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Need help for a new piston for malossi 180 cylinder

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Rustic
Derestricted Danger



Joined: 19 Sep 2016
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PostPosted: 14:42 - 07 Mar 2025    Post subject: Need help for a new piston for malossi 180 cylinder Reply with quote
my NSR italian JC22A*** now it has 15300km
I've done about 4000km with a malossi 180cc, 32mm PWK, and a jolly 401 exhaust. although it gets to 130khm really fast, I feel it has lost some power, what I remember wossner has great pistons, which exact piston/size/brand should you guys recommend?
I believe malossis manual had pistons for sale different sizes but I cant seem to find them, but I would preffer a wossner piston.

I also disabled the exhaust valve because didn't get the malossi extra part, but from my understanding the exhaust valve only helps to get more torque on low revs. Also using no filter, I used to have a ramair car filter which fitted perfectly but it desintegrated with time and now with no filter runs good too .
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sickpup
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Joined: 21 Apr 2004
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PostPosted: 20:37 - 19 Mar 2025    Post subject: Re: Need help for a new piston for malossi 180 cylinder Reply with quote
Rustic wrote:
which exact piston/size/brand should you guys recommend?


Can't tell you without measuring the bore and bore to piston clearance.

Is the piston you have a single or twin ring piston and have you regularly changed the rings as required?
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