Dolmar

[Ian C]

Not good news Ian if you want too send it down too me I will

Pressure and vac test it and go from there

do you think the cylinder is salvageable

or If you wanna do it yourself I can send you up a new piston but again possible air leak might be cause of problem

But Iam here too help sort out your saw

Thanks Andrew but the pot is goosed with a big score mark down it. It's not a lean sieze no metal transfer or anything just a big score mark where the ring has gone through the cylinder and scored the pot.

 

Sent from my SM-N910F using Arbtalk mobile app

[shavey]

I've got a 5105 here that's been driven over and is only good as parts , so I've got a good cylinder and a new or used piston already

 

And I can get that saw back on the road again

 

Cheers andrew

[Ian C]

I've got a 5105 here that's been driven over and is only good as parts , so I've got a good cylinder and a new or used piston already

 

And I can get that saw back on the road again

 

Cheers andrew

Thanks Andrew, I'm happy to purchase the used parts if you want to sell them or I can send mine back, it's a shame really as it's a nice saw too use but the reliability issues spoil it.

 

Sent from my SM-N910F using Arbtalk mobile app

[wrsni]

Check that the little peg is still in the ring groove, sounds like the ring might be creeping.

 

Very very unusual for a ring to disintegrate in any two-stroke engine unless it moves and catches a port.

[R Mac]

Check that the little peg is still in the ring groove, sounds like the ring might be creeping.

 

Very very unusual for a ring to disintegrate in any two-stroke engine unless it moves and catches a port.

 

Used to be a common problem on Kawasaki KR1/KR1S if they were raced in SS400, the pin actually burrowed into the piston due to the engine being revved at max most of the time, that allowed the ring to rotate and catch on the ports just like you say.

[wicklamulla]

Used to be a common problem on Kawasaki KR1/KR1S if they were raced in SS400, the pin actually burrowed into the piston due to the engine being revved at max most of the time, that allowed the ring to rotate and catch on the ports just like you say.

 

 

fetching fair money now so they are

[Ian C]

Andrew has contacted me and is fixing the saw with some used spares he has, Dealer service is first class even if the product needs work.

 

Sent from my SM-N910F using Arbtalk mobile app

[wicklamulla]

Andrew has contacted me and is fixing the saw with some used spares he has, Dealer service is first class even if the product needs work.

 

Sent from my SM-N910F using Arbtalk mobile app

 

 

I knew that from what i've seen, read and heard and i haven't ever bought a saw off of he:lol:

[R Mac]

fetching fair money now so they are

 

Indeed, all the 250 strokers are, nicest of them all is the last generation TZR250, the ones that weren't officially imported and in particular the SP version.

[wrsni]

Used to be a common problem on Kawasaki KR1/KR1S if they were raced in SS400, the pin actually burrowed into the piston due to the engine being revved at max most of the time, that allowed the ring to rotate and catch on the ports just like you say.

 

Is correct, but also seen it happening a very few times with poorly made aftermarket pistons, usually on scooters but could happen with anything.

 

Just be a pity if the issue in this case was preventable.