Motorized Bicycle Engine Kit Forum  

Sponsors



Go Back   Motorized Bicycle Engine Kit Forum > Motorized Bicycle > Motorized Bicycle General Discussion

Motorized Bicycle General Discussion All topics regarding bicycles with engines.

Reply
 
Thread Tools Display Modes
  #11  
Old 10-13-2016, 06:48 PM
TheSignGuy TheSignGuy is offline
Motorized Bicycle Elite Member
 
Join Date: Nov 2014
Location: seattle, wa
Posts: 205
Default Re: face palm hp to cc help

Quote:
Originally Posted by Agreen View Post
I've heard terrible things about those CAG engines. I have zero first hand experience with them though, so take it as you will.

Definitely doable. There's a few people who have done it before.

Cag? Define Cag all I know is if it won't throw a shaft I'll put my money where my mouth is I've kept my old derailers as well so I can preset the high and lowes to sit in a stationary position preventing chain from jumping off, it's not so much about power for me just getting around may deck it out just for rain riding. Add an extra wheel set make it a 4 wheeler and weld a small overhead dome stop some of that rain bad part is choppers suck with rain street tires will make you slide all over the place if your not going in a streight line,
__________________
It's NOT what you Can't DO Its About What YOU Can build.
-Harley and Davison.
Reply With Quote
  #12  
Old 10-13-2016, 06:58 PM
Agreen's Avatar
Agreen Agreen is offline
Motorized Bicycle Elite Member
 
Join Date: Feb 2013
Location: Goose Creek, SC
Posts: 683
Default Re: face palm hp to cc help

http://motorbicycling.com/showthread.php?t=47347

Cag is term for pocket bike engines. I'd choose the Stihl as a bike engine over one of those.
__________________
Never stop wrenching
Reply With Quote
  #13  
Old 10-14-2016, 02:50 PM
TheSignGuy TheSignGuy is offline
Motorized Bicycle Elite Member
 
Join Date: Nov 2014
Location: seattle, wa
Posts: 205
Default Re: face palm hp to cc help

Quote:
Originally Posted by Agreen View Post
I've heard terrible things about those CAG engines. I have zero first hand experience with them though, so take it as you will.

Definitely doable. There's a few people who have done it before.


[B]Here is some information I found useful

Engines

We have identified four different types of engines used in the Cagllari (Cag) Pocketbike. They are:

1. SY Engine
2. ZH-1 Engine
3. BD Engine
4. 48cc Engine


The SY, ZH-1, and BD engines, are all basically the same, design-wise, but there are little differences between the engines that I will point out (also, remember that the tolerance factors between the engines are so great, that there may be a few SY engines that perform better than ZH-1, BD, etc, and vice versa).


It has been shown, that the ZH-1 has bigger intake ports (look inside the cag's head, and you will see two ports, one on opposited ends of the head) than the SY head. Bigger ports will give you higher RPM numbers, but the low end will be somewhat decreased due to a larger surface area. Remember, bigger isn't always better. There is a sacrafice. With bigger ports, air/fuel velocity will be decreased, but again, since more air/fuel is introduced, you will reach higher RPMs. Again, since the tolrance levels are not that great with these engines, you will find that some SY engiens will perform better overall than the ZH-1 engines. I'm not familiar with the BD engine, to give a thorough review.

The 48cc engine, compared to a ZH-1, has noticeably bigger intake ports, as well as the piston is bigger. This engine is commonly referred to as having the Big Bore kit. This engine, is definitely faster than any of the stock cag engines. The power is greater at all ranges, low, mid, and high. If you're lucky enough to find one of these engines stock on a cag, congratulations. How can you tell or look for one of these engines on a stock cag? You pretty much can't tell the difference, without taking off the head and measuring the bore and stroke. It's a pretty much hit and miss type of deal.


Stock Performance in mph

The following are approximations:

SY, ZH-1 and BD engines - 30 mph (+/-) at 9500-10,000 RPMs
48cc engine - 33 mph (+/-) at 11000 RPMs

/B]
__________________
It's NOT what you Can't DO Its About What YOU Can build.
-Harley and Davison.
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 09:29 AM.


Sponsors

Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
MotorBicycling.com