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Shifting???
Discussion at Motorized Bicycle Engine Kit Forum in the Motorized Bicycle General Discussion forum. Hi, I have a stock 44t rear sprocket which maxes out on the road pretty quick. So...I mounted a 24t ...  | | 
11-20-2009, 06:56 PM
|  | Motorized Bicycle Newbie | | Join Date: Nov 2009 Location: Hope Valley
Posts: 13
| |  Shifting???
Hi, I have a stock 44t rear sprocket which maxes out on the road pretty quick. So...I mounted a 24t right next to it. The engine doesnt have enough power to start going in this gear, so I was wodering...
Does anyone know of a good way of shifting gears? (Please not the 250 dollar shift kit!)
Homemade designs are sweet if you have one!!!
Thanks |
11-20-2009, 07:37 PM
|  | Motorized Bicycle Elite Member | | Join Date: Mar 2008 Location: Bellingham, WA
Posts: 638
| | Re: Shifting???
The standard kit is only $180, but I hear what you are saying. My initial attempt at a shift kit was to use a derailleur on the left side to try to make a three speed. Didn't work out very well because when you try and bump start the engine the derailleur would unwind, loosen your chain and it would fall off. I am sure others will have some ideas for you though. |
11-20-2009, 08:37 PM
|  | MANIC Mechanic | | Join Date: Sep 2008 Location: Clearwater, FL
Posts: 1,290
| | Re: Shifting???
Quote:
Originally Posted by Bikewithamotor  Hi, I have a stock 44t rear sprocket which maxes out on the road pretty quick. So...I mounted a 24t right next to it. The engine doesnt have enough power to start going in this gear, so I was wodering...
Does anyone know of a good way of shifting gears? (Please not the 250 dollar shift kit!)
Homemade designs are sweet if you have one!!!
Thanks | I would like to see your set-up with the 24T mounted right next to the 44T. Do you have pics?
Jim |
11-20-2009, 08:45 PM
| | Motorized Bicycle Elite Member | | Join Date: Aug 2009 Location: pa
Posts: 428
| | Re: Shifting???
Search google for "Jackshaft / Shiftkit / Freewheel"
I have a thread out there that might give you some ideas.
It's not completed totally.
Someday i'll finish it.
I don't know about cheaper though. |
11-20-2009, 10:02 PM
|  | Motorized Bicycle Elite Member | | Join Date: May 2008 Location: PENSACOLA, FL
Posts: 1,348
| | Re: Shifting???
A Sbp Shift Kit Or A Cvt Belt Box Is The Best Thing You Can Do For Any Motor. I Weight 0ver 300 And My Titan 49cc With Shifter (sbp Shifter Pieces) Amaze`s Me Every Time I Ride. Motor Developes Awsum Torque With Out A Lot Of Rpm`s. If You Could Test Ride A Shifter Bike, That Would Be It!! A Shifter Build Is Better Than Any Mods. Ron
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NEVER BEAT ON IT, GET A BIGGER HAMMER  |
11-20-2009, 10:39 PM
|  | Master Bike Builder & Forum Sponsor | | Join Date: Dec 2007 Location: Duvall, WA PNW
Posts: 2,847
| | Re: Shifting???
You could wait for our dead of winter sale!   |
11-21-2009, 04:03 AM
|  | Moderator | | Join Date: Jul 2009 Location: Maine
Posts: 2,182
| | Re: Shifting???
Quote:
Originally Posted by Pablo You could wait for our dead of winter sale! | orly? o.O
oops Pablo - you may have just postponed a purchase lol
Bikewithamotor - not to dissuade any DIYers, but after a buncha research I've found the SBP's shift kit isn't as expensive as it seems - when you add up all the costs of the various parts (the freewheel sprocket on the crank being one of the biggest) and all the effort in R&D... it's actually quite reasonable and you know it'll perform.
Last edited by BarelyAWake : 11-21-2009 at 04:07 AM.
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11-21-2009, 06:45 AM
| | Master Bike Builder & Forum Sponsor | | Join Date: Dec 2007 Location: Duvall, WA PNW
Posts: 2,847
| | Re: Shifting???
Late Dec-Jan time frame... |
11-21-2009, 09:58 AM
| | Motorized Bicycle Elite Member | | Join Date: Aug 2009 Location: pa
Posts: 428
| | Re: Shifting???
Pablo
That's great news.
I'm on a limited budget till after christmas. |
11-21-2009, 01:50 PM
|  | Godfather of Motorized Bicycles | | Join Date: Jan 2008 Location: Ashtabula county, Ohio
Posts: 7,898
| | Re: Shifting???
I don't think the stock engine will pull a 24T on a 26" bike anyway.
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