Part
Number |
Description |
Skirt |
Crown Type |
Ring Pack |
Barrel Type |
K 27 |
Piston K standard size
for use with petrol |
Full skirt |
Cone |
Two compression,
one oil control |
Iron |
K 27R |
Piston K standard size 8:1 compression ratio for use
with alcohol fuel |
Full skirt |
Cone |
Two compression,
one oil control |
Iron |
K 27/ 0 |
Piston K +1/2mm for use
with petrol |
Full skirt |
Dome with valve
cut outs |
Three
compression |
Iron |
K 27/ 2 |
Piston K 6:1 +1/2mm
compression ratio |
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Iron |
K 27/ 3 |
Piston K 7:1 +1/2mm compression ratio |
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Iron |
K 27/ 4 |
Piston KTT MK I-III
standard size 7:1 compression ratio
for use with 50/50 petrol benzol mixture |
Full Skirt |
Dome with valve
cut outs |
Two compression,
one oil control |
Iron |
K 27/ 5 |
Piston KTT standard size
6:1 compression ratio for petrol |
Full Skirt |
Dome |
Two compression,
one oil control |
Iron |
K 27/ 6 |
Piston KSS standard size
for use with 50% petrol benzol mixture |
Full Skirt |
Dome with valve
cut outs |
Two compression,
one oil control |
Iron |
K 27/
6/0 |
Piston KSS +1/2mm for use
with 50% petrol benzol mixture +1/2mm |
Full Skirt |
Dome with valve
cut outs |
Two compression,
one oil control |
Iron |
K 27/ 7 |
Piston KTT MKI-III 8.5:1
standard size compression ratio for use with Discol PMS2 |
Full Skirt |
Dome with valve
cut outs |
Two compression |
Iron |
K 27/ 8 |
Piston KTT MKI-III
standard size 10.25:1 compression ratio for use with Discol RD1 |
Full Skirt |
Dome with valve
cut outs |
Two compression |
Iron |
K 27/10 |
Piston K from KSS3800
standard size |
Slipper |
Dome with valve
cut outs |
Two compression,
one oil control |
Iron |
K
27/10/0 |
Piston K from
KSS3800 +1/2mm |
Slipper |
Dome with valve
cut outs |
Two compression,
one oil control |
Iron |
K 27/11 |
Piston K 8.75:1 standard
size for use with alcohol from KSS3800 |
Slipper |
Dome with valve
cut outs |
Two compression,
one oil control |
Iron |
K 27/12 |
Piston KTT400-on standard
size for use with 50/50 petrol benzol mixture |
Slipper |
Dome with valve
cut outs |
Three
compression |
Iron |
K 27/13 |
Piston KTT400-on standard
size for use with Alcohol Fuel |
Slipper |
Dome with valve
cut outs |
Three
compression |
Iron |
K 27/14 |
Piston KSS Ring Below Pin
standard size to engine number KSS7475. 6.8:1 compression ratio. Replaced by
K27/17 |
Full Skirt, ring
below pin |
Dome with valve
cut outs |
Two compression,
two bevel oil control |
Alloy |
K
27/14/0 |
Piston KSS Ring Below Pin +1/2mm to engine number
KSS7475. 6.8:1 compression ratio. Replaced by K27/17/0 |
Full Skirt, ring
below pin |
Dome with valve
cut outs |
Two compression,
two bevel oil control |
Alloy |
K 27/15 |
Piston KTT MK VI,Vll,Vlll
standard size |
Slipper |
Dome with valve
cut outs |
Two compression,
one slotted control |
Alloy |
K 27/16 |
Piston KTT MK Vl,Vll,Vlll
standard size |
Slipper |
Dome with valve
cut outs |
Two compression,
one slotted control |
Alloy |
K 27/17 |
Piston KSS MKII standard
size slipper type used from KSS 7476. 7.5:1 compression ratio, 8.4:1 with
compression plates removed |
Slipper |
Dome with valve
cut outs |
Two compression,
one slotted control |
Alloy |
K
27/17/0 |
Piston KSS MK II +1/2mm slipper type used from KSS
7476. 7.5:1 compression ratio, 8.4:1 with compression plates removed |
Slipper |
Dome with valve
cut outs |
Two compression,
one slotted control |
Alloy |
K
27/17/1 |
Piston KSS MKII +1mm slipper type used from KSS 7476. 7.5:1
compression ratio 8.4:1 with compression plates removed |
Slipper |
Dome with valve
cut outs |
Two compression,
one slotted control |
Alloy |
K 27/26 |
Piston K standard size
7:1 compression ratio |
Slipper |
Dome with valve
cut outs |
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X8 |
PistonKTT MK1-III standard size 12:1 compression ratio for RD1
or methanol |
Slipper |
Dome with valve
cut outs |
Three
compression |
Iron |
