You will get more life and a higher top end speed if you take the time to check everything and make sure that all of the ports are clear and clean.
If it's something that doesn't matter to you then just go ahead and slap it together but if you do it's not going to last very long and it's not going to be very fast.
I can't seem to figure out how to send pictures on here but if I could I would show you what I was talking about. There are a ton of videos on YouTube that you should watch before you assemble your engine.
Hang on and I will look up some of the more important videos for you to watch and post the link here in just a few minutes check back tomorrow morning.
There's a general rule when it comes to these motors. The cheaper they are the less attention they pay to them when they put them together. Thats why you will see one motor for $100 and the same motor for a couple hundred.
From upgraded case bolts that won't strip to correctly installed wrist pins on the piston.
I know how daunting this can be but if you pay attention to the small details you will get 45 mph out of your bike like I do.
Just cleaning up the flow ports will give you an extra 5 to 10 miles an hour.
It took me an extra month to go over my bike parts to make sure everything was good to go.
I filed the sharp edges off the rear and front drive sprokets so it doesn't eat the chain. Run your fingers in the sprocket grooves. You can feel the sharp edges from it being pressed out when they made the sprocket. If you file these down it will stop your chain from climbing off of the sproket and save tons of Life on your chain.
I checked the intake and exhaust ports to make sure that they were clean and clear of obstructions and the transfer ports. This allows the bike to breathe and exhale easier which affects your overall performance and speed.
I filed the intake manifold to smooth the inside of it and I filed the flange where the exhaust connects to the motor so as to allow it to flow easier. This will help it run smoother and keep it from overheating.
I greased the case bearings because they rarely do this and it is important so that the bearings do not wear out in your motor.
(Behind the drive sproket in the clutch arm housing and the little gear in the area where the clutch plate is.) Very important!
This might seem like over kill but its relevant to the life of the bike and performance.
To much info? Sorry. I just know how frustrating it is to spend my time building something and have it destroyed by a cheap little fix that I overlooked or skipped. Good luck!
