Piston Size EC300

[stian]

Hi. Un-marked cylinder on my EC300 07, in need of the measures for A,B,C,D piston. Anyone?

Thanks

[Moto7man]

Did you look under the intake for the letter?

[Jakobi]

You'll need a bore gauge to determine what size piston you require.

http://www.wossnerpistons.com/

Difference from A to B is 0.01mm, and so on from B to C etc

[stian]

Originally Posted by Moto7man

Did you look under the intake for the letter?

The cylinder is marked E on the intake side, 2cm from bottom. Clearly, piston size is marked A-D, so cylinder is unmarked.

Using a bore-gauge tomorow. Typical that im in a hurry and get and unmarked cyl.

Still have not answered my question thought. I still doesnt know what size A, B or D is. If I measure XX,96, still doesnt know what piston I need.

Please clearify what size for example A piston or D piston are.

[Elvis74]

The clearance between the cylinder and the piston should be around 0,06mm!
Means, when measuring 72,00 on the cylinder the piston is 71,94!

[Anders]

Originally Posted by stian

Please clearify what size for example A piston or D piston are.

If you take a look at Wossner's home page and select your engine size and year, they will show you what bore size pistons A B C will fit.

[stian]

Originally Posted by Anders

If you take a look at Wossner's home page and select your engine size and year, they will show you what bore size pistons A B C will fit.

Sat on my phone due to work.

(penger er forovrig overfort, igjen; takk! )

[hamilton]

Since I was bored here's the sizes.
std bore - 72.00mm
A piston 71.93mm
B piston 71.94mm
C piston 71.95mm
D piston 71.96mm
0.07mm piston clearance
as per Vertex

[stian]

Originally Posted by hamilton

Since I was bored here's the sizes.
std bore - 72.00mm
A piston 71.93mm
B piston 71.94mm
C piston 71.95mm
D piston 71.96mm
0.07mm piston clearance
as per Vertex

My cylinder is 72,01mm. Makes my piston with 0,07 in clearence a B piston.
isnt 0,07 too much? Ive heard more 0,05-0,06 (making my piston A)

[Jakobi]

Originally Posted by stian

My cylinder is 72,01mm. Makes my piston with 0,07 in clearence a B piston.
isnt 0,07 too much? Ive heard more 0,05-0,06 (making my piston A)

Thats backwards. An A piston will give you more clearance again. Based on what you specced your cylinder at Wossner suggest a B which gives 0.07mm clearance. Thats a forged piston, so you may wish to run a bit more than a cast. I'm sure you could drop a C piston in and still be fine, but what if..?

What was the size of the piston you just pulled out?