Looking for a cylinder upgrade for a Piaggio or Gilera 125 to 150cc 2-stroke, air-cooled (AC) block? Then this Malossi 172cc cylinder kit with matching head is a logical choice: everything is coordinated and you have the most important parts together in one go. Below you will find the specs, what you should pay attention to for compatibility and a few practical tips for installation and adjustment.
Why choose the Malossi 172cc cylinder?
Malossi has been a well-known name in the tuning world for years. This 172cc kit is interesting if your current cylinder is at the end of its life, but also if you just want some extra torque (especially during acceleration and acceleration). It is a great basis for a sporty street setup and is also great for hobby or track use, as long as the rest of your configuration suits it.
Technical specifications
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Engine capacity: 172cc
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Bore: 65mm
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Cooling: air-cooled, AC
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Material: aluminum with Nikasil coating
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Piston pin: 16 mm
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Number of flush ports: 6
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Exhaust port: oval
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Set usually consists of: cylinder, cylinder head, piston, piston rings, piston pin, clips and gaskets. Always check the current contents of the product.
Aluminum with Nikasil helps with heat dissipation and makes the whole more wear-resistant. How much you ultimately get out of it depends mainly on your exhaust, carburetion and (as always) the setup.
Suitability for Piaggio and Gilera 125 to 150cc 2 stroke AC
This cylinder kit is intended for air-cooled (AC) Piaggio and Gilera 125 to 150cc 2-stroke engine blocks. Be sure to check in advance: exactly which block type you have, whether it really concerns air cooling, and whether your set-up is correct with a 65 mm bore and the corresponding head construction. Are you in doubt? Place your current cylinder/head next to the product photos and specifications, or take contact Contact technical support and send your block data.
Performance and driving experience
With 172cc you usually immediately feel more torque, especially at the bottom and in the midrange. Acceleration is a little more convincing and the engine continues to “pull” for longer without quickly feeling lifeless. A higher top speed is also possible, but that depends greatly on your variator setting, transmission and the exhaust you drive.
For a setup that drives well and remains reliable, a suitable sports exhaust, a well-jetted carburetor and variator/clutch parts that can handle the extra torque are often also considered. In the categories exhausts, carburetors and variator parts you will find parts that are often used in 2-stroke tuning.
Assembly tips and points of interest
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Work cleanly. Dirt or old gasket residues surprisingly often cause leaks.
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Check the crankshaft and bearings for play before you start assembling.
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Install the piston in the correct direction and check whether the piston rings fit neatly into the pins.
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Use new gaskets and check the mating surfaces for damage.
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Install cylinder and head according to the workshop manual and the Malossi documentation that comes with the kit.
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Tighten bolts crosswise and use a torque wrench with the official tightening torques of your block.
If you have little experience with keys, it is better to have the installation done by someone who does this often. This saves a lot of hassle (and costs) if a leak or jam occurs later.
Adjustment, running-in and reliability
Na montage is de carburatie extra belangrijk. With a larger cylinder you often achieve richer spraying. Look at the spark plug color, keep an eye on the engine temperature and do not use full throttle for a long time until your adjustment is not yet completely certain. Use a good 2-stroke oil and adhere to the lubrication specifications that apply to your setup.
Drive slowly for the first few kilometers: allow the engine to warm up properly and vary the load. This allows the piston rings and tread to break in properly and reduces the risk of damage.
Legal aspects
A cylinder upgrade may affect type approval, emissions and permitted speed, and may have consequences for insurance and liability. You are responsible for complying with the rules that apply to your vehicle and use.
Frequently asked questions
Does this kit fit my model?
The kit is intended for Piaggio and Gilera 125 to 150cc 2 stroke air-cooled. Check block type and cooling. If in doubt, send your current cylinder size and block code for a check.
Do I need a different carburetor?
Sometimes a larger jet is enough, but for heavier tuning a different carburetor size may be necessary. That depends on your exhaust, intake and the character you are looking for.
Is this suitable for daily use?
That is possible, as long as the adjustment and cooling are correct and you take maintenance seriously. Reliability depends on proper installation and the correct carburetion.
Why order from Freshparts
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Focus on original parts and clear product information
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Fast shipping where possible and insight into availability
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Technical support for selection and compatibility
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Clear warranty and return conditions
Order your Malossi 172cc cylinder with head from Fresh Parts today!