DollarStoreMotorcyclist
New Member
So some time ago, I made my first post here and got help with fixing the main jetting on my carb and now with my 32t sprocket I'm cruising shy of 30mph with this 50cc kit.
I'm still power hungry so I checked my squish gap with solder wire and I had to fold it 3 times before it squished the wire at all, which I measured to be about 4.5mm.
Now I got the cylinder block and the cylinder head off and looking at it I can't tell if there's any squish band at all but there's still enough clearance to still sand the cylinder down a millimeter for more compression anyways.
I start looking at the cylinder and piston for any wear and I see this wide but shallow streak on the piston and cylinder on the exhaust side. Not sure if it's a cause for concern but I don't think it looks good. Obviously, there's also a lot of carbon buildup on the piston and cylinder head which is probably from my engine always running too rich until recently and the fact I accidentally ran 8:1 fuel/oil mix for the first 40 miles I have ridden this engine.
So what I'm asking is: 1) Is there a squish band at all? 2) Should I still go ahead with sanding a millimeter off the cylinder? 3) Is that streak on the exhaust side of things a cause for concern? 4) What should I do about cleaning that carbon buildup?
Any comments about what you guys think the condition of this engine so far is also appreciated. This engine currently has 500 miles on it. The shiny particles in the cylinder is from paper towel cleaning not metal.
I'm still power hungry so I checked my squish gap with solder wire and I had to fold it 3 times before it squished the wire at all, which I measured to be about 4.5mm.
Now I got the cylinder block and the cylinder head off and looking at it I can't tell if there's any squish band at all but there's still enough clearance to still sand the cylinder down a millimeter for more compression anyways.
I start looking at the cylinder and piston for any wear and I see this wide but shallow streak on the piston and cylinder on the exhaust side. Not sure if it's a cause for concern but I don't think it looks good. Obviously, there's also a lot of carbon buildup on the piston and cylinder head which is probably from my engine always running too rich until recently and the fact I accidentally ran 8:1 fuel/oil mix for the first 40 miles I have ridden this engine.
So what I'm asking is: 1) Is there a squish band at all? 2) Should I still go ahead with sanding a millimeter off the cylinder? 3) Is that streak on the exhaust side of things a cause for concern? 4) What should I do about cleaning that carbon buildup?
Any comments about what you guys think the condition of this engine so far is also appreciated. This engine currently has 500 miles on it. The shiny particles in the cylinder is from paper towel cleaning not metal.