Ideal for the enthusiast who wants to discreetly give a little punch to his AV7 engine. Here is the AIRSAL cylinder in large diameter Ø45mm (70cc kit) for Motobecane AV7 square engine (also fits round engines). This kit is improved compared to the original, the intake port has been enlarged, the diagrams have been revised upwards while remaining moderate.
The shape of the transfers is also well improved, the price is really low for this model. This cylinder has a two-ring piston, it is delivered complete however be careful, there is neither exhaust gasket nor base gasket. This kit will offer a small gain in high rpm and a breathtaking torque all for a really ridiculous price. Its diagrams which revolve around 104 ° at the intake and 142 ° at the exhaust will exploit speeds not exceeding 7000 rpm.
The quality is still there, the cylinder is made of aluminum, treated with a good nicasil, the finish is not bad, in short it will be able to do many kilometers without any problems.
We still recommend a SHA 15mm or PHBG 17.5mm carburetor, a fairly cold spark plug (B8HS) and a well-unbridled exhaust to get the calories out of this small thermal group, the MVT SP1 exhausts work very hard on this stock cylinder, if the engine is more equipped we will recommend the DOPPLER STREET CUP exhaust , and if you touch up the diagrams, really prepare the engine to offer power, the DOPPLER ER1 will be the most appropriate.
As an option, we offer a stage 1 preparation. This preparation is a modification of the exhaust channels and port by increasing the diagram and improving the duct, which increases the cylinder's performance. An improvement to the piston and the skirt bottoms is also included in this modification. Allow a little extra time for this preparation!
Square shape like the original mounts of the following mopeds : Mobylette Motobécane / Motoconfort / MBK AV89 / AU89 / 89 Mobylette Motobécane / Motoconfort AV92 / AU92 / 92N Mobylette Motobécane / Motoconfort SP93 (Special 93) / SP93D / SP93DL Motobécane / Motoconfort SP94 TT (Special 94TT) / SP94TTé Mobylette Motobécane / Motoconfort AV98 Summit Motobécane / Motoconfort SP98 (Special 98) Original Motobécane / Motoconfort reference: 18970
Finally a cylinder head of high quality, powerful and 45mm diameter for your MOTOBECANE MBK 85 - 88 AV7 engine equipped with a kit Ø45mm! Old model with high engine attachment.
Price€49.99
Attention, may require a delay of more than 20 days!
Finally a quality, high-performance cylinder head of 45mm diameter for your MOTOBECANE MBK 40 - 50 AV7 engine equipped with a Ø45mm kit! New model with "low" engine mounting.
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