DT125R FORUM

@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

@NINJA yes

@NINJA thats like trying to speak mandarin

@DTR-NSR ![alt text))
Taken power valve out now was all full of carbon cleaned up nice. There is a groove thats been cut into it as in machined. Got all the pics but want let me post them. Luckily piston and rings are good. When i was removing pv it had been pinned in the wrong direction

@Calum ive fully Service history For this Bike confirming milage. Will put a video on it idling so people can get a Better idea

@Calum thanks man. Where you based pal?

@Calum this is what im trying to put together callum. That a engine with such little milage
Shoukd be sweet not in this state.

@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.

@Calum hi pal the engine was built just like my other two strokes i have there fine.
I am not a noob lol but just cant get to grips with whats going on only way of finding out is two tear it back down

@DTR-NSR thanks pal. Only discovered the fact it had a rebore when fitted a new top end. The garage i bought from told it was on orignal Bore . The old piston was fully siezure marks to the front and rear. Yet the barrel was fine. On the orignal head gasket No apparence of damage and powervalve was working fine. Since the top end only ran For 5mins sounds like the piston is coming in contact with something.

@NINJA hi pal thanks For reply
Everythings brand new with the top end the Bike seen 5mins idling. Just doesnt sound right sounds like the piston is coming into contact with powervalve. All new gear oil and coolant.
However the Bore is 57mm so it has been rebored.

Hi folkes so my gilera Sc125 is 2008
It has Covered 6100miles. Its used a yam dt125r engine. Change the top end turned it over Today For engine to sound like there gritty
Nocking sound immeaditley turned it off. Train to work out if its the main bearings or big end?? Or some carbon thats fell off the power valve into the cyclinder.
Any help or suggestions much NEEDED lol
I thought these engines where tough