QUOTE(Aaron135LC @ Jun 27 2010, 01:13 PM)
hey.. wanna ask something.. yesterday i do some research in youtube and google.. LOL.. on carb and block.. for port & polish.. some say according to their pantang.. polish the block is not good cause some oil tends to stick to the wall of the shiny surface..and not complete combustion..and its better to stick to unpolished wall.. ? hah..
and i finally understood how engine works.. 2 stroke and 4 stroke..
wat i can conclude is good spark plug and bigger piston + block gives more power... cause bigger space for air and oil and better sparkplug for more spark for combustion... hmm.. interesting... but wat matters is good quality of block to prevent overheating..if not good.. no use also got high power as cant bring for daily ride..
for stock block.. ppl invent the engine for lc is through careful R&D by mechanical engineer..measuring the heat produce and find a good material to overcome the heat and etc..
and yea.. bro charge.. the racing block and stuff... ppl simply create only ar...? thats why cheaper than original block...? i was wondering about this type of block..
and is bigger block produce more heat compared to stock block..? i mean cause bigger block got bigger bore ma right...? or is it the same..?
and can polish the carb bigger ar..? i mean the air flow hole for more air input..
1. I
think a shiny surface is NOT good if two of them are moving on top of each other, in this case block and piston. These things comes stock in matte surface one, enough micropores or mini little holes to hold on to EO and let the EO work to prevent friction. Imagine rubbing two pieces of glass against each other in water, it'll create a vacuum between them, dispersing off the water, and you get a big deal amount of friction...
2. Congrats on getting the concept of 2-cycle engines.
3. Reliability of block/piston depends on material used. Some places will take your stock block, send them to their own forge and make you a racing block. They are cheap probably because a good design is built using cheaper material? Some are expensive because of the surface treatment or post-processing like the Diasil thing.
4. Heat is good for combustion engine, but the idea is to get the right temp. Overheating is bad, and so is overcooling.
5. Charge is right, don't mess with a carb except the jets and needles.
QUOTE(bizzy123 @ Jun 27 2010, 05:37 PM)
Ummm... Bee Hock dont recommend us to take off air filter, he said ORI MJ and PJ is set for the bike with air filter... If u wan to take off, MJ and PJ should be changed, abo air will be more than da petrol causing it to be lean... (according to bee hock not me)
There should be notches on the main needle. If you remove air filter, use a lower notch to balance the AF mixture.