【SIP PERFORMANCE】Crankshaft SIP PREMIUM by MAZZUCCHELLI

Engine type：125-150cc，Largeframe
Crankshaft type：Disc Valve
Stroke：57 mm
Connecting rod bearing：15x19x20 mm
Pin 15mm
Cone 20/25mm，M12x1.25
Φ Oil seal seat on flywheel side：20 mm
Φ Bearing seat on flywheel side：25 mm
Thread on flywheel side：M12x1，25
Thread on clutch side：M12x1，5
valve timing：112°/6° post TDC
modified for PX ignition

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A contact breaker ignition is prone to faults，only suitable for tuning to a limited extent and always a risk factor on long journeys.
This is why it is often replaced with an electronic Ignition.
Fans of the Vespa 125 VNB/GT/GTR//Super/TS/150 VBA/VBB/VGLA/B/GL/Sprint/V/Super previously only had the option of installing a BAJAJ ignition of debatable quality or a first-class but expensive VESPATRONIC ignition.
At the suggestion of STOFFI’s Garage，SIP has taken on this problem.
The solution is a fusion of two crankshaft types.
The basis is the classic Sprint Crankshaft with the original Bearing and shaft seal seat.
This is combined by MAZZUCCHELLI from the factory on the fan wheel side with a revised Cone of the modern PX Shaft.
The clutch side remains unchanged.
With this SIP Crankshaft it is possible to use the proven and inexpensive electric Ignition of the PX on these oldies.
The Oil Seals and Bearings remain original Sprint.
Due to the housing tolerances，clearance or ignition problems may occur when fitting the Ignition .
To prevent the Wire from being crushed or the Base Plate having to be modified，we recommend installing a Spacer under the Stator Plate.
Conclusion：Perfect solution for conversion to electric Ignition
Crankshaft / 57mm stroke / 20/25mm / M12
Crankshaft for conversion to PX Ignition with Φ 95mm Lima cheek，Φ 97.9mm rotary valve cheek，shaft seal seat 20mm，bearing seat 25mm，blunt/thick Cone of the PX with M12mm thread，including connecting rod bearing
SIP-TiPP：Don’t forget new Woodruff Key，M12 pole nut and Lock Washer.
Order a PX Lusso Stator Plate and PX Flywheel such as SIP Touren，PX200 or even a VAPE ignition.
The Spacer for the ignition base plate ＃ 50011300 is also useful.
Robert Zinnocker “Zini”.
STOFFI-SIP Racing Team：
“We’ve been waiting for this for years.
At last，the old sprint engines can be converted to electric Ignition cheaply and reliably.
Perfect.”
The timings stated above were determined viewing in the direction of the clutch side.
That means：”138°/6° after TDC：Inlet timing begins 6° after TDC and stays open for 138°.
Please note that the angular degrees given here are approximate values，as the crankshafts are reworked by hand.

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適合車種： 125、125 (T2／125) (D)、125 GTR、125 GT／125 Sprint、125 S、125 Super、125 TS、150、150 (T4／150) (D)、150 GL、150 GL Touring (DK)、150 Spr... ( 対応モデルを見る )