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M 27 |
Piston MOV, MAC standard size, 6 to 6.75:1 compression ratio depending on
compression plates fitted in year |
Slipper |
Dome with valve
cut outs |
Two compression,
one oil control |
Iron |
M
27/ AS/WS |
Piston MAF standard size complete with W.S. ring |
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Iron |
M 27/ 0 |
Piston MOV, MAC +
0.020" 6 to 6.75:1 compression
ratio depending on compression plates fitted in year |
Slipper |
Dome with valve
cut outs |
Two compression,
one oil control |
Iron |
M
27/0AS/WS |
Piston MAF +1/2mm. complete with W.S. ring |
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Iron |
M 27/1 |
Piston MOV, MAC + 0.040" 6 to 6.75:1 compression ratio depending on
compression plates fitted in year |
Slipper |
Dome with valve
cut outs |
Two compression,
one oil control |
Iron |
M
27/1AS/WS |
Piston MAF +1mm. complete with W.S. ring |
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Iron |
M 27/ 2 |
Piston Iron MSS standard
size, ring below pin stepped oil ring used up to MSS 3689 replaced by M27/3
with SL3/23 (slotted oil control ring) 6 to
6.4:1 compression ratio depending on commpresiion plates used |
Full skirt, ring
below pin |
Slight dome |
Two compression,
two stepped oil control |
Iron |
M 27/2/0 |
Piston Iron MSS + 0.20" ring below pin stepped oil
ring used up to MSS 3689 ring replaced by M27/3/0 with SL3/41(slotted oil
control ring) 6 to 6.4:1 compression
ratio depending on commpresiion plates used |
Full skirt, ring
below pin |
Slight dome |
Two compression,
two stepped oil control |
Iron |
M 27/3 |
Piston Iron MSS standard size, ring below pin std, slotted
oil control ring 6 to 6.4:1
compression ratio depending on commpresiion plates used |
Full skirt, ring
below pin |
Slight dome |
Two compression,
one slotted oil control, one stepped oil control |
Iron |
M 27/3/0 |
Piston Iron MSS +.020"
ring below pin std, slotted oil control ring 6 to 6.4:1 compression ratio depending on
commpresiion plates used |
Full skirt, ring
below pin |
Slight dome |
Two compression,
one slotted oil control, one stepped oil control |
Iron |
M 27/3/1 |
Piston Iron MSS +.040" ring below pin std, slotted oil
control ring 6 to 6.4:1 compression
ratio depending on commpresiion plates used |
Full skirt, ring
below pin |
Slight dome |
Two compression,
one slotted oil control, one stepped oil control |
Iron |
M 27/4 |
Piston Alloy MAC standard size, 6.75:1 compression ratio,
split skirt slipper piston |
Split skirt
slipper |
Dome with valve
cut outs |
Two compression,
one oil control |
Alloy |
M 27/5 |
Piston Alloy MAC
+.020" , 6.75:1 compression ratio, split skirt slipper piston |
Split skirt
slipper |
Dome with valve
cut outs |
Two compression,
one oil control |
Alloy |
M 27/6 |
Piston Alloy MAC
+.040" , 6.75:1 compression ratio, split skirt slipper piston |
Split skirt
slipper |
Dome with valve
cut outs |
Two compression,
one oil control |
Alloy |
M 27/7 |
Piston Alloy MAC +.060" , 6.75:1 compression ratio,
split skirt slipper piston |
Split skirt
slipper |
Dome with valve
cut outs |
Two compression,
one oil control |
Alloy |
M 27/9 |
Piston Alloy MSS standard size, 6.8:1 compression ratio,
split skirt for Alfin barrel |
Full split skirt |
Slight dome with
valve cut outs |
Two compression,
one oil control |
Alloy |
M 27/10 |
Piston Alloy MSS
+.020", 6.8:1 compression ratio, split skirt for Alfin barrel |
Full split skirt |
Slight dome with
valve cut outs |
Two compression,
one oil control |
Alloy |
M 27/11 |
Piston Alloy MSS
+.040", 6.8:1 compression ratio, split skirt for Alfin barrel |
Full split skirt |
Slight dome with
valve cut outs |
Two compression,
one oil control |
Alloy |
M 27/13 |
Piston Viper standard
size, 8.5:1 compression ratio, split skirt piston Alfin barrel |
Full split skirt |
Dome with valve
cut outs |
Two compression,
one oil control |
Alloy |
M 27/14 |
Piston Venom Standard size, 8:1 compression ratio, split
skirt piston for Alfin barrel |
Full split skirt |
