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| | | | | Motorized Bicycle General Discussion Topics on bicycle engine kits, help articles, repair and modifications for your motorized bicycles | Anyone have any suggesstions on increasing low end torque? Help me out. Discussion at Motorized Bicycle Engine Kit Forum in the Motorized Bicycle General Discussion forum. Does anyone have any suggesstions on increasing low end torque? I have a 34t sprocket, and kinda want to up ...  | | 
08-15-2008, 12:26 AM
| | Motorized Bicycle Apprentice | | Join Date: Aug 2008
Posts: 11
| | Anyone have any suggesstions on increasing low end torque? Help me out. Does anyone have any suggesstions on increasing low end torque? I have a 34t sprocket, and kinda want to up my Acceleration a bit. However, I dont want to damage the engine, or sacrifice high end torque. I had a few in mind, Getting the Deluxe NSC Carburetor Kit from Deluxe NSC Carburetor Kit - $49.99 , and getting a Boost Bottle. I did read a littlebit on this website, and heard cutting the exaust, etc. but I heard its not that big of a difference. Also forgot to mention my setup is really light, im light, my bike w/ engine is like 50-60lbs, and im like 135. Does anyone have any suggestions? I dont mind slight modifications, I really do wanna up my acceleration, but not sacrifice my top speed, Sofar I got up to 36 mph, and felt like I could go more but didnt, I was only on my 2nd tank, however, my engine really begins to move, and pick up NICE! after about 18mph. So anything you guys have in mind? | 
08-15-2008, 01:16 AM
|  | Motorized Bicycle Builder | | Join Date: Aug 2008
Posts: 28
| | Re: Anyone have any suggesstions on increasing low end torque? Help me out. pedal forest, pedal. seriously, you are probably needing a jackshaft or something cause you can't have it all unless you can change your gear inches.
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08-15-2008, 07:27 AM
|  | MODERATOR | | Join Date: Jan 2008 Location: Ashtabula county, Ohio
Posts: 4,060
| | Re: Anyone have any suggesstions on increasing low end torque? Help me out. Unless that carb has a mixture screw on it in addtion to the idle speed screw, I'd pass. You can get a K&N or other filter for a lot less than 50 dollars!
Don't waste money on a boost bottle, they are proven to be a scam, or imagined performance booster at best.
You can; optimize your mixture, match your ports to the intake and exhaust, lap your head, remove one of the base gaskets if your bicycle motor came with two installed, cut/drill, or remove your baffle, open up your air filter cover, and balance your wheels.
Also, after break-in, your bike will be smoother and faster.
__________________ If it ain't broke, and you mess with it long enough, it will be.
Last edited by Bikeguy Joe : 08-15-2008 at 07:32 AM.
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08-15-2008, 10:27 AM
|  | Master Motorized Bicycle Builder | | Join Date: Mar 2008 Location: Treasure Coast, Florida
Posts: 557
| | Re: Anyone have any suggesstions on increasing low end torque? Help me out. I agree with BGJ, dont waste your money on a boost bottle. Take the same money and buy an expansion chamber, tons of low end torque if you run a long header as I did. | 
08-15-2008, 10:34 AM
| | Master Motorized Bicycle Builder | | Join Date: Jul 2008 Location: Northglenn,Colorado
Posts: 264
| | Re: Anyone have any suggesstions on increasing low end torque? Help me out. The boost bottle on mine made my engine run smooth especially in the bottom end but it did nothing as far as performance so it's not really a performance mod.
You say it really starts to pull up top. That power band if it happens sooner would make it feel like it's pulling stronger would it?
Here's what I recommend. Either get a 40 tooth so you'll get better bottom end but yes you will lose top end OR get Ghost0's shifter kit.
__________________ You have found the fountain of youth. Ride and forever stay young. | 
08-15-2008, 10:48 AM
|  | Master Motorized Bicycle Builder | | Join Date: Jan 2008 Location: Nor*Cal
Posts: 689
| | Re: Anyone have any suggesstions on increasing low end torque? Help me out. Quote:
Originally Posted by misteright1_99 I agree with BGJ, dont waste your money on a boost bottle. Take the same money and buy an expansion chamber. | I couldn't say it any better. I fell into the hype of the boost bottle and IMO didn't do anything for me. Actually here's my Testimonial:
The wonderful guys I ride with pulled a joke on me a while back. Before we went on a ride, one of my buddies put a ball bearing in my bottle line. Half way thru the ride while ranting and raving how well the bottle worked. They started busting up and told me I had something in my line. I pulled out the ball bearing and the bike ran exactly the same and of course I was the joke of the day! 
The only reason I kept it on was I didn't want to buy another manifold. | 
08-15-2008, 10:57 AM
| | Motorized Bicycle Apprentice | | Join Date: Aug 2008
Posts: 11
| | Re: Anyone have any suggesstions on increasing low end torque? Help me out. Quote:
Originally Posted by misteright1_99 I agree with BGJ, dont waste your money on a boost bottle. Take the same money and buy an expansion chamber, tons of low end torque if you run a long header as I did. | Im kind of new to this but I still have alot of prior knowledge, where can I buy an expansion chamber, and what is it? | 
08-15-2008, 11:08 AM
| | Motorized Bicycle Apprentice | | Join Date: Aug 2008
Posts: 11
| | Re: Anyone have any suggesstions on increasing low end torque? Help me out. So how about the intake system I mentionedd above? Deluxe NSC Carburetor Kit - $49.99
In addition where can I get a performance Exaust pipe?  | 
08-15-2008, 11:09 AM
|  | Master Motorized Bicycle Builder | | Join Date: Jun 2008 Location: Longmont, CO
Posts: 920
| | Re: Anyone have any suggesstions on increasing low end torque? Help me out. Expansion Chamber
An expansion chamber will probably be the best bang for the buck power-wise. I still need to get one.. | 
08-15-2008, 11:18 AM
|  | Master Motorized Bicycle Builder | | Join Date: Jan 2008 Location: Nor*Cal
Posts: 689
| | Re: Anyone have any suggesstions on increasing low end torque? Help me out. New SCSW Tuned Pipes for sale!
Here's the Pipelyne pipe. It will fit without doing any modifications. The pipe comes with a heatshield. | | Thread Tools | | | | Display Modes | Linear Mode |
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