Lifan 140cc 1P55FMJ Cam Sprocket?!

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yep:) even the little m6 bolt on the outside lines up.

piston wise, looking at the akunar AKPRP007F,G,H so 52.5, 53, and 54mm respectively.

13mm gudgeon/wrist pin, 14mm deck height, 5.5mm dome height
(and isnt that site grumpy about copying images/details?)

dhz does have one but it has the step to suit the small valve head,(and no info on deck height etc, i could have measured it, but didnt), the akunar is a full dome type. hard choice is the cost... damn shippin fees:( meh, whats the point of having money unless you spend it? orderered.:) going 53 so i can always bore out another 1mm when and if i have to. now i just gotta find someone that will bore it... boring:p
 
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The bottom of the sleeve gets pretty thin at 54 mm ...
 
yep... tis why i went 53. leave something down there. yeah, bottom only measures 56...pretty tight. 1.5mm sounds better than 1mm... 1.75 would have been better, but still gotta bore it out to 52.5,(even if that genuine lifan 52.5 fitted) so...

53 it is.

now i wait and twiddle my thumbs:)
 

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