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Which pistonm in 71mm clears the boost port on a TS1
Posted: Sat Jan 10, 2009 7:05 pm
by davidblythe
Help
One Wiesco TS250 piston peg is too closse to the boost port
OEM KH750 are rocking horse sh*t
KX250 run in the boost port
does anyone know of another piston for a 116 rod 18mm small end
Re: Which pistonm in 71mm clears the boost port on a TS1
Posted: Sat Jan 10, 2009 7:14 pm
by RinB
David
H2 750 I get here have to buy 3 but Ill have one off you, Im sure some one else on here will have one m8
https://www.z-power.co.uk/merchantmanag ... ts_id=1545
Let me know
Smiffy
Re: Which pistonm in 71mm clears the boost port on a TS1
Posted: Sat Jan 10, 2009 7:32 pm
by CT.
I think you can get the Wiseco ones seperate on ebay.com .It's the same one used in the 475cc Kwak jetski (423m07100).
Re: Which pistonm in 71mm clears the boost port on a TS1
Posted: Sat Jan 10, 2009 7:58 pm
by byron
I think those wiseco 423M07100 pistons have 16mm pin
individually they seem to $100 ish on usa ebay, so might actually be cheaper buying from z-power [and they're a good shop]
I'm after one for my 240 [ish] build, so would go thirds. standard size ?
Re: Which pistonm in 71mm clears the boost port on a TS1
Posted: Sat Jan 10, 2009 8:11 pm
by Powolotti
Wiseco 423 (H2 750 and Jetski Bigbore) has the pins above each other and running in boost port, see my modified piston before repegging...
http://picasaweb.google.com/Powolotti/N ... 4679660482
Wiseco 439 needs no repegging with unmodified boost port, but uses 18mm gudgeon pin
Re: Which pistonm in 71mm clears the boost port on a TS1
Posted: Sat Jan 10, 2009 8:22 pm
by CT.
Powolotti wrote:Wiseco 423 (H2 750 and Jetski Bigbore) has the pins above each other and running in boost port, see my modified piston before repegging...
http://picasaweb.google.com/Powolotti/N ... 4679660482
Wiseco 439 needs no repegging with unmodified boost port, but uses 18mm gudgeon pin
Good tip powlotti.
I take it that the 423 will still be good if you intend to do an old school 240 iron conversion (unless boost porting) though ?
Re: Which pistonm in 71mm clears the boost port on a TS1
Posted: Sat Jan 10, 2009 8:27 pm
by Powolotti
it´s a light piston, still extremely reliable. Perfect for that piston ported 240 - needs no repegging but longer rod. Just take care you don´t go mad with the top of the inlet, so the lower ring does not catch in it.
Re: Which pistonm in 71mm clears the boost port on a TS1
Posted: Sat Jan 10, 2009 8:48 pm
by davidblythe
knew the wiesco kh750 piston ran the pegs in the boost port, why i wanted to find OEM H2 pistons, 16mm wasnt a major issue as would have used a rd400 rod
WIESCO 439 ?
Re: Which pistonm in 71mm clears the boost port on a TS1
Posted: Sat Jan 10, 2009 8:50 pm
by byron
so a yamaha [?] 115mm rod on 58mm Indian webs giving 230cc would work ok ?
bearing in mind the inlet remark, thanks, good tip
I was initally thinking about a 60mm crank, but picked up a cheap GP crank [cheers mark], so am planning around that.
Re: Which pistonm in 71mm clears the boost port on a TS1
Posted: Sat Jan 10, 2009 9:03 pm
by davidblythe
KAW250KX 78-86,KXT THRU 87 2756CD"
Quantity in Basket: none
Code: 439M07000
thought these ran the pegs in the boost port