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| High Performance Bicycle Engine Tips We all want our bicycle engines to push our bikes faster. Get exclusive engine modification tips and suggestions from us. |
Ok, had dremel and we'll see how much damage I did.
Discussion at Motorized Bicycle Engine Kit Forum in the High Performance Bicycle Engine Tips forum. Last night I decided to match the ports on my bike. I sat down, and carefully opened up the poo ...  | | 
08-17-2008, 02:01 PM
|  | Master Motorized Bicycle Builder | | Join Date: Jun 2008 Location: Independence MO
Posts: 271
| |  Ok, had dremel and we'll see how much damage I did.
Last night I decided to match the ports on my bike. I sat down, and carefully opened up the poo poo pipes flange to match the exhaust on the cylinder. Looks really good ok, then I glued the new exhaust gasket and after it dried, i reamed it out too with the dremel.
I did the same as much as possible with the intake. So this afternoon, the first test drive. I'll let you know if it was worth it.
__________________ _________________________________________________ It's a mathematical fact, 10 out of 8 people have trouble with fractions. Kings 70cc 3200+ miles. Now on a Schwinn Point Beach. (And say HI to my Dad, he works there in the Archives!) |
08-17-2008, 02:31 PM
|  | Moderator | | Join Date: Mar 2008 Location: Tucson,Arizona
Posts: 2,600
| | Re: Ok, had dremel and we'll see how much damage I did.
Keep us posted   |
08-17-2008, 04:22 PM
| | Master Motorized Bicycle Builder | | Join Date: Jun 2008 Location: Independence MO
Posts: 271
| | Re: Ok, had dremel and we'll see how much damage I did.
Ok, well it seems to have a bit more power on the hills, but now it's running to rich as I can smell fuel. Runs a bit better choked up. So my thinking is I need to adjust the carb clip again?
__________________ _________________________________________________ It's a mathematical fact, 10 out of 8 people have trouble with fractions. Kings 70cc 3200+ miles. Now on a Schwinn Point Beach. (And say HI to my Dad, he works there in the Archives!) |
08-17-2008, 04:31 PM
|  | Manufacturer/Dealer | | Join Date: Dec 2007 Location: Charlottesville, VA
Posts: 339
| | Re: Ok, had dremel and we'll see how much damage I did.
Hmmmm...If the engine is running better with the choke up....that means it is running too lean (rather than rich).....be careful not to fry the engine by running it too hard in a lean condition....
Good luck
Andrew
PS - Have to lower the clip (raises the needle) to richen it up... |
08-17-2008, 04:40 PM
| | Master Motorized Bicycle Builder | | Join Date: Jun 2008 Location: Independence MO
Posts: 271
| | Re: Ok, had dremel and we'll see how much damage I did.
Quote:
Originally Posted by Andyinchville1  Hmmmm...If the engine is running better with the choke up....that means it is running too lean (rather than rich).....be careful not to fry the engine by running it too hard in a lean condition....
Good luck
Andrew
PS - Have to lower the clip (raises the needle) to richen it up... | Well it's confusing. It's much cooler today than when I was running the bike before I did the dremeling... It's been a hot humid summer, and it was running better before. So the settings were for the hot weather. Also noticed fuel all over the carb. This is weird.
__________________ _________________________________________________ It's a mathematical fact, 10 out of 8 people have trouble with fractions. Kings 70cc 3200+ miles. Now on a Schwinn Point Beach. (And say HI to my Dad, he works there in the Archives!) |
08-17-2008, 05:31 PM
| | Master Motorized Bicycle Builder | | Join Date: Jun 2008 Location: Independence MO
Posts: 271
| | Re: Ok, had dremel and we'll see how much damage I did.
Ok... update. Pulled the cable and sleeve out of the carb and it was on the lowest notch. So I put it on the second from the top. Seemed to run much better with the choke on just a touch. I'll move it to the second lowest notch and see what happens. I do run a bit heavy on the oil side. I guess opening these ports, opened a can of worms too. However, it does really pull on the hills. I've noticed since doing this work, and replacing the gaskets it doesn't seem to have the crackle as much.
Any opinions at this point are very welcomed!
__________________ _________________________________________________ It's a mathematical fact, 10 out of 8 people have trouble with fractions. Kings 70cc 3200+ miles. Now on a Schwinn Point Beach. (And say HI to my Dad, he works there in the Archives!) |
08-17-2008, 06:40 PM
|  | Master Motorized Bicycle Builder | | Join Date: Dec 2007 Location: Essex, UK
Posts: 291
| | Re: Ok, had dremel and we'll see how much damage I did.
Quote:
Originally Posted by Motoschwinn Ok... update. Pulled the cable and sleeve out of the carb and it was on the lowest notch. So I put it on the second from the top. Seemed to run much better with the choke on just a touch. I'll move it to the second lowest notch and see what happens. I do run a bit heavy on the oil side. I guess opening these ports, opened a can of worms too. However, it does really pull on the hills. I've noticed since doing this work, and replacing the gaskets it doesn't seem to have the crackle as much.
Any opinions at this point are very welcomed! | The more the ports are matched and blueprinted - the more they are free flowing... if you dont have a tuned pipe on there then the more fuel/oil per stroke is escaping.. hence the richer you have to run the motor.. but the more power you will get because the scavenging in the engine is better.
If I am right - the crackle might have been whats called 'four-stroking' but not having heard it in the wild I am not sure..
Jemma xx
__________________ "....Look, no pedals... *thud*..." The mating call of the motorized-biker. "RetroEagle" - 32cc Two-Stroke, Piped. 35mph on #13 gear. Reversed stem with springer fork. |
08-17-2008, 07:18 PM
| | Master Motorized Bicycle Builder | | Join Date: Jun 2008 Location: Independence MO
Posts: 271
| | Re: Ok, had dremel and we'll see how much damage I did.
I think I'll install the original manifold and see what happens...
__________________ _________________________________________________ It's a mathematical fact, 10 out of 8 people have trouble with fractions. Kings 70cc 3200+ miles. Now on a Schwinn Point Beach. (And say HI to my Dad, he works there in the Archives!) |
08-18-2008, 07:17 AM
|  | MODERATOR | | Join Date: Jan 2008 Location: Ashtabula county, Ohio
Posts: 4,245
| | Re: Ok, had dremel and we'll see how much damage I did.
Hold on...you can't chase down a problem, you have to diagnose it.
What color is your plug, regardless of "C" clip settings? Black- too rich. tan/brown- good. Grey or white+ death to the engine.
Leave the pipe on and get the mix right. You'll be happy when it's all sorted.
__________________
If it ain't broke, and you mess with it long enough, it will be. |
08-18-2008, 08:14 AM
| | Master Motorized Bicycle Builder | | Join Date: Jun 2008 Location: Independence MO
Posts: 271
| | Re: Ok, had dremel and we'll see how much damage I did.
Quote:
Originally Posted by Bikeguy Joe Hold on...you can't chase down a problem, you have to diagnose it.
What color is your plug, regardless of "C" clip settings? Black- too rich. tan/brown- good. Grey or white+ death to the engine.
Leave the pipe on and get the mix right. You'll be happy when it's all sorted. | Ok, the plug is brown to dark brown. Only runs right with the choke is just slighty on. I pulled the aircleaner off, and visually I would say the choke is about 15% on.
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