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  #11  
Old 01-07-2017, 09:57 PM
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Agreen Agreen is offline
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Default Re: Im back at it 4 years later

A 49cc sticker would be better suited on a 79cc 4 stroke HF engine.

And doesn't California have better laws regarding motorized bikes than most states?
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  #12  
Old 01-07-2017, 10:22 PM
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ultralight01 ultralight01 is offline
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Default Re: Im back at it 4 years later

Easier. You pay $20 and that's it. You get a plate and more respect on the road.
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  #13  
Old 01-08-2017, 06:56 AM
curtisfox curtisfox is offline
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Default Re: Im back at it 4 years later

Quote:
Originally Posted by Agreen View Post
A 49cc sticker would be better suited on a 79cc 4 stroke HF engine.

And doesn't California have better laws regarding motorized bikes than most states?
Thoughts so to, up to 4 hp. where others are only 2 hp..........Curt
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  #14  
Old 01-08-2017, 10:34 AM
KCvale KCvale is offline
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Default Re: Im back at it 4 years later

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Originally Posted by SoldierBoy View Post
50cc but I need to get more torque out of the motor without boring it out .I have a 50 degree slope about 1/2 mile long driveway I need to go up I'm 220 pounds lol I don't think my fat butt can even peddle up the hill if I wanted to
Piece of cake to get torque and speed from a ~50cc gas engine, use the bikes gears!



Not only will it power you up the hill with ease, it will be able to stop you coming back down.

~$1500.
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  #15  
Old 01-08-2017, 10:47 AM
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Agreen Agreen is offline
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Default Re: Im back at it 4 years later

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Originally Posted by KCvale View Post
Piece of cake to get torque and speed from a ~50cc gas engine, use the bikes gears!

Not only will it power you up the hill with ease, it will be able to stop you coming back down.
That works too. A little more expensive, but it works! And it's a 4 stroke, which I always prefer.
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  #16  
Old 01-08-2017, 11:13 AM
KCvale KCvale is offline
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Default Re: Im back at it 4 years later

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Originally Posted by Agreen View Post
That works too. A little more expensive, but it works! And it's a 4 stroke, which I always prefer.
Ya, that configuration is really nice ;-}
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  #17  
Old 01-08-2017, 11:46 AM
crassius crassius is offline
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Default Re: Im back at it 4 years later

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Originally Posted by SoldierBoy View Post
How do you find a 40 stroke motor
I get PK80 from the company that has this site: http://shop.umotobikes.com/products/...ycle-motor-kit
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  #18  
Old 01-08-2017, 09:08 PM
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sbest sbest is offline
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Default Re: Im back at it 4 years later

Lets get serious here.
You need a bike to get a 220 lbs rider up a very steep hill?
KC Vale's 4 stroke with a jackshaft kit will do it. Is the price in your range?

If you are on a budget, the 2 strokes are cheap, light and powerful, but easy to blow up if you are careless. So how do you get a 48cc 2 stroke up that hill without a jackshaft kit?

1) Gearing. Put a 56 tooth sprocket on the back, will limit top speed but give ownership of the hills.
2) Port matching of the exhaust. Simply drill the exhaust flange and gasket 3/4".
3) Jetting. Buy a set of 69-62 jets and experiment with them VERY CAREFULLY.
4) Set your squish gap at 0.020"-0.030" using lead solder to measure.
Ideally, remove the head and sand it and the cylinder flat using 180 sandpaper on glass.
Remove the headgasket and use teflon tape to seal the head to the cylinder.
Shim the cylinder up with extra basegaskets to get the proper squish measurement.
5) Shimming the cylinder up will give a port timing improvement.

This will get your butt up that big hill with very little pedalling, I know for a fact.
I have a 48cc working to this formula right now.

Steve
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