My winter project is my 2005 Honda Metropolitan. I bought it new when I was 16 and had loads of fun on it. I have over 10k miles on it and it needs some work.
Due to the crank bearing issue and its age, I an going to be doing a complete rebuild. There's a compression issue that needs solving, but I suspect a bad head gasket.
Thanks to HappyPancake! I now am in possession of the 58cc big bore piston! My preliminary parts list is as follows so far (I'm 100% open to suggestions/ recommendations): 58cc BBK DCR cam P20 carb (any thoughts/notes here?) NCY CDI/new ignition coil/Ir spark Intake box delete and new intake NCY golden variator (or should I go Polini?) New/shaved drive face (any notes here?)
I'm not sure what to do for exhaust or clutch at the moment.
Teardown and cleaning is first up. Photos and updates to follow!
Last Edit: Nov 4, 2019 21:59:23 GMT -5 by dankhill: Add photos
No issue yet. Just preventative maintenance while I have the little guy fully torn apart. My buddy is rebuilding his Metro with me/at the same time/in the same basement has a blown crank bearing FOR SURE. His is sitting at 16k miles...His ped sounds like about 1,000 marbles let loose in the crank. It's definitely not his variator. We checked that to eliminate the low hanging fruit (of things that sound like marbles in a centrifuge).
I changed my oil religiously after the first 1k miles (when the issue was well known in early-mid 2006). I am/was changing every season/500mi whichever came up first after the first year.
This is the 02-05 GET that doesn't have the intake breather. It has the intake/exhaust breather that recycles exhaust gasses in the cylinder (I believe) and prematurely fouls the oil. Without regular oil changes this grenades the crank bearing. (sorry if you knew this already, but I figured I'd explain for the benefit of others).
Last Edit: Nov 5, 2019 15:24:36 GMT -5 by dankhill
"Early ruckus pre-06 had a primitive pcv system that required long drives to get the oil hot enough to vapor the blow by gases and then have them burn in the combustion chamber, sadly short trips did not got the oil hot enough, so the gas in the blow by gases diluted the oil damaging the main bearings, later ruckus have a better pcv system. So the trick on the early vertions is just to have some long 15 to 30 minutes rides on the weekends to burn the gas in the oil, so this problem is not as common as it used to be"
Eh - it happens. I've owned this since new, and always knew this was going to rear its ugly head at some point. I am just going to eat the $120 for a new crankset and hope that it lasts me another 15 years.