I have a mild blue clone I have done a decent amount of work to. On the most recent build (this week) I file fit the rings and clocked them correctly and installed them into a honed cylinder with good crosshatch. After assembly the motor was run and allowed to reach full operation temperature. I then rode the bike under decent throttle openings to load the rings. I did not have excessive rpm or heat involved in these runs. Progressively the engine would smoke worse only under throttle application. The head and head gasket were both brand new so I believe the oil is coming from the bottom end. My thinking is that I have too much crankcase pressure and this is causing the blowby. I am curious if this sounds like a reasonable problem and if I should try to vent the crankcase. Any help is greatly appreciated.
Blowby after second rebuild
- Thread starter MDDoodleBeast
- Start date
- Tags blowby rebuild
11:1, dyno mod 2 cam, 14cc clone head. Not that I necessarily believe that is the issue I am just at a loss of ideas as to what could be causing it. It's frustrating because I love the bike and have had a blast building it but when you turn around and it looks like a two stroke I just want to par kit lol :doah::shrug:
I'm tempted to go ahead and just buy a new block. The piston I have is a standard t3 honda flat top, so would this be the corresponding block I need?Block, GX200 : Aftermarket Replacement (Chinese). Also, is there a limit to the number of times the arc rod bolts can be torqued and undone? The reason I am asking is the second time through it seemed to take a few more turns to reach 190 inch pounds.
Correct block on the link. But before you give up on that block..I would check it to be sure. And those rod bolts are like the car rod bolts..they are torque to yield style bolts. They slightly stretch every time you re-use them. So I wouldn't go past the 3rd time but some may say different. According to most you are suppose to check them and re-torque them after every major race event or amount of time on the motor.
you are the second person having this issue and i said it before and i will say it again !! a clone is not a honda !!! the bore is different . you can not just drop a honda piston and rings in a clone . other person had the same issue with blow by bet if you put the stock piston back it would go away . or you can buy a wiseco drop in kit suited for your motor .