If this is yumi stuff, I'd expect nothing better.. I would however be suprised that they aren't selling the kit anyway, leaving that problem up to the consumer to figure out
No, that is exactly why they aren't releasing the 180cc kit. Anytime you add mass onto the piston as with a 180cc piston you are putting more stress on the engine and something will eventually give. The stock con rod just isn't strong enough.
The smoking i was getting turned out to be my fault. One of my gas cans had a little diesel in it. I don't normally keep diesel at all and i accidentally put about 1/8 gallon in the tank without realizing it. Since then everything has been flushed and the smoking is gone. I installed the new V2 piston the cam and throttle body and it is running great now.
Trust me I know there has been frustration. I was the first one other than the factory to install their bore kit, probably in the world so i have a lot of money invested in these products. I must admit I was mad, first there were delays which took 3 months to get my parts then the first piston i had the skirt was too long and hit the crank. I then had the spacer on the 31mm intake with holes .5mm too small (not that big of a deal)
Since then these problems every one of them has been addresses, fixed and each kit has been replaced free of charge, all you have to do is ask. I talked to the owner for several hours and I know he cares about selling quality. The difference with Yuminashi is all you have to do if there are problems is either contact him or one of his distributors and they will look into it. Even the takegawa products are not without flaws. People were having problems with the wrist pins in the Takegawa stroker kits as well and some of the gears on the transmissions were breaking on the tak transmissions. Product development and improvement is an ongoing process and will continue to be. Look at a huge company like xbox. They sold millions of these units and there are quite a few that had the red ring of death.
The point is that this company is concerned about improving their products and i am giving them another chance. If you have issues with what you bought let him know so he can make sure the future products are updated.
