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| Motorized Bicycle General Discussion Topics on bicycle engine kits, help articles, repair and modifications for your motorized bicycles |
Big mistake
Discussion at Motorized Bicycle Engine Kit Forum in the Motorized Bicycle General Discussion forum. I ordered one of those 49cc chinese kits off ebay. I didn't put much thought into the frame size ...  | | 
10-14-2008, 12:31 AM
| | Motorized Bicycle Member | | Join Date: Oct 2008 Location: Harrisonburg, VA
Posts: 42
| |  Big mistake
I ordered one of those 49cc chinese kits off ebay. I didn't put much thought into the frame size until about ten minutes ago.
My motor will arrive sometime tomorrow but I just looked at the frame size on my mountain bike and it's a 17in. Am I going to run into some serious mounting problems? |
10-14-2008, 12:48 AM
| | Motorized Bicycle Senior Member | | Join Date: Aug 2008 Location: High Plains Desert, Roy UT
Posts: 89
| |  Re: Big mistake
It should fit real snugly.............there are ways to adapt any engine to a bike.......maybe a frame from the local thrift store is in need of customizing?  |
10-14-2008, 12:50 AM
|  | Moderator | | Join Date: Mar 2008 Location: Cuk Ṣon, AZ
Posts: 4,724
| | Re: Big mistake
Link... What kind of bike would you recommend?
At least 12.5 inches running along the seat tube from the top of the bottom bracket to the bottom of the top tube.Tubing size from 1-1.5inches on the both the seat and down tube. Plus or minus 70deg. above the bottom bracket between the down tube and the seat tube. Inner distance between pedals needs to be greater than 4.5 inches in width to clear the 4.5inch wide motor. |
10-14-2008, 01:14 AM
| | Motorized Bicycle Member | | Join Date: Oct 2008 Location: Harrisonburg, VA
Posts: 42
| | Re: Big mistake
Quote:
Originally Posted by LordMaximo  It should fit real snugly.............there are ways to adapt any engine to a bike.......maybe a frame from the local thrift store is in need of customizing? | That's good news, if all goes well I'll find out soon enough. I don't mind hitting up home depot and grabbing whatever I need to make a mount, I'm mostly concerned about it fitting in the frame (since I have no idea what to expect seeing as how I've never seen one of these motors before) |
10-14-2008, 07:24 AM
|  | Motorized Bicycle Senior Member | | Join Date: Aug 2008
Posts: 58
| | Re: Big mistake
yup but its doable just way more time consuming im on the same page but mines 3/4 built working out some minor clearance situations with carb reed setup |
10-14-2008, 10:51 AM
| | Motorized Bicycle Member | | Join Date: Oct 2008 Location: Harrisonburg, VA
Posts: 42
| | Re: Big mistake
Quote:
Originally Posted by fairracing31 Link... What kind of bike would you recommend?
At least 12.5 inches running along the seat tube from the top of the bottom bracket to the bottom of the top tube.Tubing size from 1-1.5inches on the both the seat and down tube. Plus or minus 70deg. above the bottom bracket between the down tube and the seat tube. Inner distance between pedals needs to be greater than 4.5 inches in width to clear the 4.5inch wide motor. | I just did a quick check, I have exactly 12'' along the seat tube from bottom tube to top tube. I'm guessing I'm going to run into problems with the carburetor. Any ideas? |
10-14-2008, 12:10 PM
|  | minor bike philosopher | | Join Date: Jan 2008 Location: north carolina
Posts: 5,428
| | Re: Big mistake
Wait till it comes before you build it... seriously no sense agonizing just yet... |
10-14-2008, 02:57 PM
|  | Motorized Bicycle Member | | Join Date: Feb 2008
Posts: 44
| | Re: Big mistake
Quote:
Originally Posted by cartisdm I ordered one of those 49cc chinese kits off ebay. I didn't put much thought into the frame size until about ten minutes ago.
My motor will arrive sometime tomorrow but I just looked at the frame size on my mountain bike and it's a 17in. Am I going to run into some serious mounting problems? | i ran into a lil problem with my 19inch frame with the chain being to loose so i up grading to a bigger old skool frame like those ppl used to ride on in the tour de france.Yea the ones with skinny wheels. |
10-14-2008, 03:04 PM
| | Motorized Bicycle Senior Member | | Join Date: Aug 2008
Posts: 58
| | Re: Big mistake
like deacon said get it then the ideas may arise possibly adapt a 90 to it stick it out the side a littlebit still i would wait you will have a clearer picture PEACE !!!! |
10-14-2008, 03:55 PM
| | Moderator | | Join Date: Mar 2008 Location: Cuk Ṣon, AZ
Posts: 4,724
| | Re: Big mistake
Quote:
Originally Posted by cartisdm I just did a quick check, I have exactly 12'' along the seat tube from bottom tube to top tube. I'm guessing I'm going to run into problems with the carburetor. Any ideas? | I've got 14" with less then a inch of clearence...I think that will be a very tight fit. | | Thread Tools | | | | Display Modes |  Linear Mode | 
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