observation on SMB135E YUTONG ZK6126
zf is really quiet , but engine is very noisy
door open and close also very noisy
seats are quite good but , when bus brakes , some ppl will
probably slide and create a " farting" sound
gear change is smooth, suspension also not bad
it's like a mixture of dennis lance/trident , merz 0405 ,
0c500le
max speed for the bus is 140km/h , required bc to wear seat belt
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(duplcated from Yutong forum )