Piston problem ? - MVAgusta.net
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post #1 of 3 (permalink) Old 07-30-2016, 02:30 PM Thread Starter
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Piston problem ?

Hi all of you ,
I bought 2 125 cc gtl engines from italy as spare to my centomila 125 cc
I will build a little funny engine to drive with , and hopefully little more horsepower and a 5 th gear ,
In the gtl engine have 54,4 mm piston Borgo with 3 rings , i have a new 54,6 mm sport piston with 4 rings ,
As i read 125 gtl bore is maximum 56 mm nore , i think my sport piston is for a gtls , can that be correct?
Why is it 3 rings on one piston and 4 on another ? Both are Borgo
Kind regards Åke
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post #2 of 3 (permalink) Old 07-31-2016, 01:39 AM
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Location: FRANCE
Posts: 178
The second scrapping ring on the lower part of the piston skirt is an older piston design of the 50th (four rings pistons)
No problem to fit either three or four rings pistons

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post #3 of 3 (permalink) Old 08-01-2016, 04:06 AM Thread Starter
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thanks for the info . GTW36
another question on 125 gtl .. what is the difference to gtls engine . i saw a number of 13 hk in gtls
is there another camshaft in gtls or is all that power in a compression increase?
kind regards Åke
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