gap

[murdock]

Hello, after 40 days the cruzzing pistons have arrived in Spain, if I had bought them elsewhere I would already be enjoying the motorcycle, just today I started a dispute with PayPal to get the money back and the shipping information was updated. 14 days in Tokyo and 25 days nobody knows where, they are still in customs, but when they arrive I must go to the rectifier (as they are called here) to enlarge the cylinders,
what is the gap I need? I have read that Honda works with very little tolerance, but I do not know what exactly, if someone could help me with this I would appreciate it
I have bought pistons of + 0.50
59 mm.
I don't understand the manual very well

[philward]

Not sure if this is what you are looking for murdock - this applies to 400Four and not sure if same for 550
http://www.sohc.co.uk/index.php/topic,24199.msg233777.html#msg233777
'1 thou' equals 0.0254mm

[Bryanj]

Pisto to bore clearance is 1 thousandth of an inch or 0.025mm and yes it is that small no matter what the people machining the bores say

[fogrider]

There are 2 errors on that chart which will create some confusion !

[Nurse Julie]

There are 2 errors on that chart which will create some confusion !

Which errors 🤔

[K2-K6]

There are 2 errors on that chart which will create some confusion !

Which errors 🤔

Piston diameter of 54.47 to 58.49 with a range of 4.02mm  that would let some oil past 

[Nurse Julie]

There are 2 errors on that chart which will create some confusion !

Which errors 🤔

Piston diameter of 54.47 to 58.49 with a range of 4.02mm  that would let some oil past 

Oh yes, I see now Nigel ☺️☺️☺️

[Moorey]

  It makes getting the rings in easy though. 

[K2-K6]

  It makes getting the rings in easy though. 

Yep, you could throw them in like quoits from the other side of the workshop.

[fogrider]

The other one is in piston diameter - 58.35  is 2.297, their figure shows a piston bigger than the original.

I find it better to substitute MAXIMUM for their word serviceable, it makes more sense to me that way.

[murdock]

Obviously the author of the manual was not a sociable person or somebody disturbed, I don't know ..jua jua
but I still do not know what the gap would be that I should request from the machinist between cylinder and piston

[murdock]

if someone fills this photo correctly it would do humanity good

[Nurse Julie]

if someone fills this photo correctly it would do humanity good

Your picture is incorrect. The piston will be in the centre of the bore and as you are using Cruzinimage pistons you need a piston to bore clearance all round  at the piston skirt of 1 thou inch which equates to 0.0254mm

[murdock]

Ok, perfect, thank you very much

[fogrider]

So to fill the figure in on Murdocks' drawing would be two thou , one each side ?