cbr300cc

[saikamaldoss]

Originally Posted by gtitwo

if you are here, i can do it for you.
we do have custom camshaft long duration and custom head with bigger valve.
but for regular customer, we only move(dial) timing valve.

we are not using 44mm THB yet. usually we do reamering inside THB diameter and change the butterfly.

what is the compression ratio that you have on this bore ? you have a cast piston and if you use 305 on stock head the compression will be 12.8:1 which will be too much and piston will brake. whats the compression on this setup ?

[gtitwo]

Originally Posted by saikamaldoss

what is the compression ratio that you have on this bore ? you have a cast piston and if you use 305 on stock head the compression will be 12.8:1 which will be too much and piston will brake. whats the compression on this setup ?

we do not have actuall compresion on the engine yet, we install it straight away what is kawahara give to us. there is extra thick gasket comes with the package which will lower the compression.

our goal here is to check the durability of the bore up kit.
i will give you an update of the compression ratio once we have done with durability check with extra thick gasket.

you are right, 12.8:1 is way to much for casting piston.
i'm sure it will not reach more than 12:1
we have been testing about aweek now with Indonesian temperature is constant around 29-33celcius and humid weather. approximately, we have put more then 500km to the bike and the bike is ok and in normal condition. no need bigger radiator.

thanks

[atakacs]

Originally Posted by gtitwo

we do not have actuall compresion on the engine yet, we install it straight away what is kawahara give to us. there is extra thick gasket comes with the package which will lower the compression.

our goal here is to check the durability of the bore up kit.
i will give you an update of the compression ratio once we have done with durability check with extra thick gasket.

you are right, 12.8:1 is way to much for casting piston.
i'm sure it will not reach more than 12:1
we have been testing about aweek now with Indonesian temperature is constant around 29-33celcius and humid weather. approximately, we have put more then 500km to the bike and the bike is ok and in normal condition. no need bigger radiator.

thanks

If they need more testers, they can send me a kit and I will test it in American weather. I put about 500 Km on it every week, mostly highway around 130 km/hr.

[loserlazer]

i can test in Thailand too for free hahahh

[loserlazer]

how are teh endurance and durability test are going gtitwo?
any news?

[Turtlebone]

Originally Posted by gtitwo

we have been testing about aweek now with Indonesian temperature is constant around 29-33celcius and humid weather. approximately, we have put more then 500km to the bike and the bike is ok and in normal condition. no need bigger radiator.

thanks

Please keep this thread updated as we are all interested in hearing the results of your tests. If this weren't my daily commuter, I'd already be doing this to my bike

[bongiorgio]

please keep us updated m8
many of us crave for this kit...

[Aufitt]

What class are you folk planning to race this in?

[bongiorgio]

it will be street class for me - just for fun. i can´t wait to see what that does to the bike. the kit and maybe some porting while the head is off :-)
cheers

old school as i am i still get the biggest b from WOMEN....

[gtitwo]

How to dial camshaft CBR250 2011 - YouTube

How to dial camshaft CBR250 2011 - YouTube

how we degree ing camshaft duration while the engine still attach.