Replacement Piston Kit To Fit The Bultaco 250cc We identify this as a 1698 piston type.
Italkit List This As Fitting The Pursang MK 5-6-7 Alpina Sherpa, But It Does Fit More Models, See Technical Info Below.
With the Bultaco engines it is very hard to identify what engine you have, mk1,2,5 etc so we have tried very hard to help you get the correct piston.
This Piston Has A Original Bore Size Of 72.00mm, Over Sizes Avalbey In The Drop Down List.
The Piston Ring Locating Pegs Are At The Front Of The Piston (The Exhaust Side) These Ring Pegs Are 57mm Apart.
It Has A 16mm Gudgeon Pin Dimension B
The Crown Height Is 29mm, This Is Measure From The Centre Of The G-Pin Hole To The Edge Of The Crown Dimension C
The Dome Height Is 5mm Dimension AC
The Overall Height Is 69.00 Mm Dimension L
Italkit recommend the following piston to bore clearances
Trail 0.04mmm
Enduro / Road 0.07mm
Motocross / Road Race 0.09mm
This Italkit piston benefits from being mad from a new mould with a new designed to the inner part of the piston, it includes more reinforcement ribs and a newly developed piston skirt profile.
They have done this to improve the strength and durability in racing particularly when used on road / race tracks.
The piston / G-Pin Is of biconical designed for more strength but at the same time being lighter.
The piston Rings Are 1 Steel Chromed Ring and 1 Steel Ring to ensure a better seal between the piston and cylinder sleeve.
Over All A High Quality Replacement Piston.
Need your Bultaco cylinder Re-bored, then our cylinder department can handle this for you, cylinder on maximum oversize then no problem we can re-sleeve your cylinder back to standard bore, please get in touch if you need this service.
Motocross Moto-X Spare Parts 