micargi hero 20"

[Roscoe458]

My next build I was thinking about slapping at 66cc 2 stroke on a micargi hero 20". I know it will be tight fit but I've seen it done before. My question is would I need a different sprocket other than the stocked one that comes with most kits. Why, or why not? If so where can I get one and what would I need. THANKS!

Here's an example of what I've seen
http://ep.yimg.com/ca/I/yhst-10337746512064_2202_570371

 

[The_Aleman]

A smaller sprocket is desired because the Hero only has a 20" wheel. Wheel size affects the gearing. With a 26" wheel, the stock kit sprocket (usually 44T) nets 26MPH @ 6000RPM. With a 20" wheel, that becomes 20MPH. You'd need a 34T sprocket on a 20" wheel to match that ratio.

I can't help you with where to get one, I'm not up to date on the best place to get sprockets for that setup.

 

[robbomberbomyea]

check out pirate cycles for sprocket and adapter,bgf ebay for stock style 36t.pirate has built one for sale they may tell you thier secrets to set up.good luck on build.

 

[Roscoe458]

Thx for the tips guys! I figured I would need a smaller sprocket but I don't really understand how the adapter works with a smaller sprocket or why you need it. Can someone help me out and explain. Like why could I not just buy a smaller sprocket and just put it on a bike?

 

[mapbike]

Roscoe458

BGF has a 32T that works great on the stock rag joint that comes in the engine kits, I have one of these exact sprockets on one of my bikes.

Hope this helps you out on this.

http://www.ebay.com/itm/Motorized-b...Cycling_Parts_Accessories&hash=item2a15c94b21

Peace, Map

Thx for the tips guys! I figured I would need a smaller sprocket but I don't really understand how the adapter works with a smaller sprocket or why you need it. Can someone help me out and explain. Like why could I not just buy a smaller sprocket and just put it on a bike?