Dome with valve
cut outs |
Two compression,
one oil control |
Alloy |
M 27/17 |
Piston Viper, Scrambler
Standard size 9.3:1 compression ratio, solid skirt for iron barrel |
Full skirt |
Dome with valve
cut outs |
Two compression,
one oil control |
Iron |
M 27/18 |
Piston Viper +.020"
8.5:1 compression ratio, split skirt piston Alfin barrel |
Full split skirt |
Dome with valve
cut outs |
Two compression,
one oil control |
Alloy |
M 27/19 |
Piston Viper +.040"
8.5:1 compression ratio, split skirt piston Alfin barrel |
Full split skirt |
Dome with valve
cut outs |
Two compression,
one oil control |
Alloy |
M 27/20 |
Piston Venom
+.020" 8:1 compression ratio,
split skirt piston Alfin barrel |
Full split skirt |
Dome with valve
cut outs |
Two compression,
one oil control |
Alloy |
M 27/21 |
Piston Venom
+.040" 8:1 compression ratio,
split skirt piston Alfin barrel |
Full split skirt |
Dome with valve
cut outs |
Two compression,
one oil control |
Alloy |
M 27/22 |
Piston Viper, Scrambler
+.020" 9.3:1 compression ratio, for iron barrel |
Full skirt |
Dome with valve
cut outs |
Two compression,
one oil control |
Iron |
M 27/23 |
Piston Viper, Scrambler
+.040" 9.3:1 compression ratio, for iron barrel |
Full skirt |
Dome with valve
cut outs |
Two compression,
one oil control |
Iron |
M 27/24 |
Piston Viper, Scrambler
standard size 9.3:1 compression ratio, solid skirt for iron barrel |
Full skirt |
Dome with valve
cut outs |
Two compression,
one oil control |
Iron |
M 27/25 |
Piston Viper, Scrambler
+.020" 9.3:1 compression ratio, solid skirt for iron barrel |
Full skirt |
Dome with valve
cut outs |
Two compression,
one oil control |
Iron |
M 27/26 |
Piston Viper, Scrambler
+.040" 9.3:1 compression ratio, solid skirt for iron barrel |
Full skirt |
Dome with valve
cut outs |
Two compression,
one oil control |
Iron |
M 27/27 |
Piston Viper, Standard
size, 9.3:1 compression ratio, split skirt for iron barrel |
Full split skirt |
Dome with valve
cut outs |
Two compression,
one oil control |
Iron |
M 27/28 |
Piston Viper, Scrambler
+.020" 9.3:1 compression ratio, split skirt for iron barrel |
Full split skirt |
Dome with valve
cut outs |
Two compression,
one oil control |
Iron |
M 27/29 |
Piston Viper, Scrambler
+.040" 9.3:1 compression ratio, split skirt for iron barrel |
Full split skirt |
Dome with valve
cut outs |
Two compression,
one oil control |
Iron |
M 27/30 |
Piston Alloy MSS standard size, 6.8:1 compression ratio,
split skirt for iron barrel |
Full split skirt |
Slight dome with
valve cut outs |
Two compression,
one oil control |
Iron |
M 27/31 |
Piston Alloy MSS
+.020", 6.8:1 compression ratio, split skirt for iron barrel |
Full split skirt |
Slight dome with
valve cut outs |
Two compression,
one oil control |
Iron |
M 27/32 |
Piston Alloy MSS
+.040", 6.8:1 compression ratio, split skirt for iron barrel |
Full split skirt |
Slight dome with
valve cut outs |
Two compression,
one oil control |
Iron |
M 27/33 |
Piston Venom standard size, 8:1 compression ratio, split
skirt piston for iron barrel |
Full split skirt |
Dome with valve
cut outs |
Two compression,
one oil control |
Iron |
M 27/34 |
Piston Venom +.020", 8:1 compression ratio, split
skirt piston for iron barrel |
Full split skirt |
Dome with valve
cut outs |
Two compression,
one oil control |
Iron |
M 27/35 |
Piston Venom +.040", 8:1 compression ratio, split
skirt piston for iron barrel |
Full split skirt |
Dome with valve
cut outs |
Two compression,
one oil control |
Iron |
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MAS 97 |
Piston, complete. MSS Standard size, for Alfin barrel |
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MAS 97/2 |
Piston, complete. MSS +.020", for Alfin barrel |
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MAS 97/3 |
Piston, complete. MSS +.040", Alfin barrel |
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MAS 97/4 |
Piston, complete. 500cc Scrambler, Clubman, Standard size for
Alfin barrel |
