My motor just started racing the other day. I'm super upset about it. 
I swung by my buddies house to use his compression tester, and lo and behold - a whopping 80 PSI. So I'm thinking, bad rings, blown head gasket and got them on order (taking all my cash till payday). I dropped a teaspoon of marvel into it to be sure and that got me a few cycles of compression, so it's leaking like a stuck pig, though I don't know if it's crank seal, bottom gasket, head gasket or rings.
I popped the top to take a look and things are looking really good for being ran hard for almost a couple years. There's some scoring on the wall in a couple places, not too severe, but really anything is severe. It will need to be polished up nice and bright, but that's easy enough.
Buddy mentioned to me that I should crosshatch the cylinder, but I don't know how well this all aluminum block will take that.
I'm going to have to WD test it tonight or tomorrow, probably tomorrow.
Though, once I realized it could be a crank seal, I decided that I'm just going to order a new motor - though GasBike and KingsMotorBikes are the only places I saw that sell em. So, it's about the same price to get a top end and bottom end from Bicycle-Engines.com, maybe even cheaper.
So, with that coming in a few weeks, I'm transportationless.
I will be ordering a full top end rebuild kit for it on pay day as well, and my current motor will get worked on. i plan to port it and polish it, replace every gasket on the thing, clean it top to bottom. Then I'll have a good backup ride, and maybe even convince my girlfriend to start riding, as all the parts I've got is about 20 bucks away from being a complete kit.
I swung by my buddies house to use his compression tester, and lo and behold - a whopping 80 PSI. So I'm thinking, bad rings, blown head gasket and got them on order (taking all my cash till payday). I dropped a teaspoon of marvel into it to be sure and that got me a few cycles of compression, so it's leaking like a stuck pig, though I don't know if it's crank seal, bottom gasket, head gasket or rings.
I popped the top to take a look and things are looking really good for being ran hard for almost a couple years. There's some scoring on the wall in a couple places, not too severe, but really anything is severe. It will need to be polished up nice and bright, but that's easy enough.
Buddy mentioned to me that I should crosshatch the cylinder, but I don't know how well this all aluminum block will take that.
I'm going to have to WD test it tonight or tomorrow, probably tomorrow.
Though, once I realized it could be a crank seal, I decided that I'm just going to order a new motor - though GasBike and KingsMotorBikes are the only places I saw that sell em. So, it's about the same price to get a top end and bottom end from Bicycle-Engines.com, maybe even cheaper.
So, with that coming in a few weeks, I'm transportationless.
I will be ordering a full top end rebuild kit for it on pay day as well, and my current motor will get worked on. i plan to port it and polish it, replace every gasket on the thing, clean it top to bottom. Then I'll have a good backup ride, and maybe even convince my girlfriend to start riding, as all the parts I've got is about 20 bucks away from being a complete kit.
