Mitaka oversize pistons for GT186?

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Posts: 171
Joined: Thu Jan 08, 2009 9:51 am
Location: New Forest, Hampshire

Mon Jun 12, 2017 7:49 am

Hi guys.

Does anyone know where I can get oversize pistons and/or rings for a GT186 kit? Just back from Italy. Scooter ran well and got me back, but a "quick" :roll: strip down in Adria showed a ring gap of about 4-5mm. The grooves were pretty carbonised and the peg had all but disappeared.

Many thanks, as always....

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Posts: 116
Joined: Tue Feb 16, 2010 9:35 am

Mon Jun 12, 2017 9:31 am

Contact Richard Taylor direct on here... Rich_T

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Posts: 957
Joined: Sun Jan 11, 2009 12:49 am
ebay user ID: knowledge62
Main scooter: GP
Location: Ipswich

Mon Jun 12, 2017 10:31 pm

Hi Nic. I'm glad you made it back. Those 9 hours we spent in the workshop paid off.

Try Grampian Motors for Matika pistons.

Not the cheapest, but they are fast, things are in stock, and it is not a fake.

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Posts: 529
Joined: Fri May 29, 2009 8:07 pm
Main scooter: Li Special
Location: Birmingham

Tue Jun 13, 2017 8:24 am

4-5mm is a very big gap the ring must be worn extremely thin. Can you post some pictures and measurements, it is worth checking the bore too. How many miles have you done on this piston?

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