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MAS 97/5 |
Piston, complete. Viper
Standard size, for Alfin barrel |
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MAS 97/6 |
Piston, complete. Venom Standard size, for Alfin barrel |
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MAS 97/7 |
Piston, complete. 500cc Scrambler, Clubman +.020", for
Alfin barrel |
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MAS 97/8 |
Piston, complete. 500cc Scrambler, Clubman +.040", for
Alfin barrel |
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MAS 97/9 |
Piston complete Viper
Scrambler, Clubman Standard size for
Alfin barrel |
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MAS
97/10 |
Piston, complete. Viper +.020", for Alfin barrel |
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MAS
97/11 |
Piston, complete. Viper +.040", for Alfin barrel |
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MAS
97/12 |
Piston, complete. Venom +020", for Alfin barrel |
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MAS
97/13 |
Piston, complete. Venom +.040", for Alfin barrel |
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MAS
97/14 |
Piston, complete Viper
Scrambler, Clubman +020" for
Alfin barrel |
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MAS
97/15 |
Piston, complete Viper
Scrambler, Clubman +.040" for Alfin barrel |
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MAS
97/16 |
Piston, complete Viper
Scrambler, Clubman Standard size for
iron barrel |
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MAS
97/17 |
Piston, complete Viper
Scrambler, Clubman +.020" for iron barrel |
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MAS
97/18 |
Piston, complete Viper
Scrambler, Clubman +.040" for iron barrel |
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MAS
97/19 |
Piston, complete. Viper standard size for iron barrel |
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MAS
97/20 |
Piston, complete. Viper +.020" for iron barrel |
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MAS
97/21 |
Piston, complete. Viper +.040" for iron barrel |
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MAS
97/22 |
Piston, complete. MSS Standard size for iron barrel |
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MAS
97/23 |
Piston, complete. MSS +.020" for iron barrel |
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MAS
97/24 |
Piston, complete. MSS +.040" for iron barrel |
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MAS
97/25 |
Piston, complete. Venom standard size for iron barrel |
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MAS
97/26 |
Piston, complete. Venom +.020" for iron barrel for iron
barrel |
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MAS
97/27 |
Piston, complete. Venom +.040" for iron barrel for iron
barrel |
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MAS
97/28 |
Piston, complete. Scrambler, Clubman, Thruxton, Endurance standard size for iron barrel |
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MAS
97/29 |
Piston, complete. Scrambler, Clubman, Thruxton, Endurance +.020" for iron barrel |
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MAS
97/30 |
Piston, complete. Scrambler, Clubman, Thruxton, Endurance +.040" for iron barrel |
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T2/2 |
Piston, cast iron U,
USS, 32 |
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RT 27 U |
Piston, aluminium U,
USS, 32 |
Two Stroke |
Deflector |
Two compression |
Iron |
RT 27/2 |
Piston 1930 GTP standard size |
Two Stroke |
Deflector |
Two compression |
Iron |
RT
27/2/0 |
Piston 1930 GTP +1/2mm |
Two Stroke |
Deflector |
Two compression |
Iron |
RT 27/3 |
Piston GTP standard size |
Two Stroke |
Deflector |
Two compression |
Iron |
RT
27/3/0 |
Piston GTP +1/2 mm |
Two Stroke |
Deflector |
Two compression |
Iron |
RT
27/3/1 |
Piston GTP +1 mm |
Two Stroke |
Deflector |
Two compression |
Iron |
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