FB babe of the day:
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API SG vs SM from Wikipedia:
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It's worth trying to add Diesel grade EO, like API CH, CI, CJ etc as motorcycle EO, because it has far better detergency and acid-neutrality which is good for long term use. However, because car EO are not designed for our wet clutch, it may cause clutch slip. Then again, clutch slip is found to be caused by moly additives..
I would recommend diesel EO, mix with 20% of gear oil of 80W or 90W into motorcycle use.
Personally, I'm have a Shell Ultra Fully synthetic 5W-40 and a bottle of Slick50 90W gear oil.
Added on June 9, 2011, 1:47 pmI think you confused
engine displacement capacity vs
block capacity.
Engine displacement is the CC displaced when the piston goes from TDC to BDC... this is a fixed number given a bore and stroke. So, the bigger the block capacity, the smaller the compression ratio.
Example:
- If the
block capacity when the piston at bottom is 206cc.
- At full compression, when the piston go to the top, it displaced 186cc.
- Becaused it compressed from 206cc to 20cc (206 - 186), compression ratio is 206 : 20 = 10.3 : 1.
Given the example above, assume a 62x61.7 piston (186cc).
- And you reduce 2mm on the gasket or skim the head.
- This reduce an equivalent bore x stroke of 62 x 2.
- This reduced 6cc of the
block capacity, from 206cc to 200cc.
- Now, compression is from 200cc to 14cc (200 - 186), becomes 200:14 = 14.3 : 1.
So, given the same
engine displacement, you can achieve different
compression ratio by changing the effective
block capacity.
I used this website to calculate:
http://www.ducatitech.com/info/bore.html
Added on June 9, 2011, 1:52 pm@patrick: too many plug kaki will block the combustion wave front.
Sifu is sifu, kenot change the fact.
thanks, very detail explanation...
Anyone tested New 5speed lc TOP SPEED?
I heard 120km/h, if on GPS tats fast man....
Just speculation, havent go detail bout it...