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Discussion in 'Battle Scooters' started by sro99, Aug 6, 2019.
Still waiting for my piston, rings, gaskets, exhaust studs and water pump kit. Should be here on Monday, I hope.
Bearings Canada delivered the 6303-2RS (17x47x14) Sealed Ball Bearing I ordered. Heated the swingarm and old bearing with a propane torch and hammered out the old bearing. Used it on the backside of the swingarm with some threaded rod and some nuts and washers to press the new bearing in. It took a lot of force with a 18 inch ratchet to get the little sucker in there. Spins smooth!
Manual says to measure the outside diameter of the piston perpendicular to the gudgeon pin axis. Take the measurement at 5 mm from the base of piston. Diameter should meassure 71.953 - 71.981 mm.
Mine measured 71.93 mm. Glad I ordered a new piston for $40!
No bike to ride, no parts to install so I get to tinker.
Measured the ring end gap of the top compression ring. Measured .41mm. Max spec is .3mm. Minimum is .15mm
Middle piston ring measured .46mm. Max spec is .4mm. Minimum is .2mm
Scraper ring Standard opening: 0.20 - 0.40mm. Didn't measure mine.
Ring end gap was the same measured at top, bottom and middle of cylinder.
Glad I ordered a piston and rings and didn't just fix the broken exhaust stud and put it back together!
reality is, if you'd have drilled and welded the stud outta there while in the bike, it would run that way for another 20k miles.
You're right but... It would of used a lot of oil over 20k miles.
It was burning about 250ml every 1000km. Waiting for a traffic light was a little stinky. Might have to change the muffler after 20k miles from getting clogged?
I was unaware of the oil consumption.
my friends truck was bought back for burning 32oz of oil in 200 miles.
Now that's excessive! Fill up the oil and check the gas please.
imagine drinkin that much whiskey in 200 miles, be HAMMERED
I soaked the exhaust port of the head with kerosene to try and clean out some of the burnt on oil. Didn't seem to help much. Thought about using Seafoam or maybe gas would have been better? Would like to do the same thing with the header pipe but afraid to damage the O2 sensor.
If you really wanna clean out the exhaust...... remove the O2 sensor and fire up the bbq, burn that fucker out.
O2 sensor looks angry. Probably never been undone and 10 years old. Think I'll just leave it be so I don't break something.
A glimpse of the inside of the exhaust port before cleaning. Kinda gooey in there. Header isn't nearly as bad.
Mix acetone and ATF soak it
Don't own either of those. I have gasoline, diesel, kerosene, Seafoam, Coke, vinegar, whiskey, 99% isopropyl, Dawn.... Wait... What was that last one? Dawn? No, the one before that. 99% isopropyl? Yeah! Use that for gooey burnt oil!
Kerosene would work too if ya soak it.
gasoline, diesel, kerosene, isopropyl, transmission fluid, wd40, liquid wrench, it’ll all break it up.
Just realized you were saying to use acetone and ATF (panther pee) to get the O2 sensor undone not for the gooey exhaust port. I did a 30 minute kerosene soak and used an old toothbrush and it didn't help much, maybe a little. Longer soak with kerosene or try 99% isopropyl?
I clean filthy gas tanks with the E85 "gas" you can buy around here at a few stations. If it's available near you it's a pretty good solvent and cheap.
Don't think I've ever seen E85 around here although my 2013 van was designed for it. I would think that ethanol and isopropyl alcohol would be good degreasers.
i use ATF as a crud buster a lot when cleaning piston tops inside old car blocks etc etc
i don't have an answer for your O2 sensor, they suck. there is a special socket and you can brap em out with an impact gun, but its hard to hold the exhaust and do that.
ATF as a crud buster, I would of never thought of that! Thought it was just a good lubricant.
Pics I posted a couple pages back really shows the gooey burnt oil.
Six o'clock on the edge of the piston shows the gooeyness well with the light reflecting off of it.