john_the_great
New Member
I am actually starting my pocket bike build I have been rambling about all over the forum! I have the cvt on order and should get it later this week, i'm pretty stoked to see how one of these compares to a china girl.
Pocket bike engine + cvt build start
- Thread starter john_the_great
- Start date
diceman2004
New Member
what way are you planning on mounting it , in the frame or on the rack behind the seat ?
john_the_great
New Member
I am going to try making a mount bracket(or buying a 4stroke mount) and mount it in the frame.
diceman2004
New Member
cool , yeah i was just looking at your frame and its got that dirt jumper shape to it . engine,s gonna be sittin pretty high iether way . whats your plan for the tank ?
john_the_great
New Member
I think im gonna use the gas tank that came with my china girl.
captainrichhill
New Member
Keep us posted... I want to do the same but either with a 49-50cc or a 70cc ATV motor that has automatic gears.
john_the_great
New Member
Well, I got the cvt and realized that there is a reason no one mounts them in frame.... with the cvt it is over a foot wide and way to bulky to allow for pedaling.... so I think this is going to become a rack mount...
Dave31
Active Member
I have the same motor and already tried to mount in frame lol
Unfortunately mine broke when I went to test fire it for chain alignment.
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Hey mate, I got the exact same pocket bike motor as you. Just stripped it down and retuned the carb.
Don't really know too much about motors and the such but two strokes seem pretty easy to self learn.
Just wondering if I need to take gear ratios into account? Can I use the sprocket from the pocket bike or is it adviseable to buy a new one? (reason why I ask is because I stripped the allen key head when trying to remove it - wondering if it was worth the effort to get it off).
Sorry for the hijack!
Don't really know too much about motors and the such but two strokes seem pretty easy to self learn.
Just wondering if I need to take gear ratios into account? Can I use the sprocket from the pocket bike or is it adviseable to buy a new one? (reason why I ask is because I stripped the allen key head when trying to remove it - wondering if it was worth the effort to get it off).
Sorry for the hijack!
john_the_great
New Member
given that a pocket bike has about a 6-12 inch tire the gear ratio will be to high when hooked up to a 26 inch bicycle tire, you will probably have to buy a bigger rear sprocket.(depending on which gear box you are going to use)
Bobby, you'll still need the chain-drive transmiission, which bolts onto the pb clutch. With its 3.25:1 gearing, that'll give you 18.75:1.....perfect for starters.
Dan
Staff
Have you seen this Bobby? http://motorbicycling.com/f36/motorized-bicycle-gear-calculator-4820.html
Really helps
Really helps
kerf
New Member
I personally feel rack mounting would work best for your pocket bike engine. If you are, however, intent on frame mounting, you might research Staton's Giant Stiletto system. It could give some insight into mounting and gearing.
Robin Subaru 7 speed shift with the Engine 33.5 cc Four Cycle GIANT STILETTO: Staton Inc
Robin Subaru 7 speed shift with the Engine 33.5 cc Four Cycle GIANT STILETTO: Staton Inc
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old motorbike
New Member
I built one with a cvt and made a rack mount, for dual suspension.
With the help of NEAT TIMES and others I found parts to drive all sprockets from the right side.(the cvt reverses the rotation) It works great.
The other is in frame and homemade shift kit with parts from SBP.
It has 6 speed and also works great. I first built a china girl and found these CAG motors have way more power and reliability.
With the help of NEAT TIMES and others I found parts to drive all sprockets from the right side.(the cvt reverses the rotation) It works great.
The other is in frame and homemade shift kit with parts from SBP.
It has 6 speed and also works great. I first built a china girl and found these CAG motors have way more power and reliability.
Attachments
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