New guy GILERA SC125 help NEEDED
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@gilerasc125 as regards to orignal piston
The Bikes only done 6100 miles. Why would you need to Bore it out to 57mm in that time?
In the space of two owners? These are pieces im trying to put together. The Bike has been derestriced. As For orignal piston siezure marks on front and rear looks mainly threw hear siezure so down to owner neglect running the Bike on No oil or cheap oil. -
@gilerasc125 If the engine was scored badly it may have required an overbore.
You really think the theives that stole my bike warmed it up before storming up the road on it. Yes it's not great for the engine, but they would withstand the punishment.
So I would check to make sure the fueling hasn't been messed about with and the oil pump is not faulty. Check that the CDI is firing correctly, and not firing way too early.
Also it's possible that the mileage is less than accurate, I.E. the speedo has spent a lot of time disconnected.
MOT History check the vehicle to see if only a few miles pass year on year. That might indicate it's not been recorded accurately.
I know my MOT for my DT says it's on 300 miles when in actuality it's done 20K
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@Calum ive fully Service history For this Bike confirming milage. Will put a video on it idling so people can get a Better idea
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@gilerasc125 West Midlands.
Something is definitely amiss. I've seen people on here get like 20K out the original piston. Someone claimed they have 40'000Km out of the original top end on here.
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From experience it tends to be running too lean that kills two strokes. Though a 2 stroke makes more power the leaner it runs. At 57mm you often have to modify the power valve for clearance. And the head gasket will need opening up. When the barrel 1st seized they might have replaced it with a 'good' second hand barrel that had already been taken out a few sizes.
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@DTR-NSR 
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@gilerasc125 Are you using your phone to access this forum??? As that will cause problems uploading pics.
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@gilerasc125
The powervalve is meant to have to have two pins that help it stay together in the centre when you run the bolt threw. My pv hant got them pins -
@gilerasc125 That's why you can't upload any pics, as the forums software is buggy with mobile devices. Using a PC of some form is the best way to access this friendly forum.
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@NINJA I rarely have issues with this forum from a mobile device. What browser are you using? I always use Firefox and can use all the features just fine.
You should be able to request a desktop version from your mobile.
The website is written in Bootstrap CSS, meaning that really its the same code for desktop and mobile. So any bug that exists would be present in both systems.
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