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Post by oldsman on Jan 16, 2014 0:41:02 GMT -5
I am doing a engine swap on a 85 Honda ATC70 70cc. I am installing a Lifan 125cc 1P52FMI. Also swapping handle bars with a wider and taller one. Doing away with the thumb throttle and going with a twist style. I took some videos of what I have done so far and I'll upload them tomorrow. The reason for the swap is the power increase, CDI instead of points for easier starting, and more fun all around. Also he was afraid to install a BBK on such an old engine so he ordered a brand new Lifan engine. Another thing that is nice is having a new engine is having a 4 speed vs the 3 that was on it. One thing is going to be the biggest pain in the butt is the kick starter hitting the fender. More on that tomorrow.
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oldschoo1
Scoot Member
I have scooters....
Posts: 51 
Location: Ketchikan, Alaska, USA
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Post by oldschoo1 on Jan 16, 2014 1:54:05 GMT -5
When I threw a Lifan 125cc on my Honda Passport C70, I never did get to find the new top speed. It used to top out at 54mph. But with the 125, I could wheelie like crazy and at half throttle cruise at 70mph with gearing and power to spare. Never went faster than that because the wheels would start wobbling real bad.
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Post by moofus02 on Jan 16, 2014 3:40:39 GMT -5
Should be able to swap all the pull start stuff from the 70 to the new motor
Sent from my SPH-L720 using proboards
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Post by nelson on Jan 16, 2014 8:46:45 GMT -5
i had a 1987 atc70, loved that little thing. it was my sons first motorized vehicle. I also know a guy who did a swap like you are talking about and also extended the gas tank and the wheelbase over all. It is a really badass little "pitbike". i will see if i can get you a picture of it for inspiration! The actual owner died a few months ago riding his bike with his son, crazy accident that happend at low speed. But the dude had a killer honda collection!
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Post by aeroxbud on Jan 16, 2014 16:54:34 GMT -5
I have not seen one of those little trikes for years. Must be very collectable now. We want pictures  |
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Post by oldsman on Jan 16, 2014 21:14:52 GMT -5
Should be able to swap all the pull start stuff from the 70 to the new motor Sent from my SPH-L720 using proboards Only if you get the adapter to do this. I went to upload some videos and for a 3 min video it said id will take 90 min to upload it. BS. Ill go somewhere where the internet dont suck and upload them. My internet (ATT) is such BS. Soon to have comcast back and I cant wait. |
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Post by oldsman on Jan 18, 2014 5:07:46 GMT -5
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Post by oldsman on Jan 18, 2014 6:08:45 GMT -5
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Post by aeroxbud on Jan 18, 2014 10:57:29 GMT -5
Nice work  Keep the videos coming |
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Post by 90GTVert on Jan 18, 2014 11:16:31 GMT -5
Cylinder nuts at the front may hit the front fender if it's as close as it looks in the vid. Stroke on the 125 is I think 11mm longer, so nearly 1/2". My old cateye midbike rubbed the cylinder nuts on the tire when the front compressed after wheelies when I went from an 88cc to a 114cc (+8mm stroke).
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Post by oldsman on Jan 18, 2014 11:40:16 GMT -5
They did hit. I dropped the front fender to get clearance. I show that in another video. I have more to upload. Ordered the pull start spacer and have to machine the flywheel ring to fit. Also have to work on the intake and the gas tank to get clearance. Ill have more videos up later today. I dont know why my camera is not taking better videos. I think its time to get a good HD camera for the shop.
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Post by 90GTVert on Jan 18, 2014 11:58:35 GMT -5
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Post by oldsman on Jan 19, 2014 2:03:38 GMT -5
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tvnacman
Scoot Enthusiast
Posts: 408
Location: NYC
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Post by tvnacman on Jan 19, 2014 5:17:40 GMT -5
Wayne , you make nice video's !!!!!!
John
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Post by oldsman on Jan 19, 2014 8:27:39 GMT -5
Thank You John. I try to make them where you can see the work Before, During and After.
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