A mathmatical question

pappa_golf

sorted , ta

mgdavid

pappa_golf wrote: »

sorted , ta

and now the spelling's sorted too !

NCC-1701

mgdavid wrote: »

and now the spelling's sorted too !

It's not!. So OP can't do the maths or the spelling! Or the posting etiquette?

agrinnall

NCC-1701 wrote: »

It's not!. So OP can't do the maths or the spelling! Or the posting etiquette?

It is in mgdavid's post title. But I agree about the etiquette, and the OP should know better.

pappa_golf

unfortunately the board would not allow me to fully remove the posting .


however if you wish to help , what is the piston running clearance on a 1976 Kawasaki ke125 expressed in thou, , would you abide by the manufacturers specs from 40 yrs ago , or ere on more modern silica based units

hans_2

pappa_golf wrote: »

unfortunately the board would not allow me to fully remove the posting .


however if you wish to help , what is the piston running clearance on a 1976 Kawasaki ke125 expressed in thou, , would you abide by the manufacturers specs from 40 yrs ago , or ere on more modern silica based units

0.002 inches for every inch of piston diameter.

Not a mechanic and information source is here.

pappa_golf

yes , is that info for a 2 stroke and is it for a cast or forged piston ?


the figure there is the direct opposite if a figure quoted by Kawasaki , for a enuine piston back in 1977 , they state 0.025-0.035mm , the 2 thou per inch would give something like 0.1016 mm which is 4 times the original figure


the reason for retracting my question was that I realised people would just google an answer , which in a lot of cases would not refer to a 2 stroke of this era


over the last 20 yrs , tollerances on new vehicles have tightened up , this bike is 40 yrs old with an aftermarket piston

John_Gray

So we have become less tolerant as time has progressed?

pappa_golf

or more tolerant on pollution , nothing like the haze off a 40 yr old 2t in the morning , however new ones are banned now

hans_2

Kawasaki KE125 Service Manual Page 107

pappa_golf

many thanks for that , that info I did not have (saved now)