Download  Print this page

Derbi GP1 125-250 c.c. Workshop Manual Page 115

Gp1 125-250 c.c..
Hide thumbs

Advertisement

Table of Contents
Characteristic
Compression ratio - 125cc version
Re: 11,50 ÷ 13:1
The length «A" to be measured refers to the piston protrusion. It indicates me amount by which the surface formed
by the piston crown tops the surface formed by the upper part of the cylinder. The more the piston descends into the
cylinder, the less the base gasket to be applied (to recover the compression ratio) will be and vice versa.
N.B.
THE MEASUREMENT OF «A" MUST BE CARRIED WITH THE PISTON AT THE TDC WITHOUT ANY GASKET
INSTALLED BETWEEN THE CRANKCASE AND THE CYLINDER, AND AFTER RESETTING THE COMPARATOR,
COMPLETE WITH SUPPORT, ON A RECTIFIED SURFACE.
125CC VERSION WITH METALLIC HEAD GASKET (0.3)
NAME
Thicknesses 125
Thicknesses 125
114
MEASURE A
÷
1,40
1,65
÷
1,65
1,90
THICKNESS
0,4 ± 0,05
0,6 ± 0,05

Advertisement

Table of Contents

This manual is also suitable for:

Gp1 125 c.c.Gp1 250 c.c.

Comments to this Manuals

Symbols: 0
Latest comments:
  • LIAM May 27, 2017 06:12:
    HI HAVE JUST BOUGHT A DERBI 125 CC CROSS CITY, REALLY WOULD LIKE TO BUY A WORKSHOP MANUAL PLEASE CAN YOU HELP