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Re: Which pistonm in 71mm clears the boost port on a TS1
Posted: Sun Jan 11, 2009 9:49 am
by Powolotti
I will check this and let you know, I know a few lads running this piston and they say it fits without repegging. WCLW site says lower peg is inside the boost port, but I´m quite sure I saw a picture on GSF showing this is not the case with unmodified (widenend) ports. Get back to you soon...
Re: Which pistonm in 71mm clears the boost port on a TS1
Posted: Sun Jan 11, 2009 1:24 pm
by J1MS
How much is a new genuine H2 750 71mm piston complete with rings worth these days? anyone know

Re: Which pistonm in 71mm clears the boost port on a TS1
Posted: Sun Jan 11, 2009 2:05 pm
by Adspeed
Re: Which pistonm in 71mm clears the boost port on a TS1
Posted: Sun Jan 11, 2009 2:22 pm
by davidblythe
good idea
presume that best to do this on a wire ring only, moving the ring round like that
what did you use to cut the notch, rather do it right
Re: Which pistonm in 71mm clears the boost port on a TS1
Posted: Sun Jan 11, 2009 2:29 pm
by byron
Adspeed wrote:... the peg was not moved just moved ring round......this pic is after 2 years of hurtlin about.......This year will be its fourth year and now issues. .
nice solution
Re: Which pistonm in 71mm clears the boost port on a TS1
Posted: Sun Jan 11, 2009 3:42 pm
by Ken Tucky
If its any help, I have been using Adspeed's solution in my sprinter for some time now.
Not had any ring failures - famous last words....
Mind I'm running at 100mph + at the end of the quarter mile so I reckon you'd be OK with this solution!
Mr Tucky
Re: Which pistonm in 71mm clears the boost port on a TS1
Posted: Sun Jan 11, 2009 4:03 pm
by davidblythe
Ken Tucky wrote:If its any help, I have been using Adspeed's solution in my sprinter for some time now.
Not had any ring failures - famous last words....
Mind I'm running at 100mph + at the end of the quarter mile so I reckon you'd be OK with this solution!
Mr Tucky
What piston and barrell are you using if you dont mind me asking
Re: Which pistonm in 71mm clears the boost port on a TS1
Posted: Sun Jan 11, 2009 6:04 pm
by Ken Tucky
No problemo David.
Piston is 71.00 Wiseco Yamaha YZ 250 G,H,J 1980 -1982
Barrel is TS1
Hope this is of some help.
Mr Tucky