Motorized Bicycle Engine Kit Forum  

Sponsors



Go Back   Motorized Bicycle Engine Kit Forum > Bicycle Motor > High Performance Bicycle Engine Tips and Motorized Race Bicycles

High Performance Bicycle Engine Tips and Motorized Race Bicycles We all want our bicycle engines to push our bikes faster. Get exclusive engine modification tips and suggestions from us. Also check out some of our racing members builds


Pocket bike CVT setup

We all want our bicycle engines to push our bikes faster. Get exclusive engine modification tips and suggestions from us. Also check out some of our racing members builds


Reply
 
Thread Tools Display Modes
  #1  
Old 06-26-2011, 11:48 AM
Ballin on a Budget's Avatar
Ballin on a Budget Ballin on a Budget is offline
Motorized Bicycle Senior Member
 
Join Date: May 2011
Location: Vernon, British Columbia
Posts: 86
Thanks: 0
Thanked 0 Times in 0 Posts
Default Pocket bike CVT setup

Hey guys,

So i know that this issue has been adressed before but I could not find a definitive answer even after much searching.

Has anyone attempted to use a high performance pocket bike engine with a CVT setup on their bike? I know the sprocket size/gearing issues that would need to be adressed but any other reasons why this would not work? 4.2 HP w/CVT for under $150 sounds like it could be fun to try any make work. Let me know your input/ideas thatnks!
-Dan
Attached Thumbnails
Click image for larger version

Name:	PB.jpg
Views:	171
Size:	21.0 KB
ID:	37476  
Reply With Quote
  #2  
Old 06-26-2011, 12:41 PM
wayne z's Avatar
wayne z wayne z is offline
Motorized Bicycle Elite Member
 
Join Date: Dec 2010
Location: louisiana
Posts: 1,747
Thanks: 0
Thanked 5 Times in 5 Posts
Default Re: Pocket bike CVT setup

That's not a CVT on that motor. That is the Hoot chainbox, they totaly crap out around 200 miles of service. good motor though.
Reply With Quote
  #3  
Old 06-26-2011, 06:30 PM
Tohri Tohri is offline
Motorized Bicycle Elite Member
 
Join Date: Aug 2010
Location: People's Republik of Massachusetts
Posts: 159
Thanks: 0
Thanked 0 Times in 0 Posts
Default Re: Pocket bike CVT setup

I have the CAG with High compression head and big bore whoozamawhatsit. Didn't like me, ports were NOT chamfered, didn't like to start, BUT besides it being of questionable durability, delivered really exceptional power. And that's before I got in there to really screw with it.

I also had the CVT, but somebody forgot to tighten a bolt on it, so it spun the backplate to the variator, and melted the variator weights. That was a major WTF.

So yeah. What you have there is a chain drive gearbox. The CVT is a thick, stout beast with a plastic cover. Also. be aware that mounting the CVT changes drive direction, so you'll either need a jackshaft or need to mount the motor Backwards (I know, I know) and drive the whole ba$tard from the pedal side. Shift kit mod maybe?
Reply With Quote
  #4  
Old 06-26-2011, 06:41 PM
Ballin on a Budget's Avatar
Ballin on a Budget Ballin on a Budget is offline
Motorized Bicycle Senior Member
 
Join Date: May 2011
Location: Vernon, British Columbia
Posts: 86
Thanks: 0
Thanked 0 Times in 0 Posts
Default Re: Pocket bike CVT setup

Hey sorry ya I was just showing the motor and I know that is not the CVT on offer...

What I saw was someone who used a 49cc honda clone thumper with a cvt on it. Ive never used a CVT or torqe-a-verter (as the comet ones are called) do they all reverse the drive direction ? Seems to me that any that ive seen keep standard rotation. Or is it just the ones for pocket bikes that reverse direction. I dunno just pondering somethin new and I came across the PB motors. I think im gonna replace me HT with a 4 stroke anyways but I still want to get a CVT on my next setup. Any companies out there that you would reccomend??
-Dan
Reply With Quote
  #5  
Old 06-26-2011, 07:39 PM
happyvalley happyvalley is offline
Motorized Bicycle Elite Member
 
Join Date: Jul 2008
Location: upper Pioneer Valley
Posts: 787
Thanks: 3
Thanked 3 Times in 3 Posts
Default Re: Pocket bike CVT setup

I've a project in progress with a R/S engine and pb CVT, waiting for my frame guy to finish some welding.

Click image for larger version

Name:	SAM_0024.jpg
Views:	200
Size:	131.5 KB
ID:	37496Click image for larger version

Name:	SAM_0026.jpg
Views:	216
Size:	129.1 KB
ID:	37495

A very worthwhile thread to read on pb CVTs regardless of how or where you mount the engine is:
http://motorbicycling.com/f36/snake-...cvt-24271.html

Last edited by happyvalley; 06-26-2011 at 07:42 PM.
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 11:41 AM.


Sponsors

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
MotorBicycling.com