suzuki pistons

[LWC82PE]

can anyone tell me what size a GT750 piston is (bore size)

[GD66]

GT750 were 70 x 64mm bore and stroke.

[LWC82PE]

ok thanks. Do you know any suzuki road bikes with 67mm pistons? GT380???

[MX?]

According to the X ref:
70mm piston

Part # = 12103-31830-050
Part Description = PISTON SET
Model Count = 16
GT500A 1976 492 GT500 TITAN STREET
GT500B 1977 492 GT500 TITAN STREET
GT750-B 1977 738 GT750 LEMANS STREET
GT750A 1976 738 GT750 LEMANS STREET
GT750J 1972 738 GT750 LEMANS STREET
GT750K 1973 738 GT750 LEMANS STREET
GT750L 1974 738 GT750 LEMANS STREET
GT750M 1975 738 GT750 LEMANS STREET
T500-2 1969 492 T500 TITAN STREET
T500-3 1970 492 T500 TITAN STREET
T500 1968 492 T500 COBRA STREET
T500J 1972 492 T500 TITAN STREET
T500K 1973 492 T500 TITAN STREET
T500L 1974 492 T500 TITAN STREET
T500M 1975 492 T500 TITAN STREET
T500R 1971 492 T500 TITAN STREET

[LWC82PE]

ok thats 70mm im looking for 67-69mm range.
found out GT380 is no good, pistons are 2.13"

[lukeb1961]

67mm - you mean as an RM/PE250 alternative, or for something strange?

the 380 was  54mm x 54mm
the 550 was  61mm x 62mm
the 750 was  70mm x 64mm

does it have to be Suzuki?
e.g. the Kawasaki KDX2220 piston was 69mm  or.. what about the newer KTM's - say their SX220?

[LWC82PE]

just imagine a PE175 piston but bigger. Cant have port holes in piston skirt.

[lukeb1961]

some sort of crazy TS is it? 69*57 = 213cc   mmmmm :-)

[DR]

'87 LT250R QUAD RACER 67MM X 70MM 18mm Pin

[LWC82PE]

67mm with 16mm pin looks like an impossible combination. looks like im going to have to go to 18mm

is the LT250 piston anything special? i would assume it has some port windows/holes in the intake side of piston???

[TT5 Matt]

just looking at a it175d piston and it takes a 16mm pin aswell and is 66mm std bore size,theres a 2/3mm difference in the compression height compered to the 185 piston and 4 mm shorter on the bottom of the skirt,you should be able to find a non reed cutout piston pre ct1

[LWC82PE]

i had thought about IT 175 pistons but had no idea what they looked like. since you say they have 4mm shorter skirt than TS that automatically means is a no go unless the IT piston is 4mm higher aswell. If thats the case then all i need is a 4mm spacer to lift the barrel up to correct height.

anyone got a photo of a IT 175 piston? i wonder how a DT 175 piston compares?

did you mean to say pre 81?

[TT5 Matt]

the yam piston is shorter in both dirrections of the piston pin that could be adjusted be machining the bottom of the barrel and as far i know the it and dt175 run the same bore and stroke even the same crank and rod and i think earlier non reed valve pistons from ct1 175's would work maybe Nathan s could shed some light on this as he's a yamaha fan and knows what goes with what

[LWC82PE]

ok i will see if i can investigate a CT 175 piston.

[TT5 Matt]

there cheap as $37 ozzie landed for a 1mm over piston kit bargin of the year!!