yamaha pistons

[sjc]

is there any difference between a dt175 piston and a it 175 piston? many thanks steve...

[J1MS]

YES.

Ring peg positioning is further apart on the IT....

[sjc]

got a steel linered mb stage 2 ts1200 runnin 115mm conrod,, with a dt 175 piston,just wondered if you run the it 175 as they are easier to get hold of cheers steve..

[J1MS]

I think the IT piston is more suited to the TS1 200.

[sjc]

its either the it piston or a mb racetour but alot of money difference,,

[Fruitjuice]

The IT175 or YZ175 pistons are easy to get hold of and come pretty cheap, I've used the Wiseco forged pistons twice with good results, but the MB-site says they've experienced ring peg failure with these in the past... There's also a Wossner-version about, but haven't tried that yet...
My kit had a reprofiled head, so not sure the dome on the Yamaha/Wiseco-piston is the same as on the original Asso-piston...

[J1MS]

Yes you will need to re-profile the head if switching from An asso piston to a yamaha IT but if you already use a Yamaha DT piston the profile should be OK.

[mickdale]

wossner IT 175 piston - superb light racing piston with coated skirt @ 66 quid?

over here in houston they are using ceramic thermal coating (sprayed on) that resists heat transfer from the combustion chamber - as it wont cost, might get my crown done?????

will speak to harry when im back in the uk about it

[gaz_powell]

MB used to use the IT and not the DT (the it piston ring pegs are as the asso piston)
The IT piston you want is the 1980-1981 3R6

good place is ebay - there`s always a good supply in america for good prices and they use DT rings

[Rosi-C9]

Left: Wiseco DT 175 471M06700 used in my T5 Yam Conversion
Right: Wiseco IT 175 374M06600 used in my TS1 200