka before d meh..?


btw.. my motor ar.. i just ask my dad about the price.. hah

he said bike is 6400.. but with insurance is around 6700... and the 3 months installment he made..

makes the bike cost around rm7000 in total..

This post has been edited by Aaron135LC: Jun 20 2010, 10:55 PM

Mine 7004 lol.. xD