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Atc 70

This is a discussion on Atc 70 within the 1973-1985 ATC70 and TRX70 forums, part of the General Talk category; Originally Posted by Andrae Hey what about the oil pump? Do I need to change the oil pump if I decide to go with the ...

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  1. #16
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    Quote Originally Posted by Andrae View Post
    Hey what about the oil pump? Do I need to change the oil pump if I decide to go with the 88cc kit?


    Yes with any big bore kit you should always install a high volume oil pump. I find it kind of hard to imagine an ACT70 with a kick start only motor
    If a mini is considered an iron pony, and an pony is relatively half the size of a horse. Does that mean it only has .5 Horsepower?


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    Quote Originally Posted by Andrae View Post
    To get the engine punched out to a 108 don't I have to have a stroker crank? Like I said I'm sort of new to this Atc 70 thing.






    yes and while your in there...do the clutch and change the gear ratios or go 4spd




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    you can also get the pull start adapter from the DR

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    tbolt has a 88cc kit for the 70. Comes with evrything you need. They also sell a stroker seperatly to make it 108cc. I have heard the 88 kit from them is very nice.

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    with the correct piston you can use a stroker crank for a crf50 and swap in a modern cdi setup. my avatar bike is an atc70 motor punched out and stroked to 117 with a cdi crank

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    Quote Originally Posted by tblumer View Post
    with the correct piston you can use a stroker crank for a crf50 and swap in a modern cdi setup. my avatar bike is an atc70 motor punched out and stroked to 117 with a cdi crank
    Ok thanks. If I went with a Lifan 125 with a kick start, could I still use my stock brake setup. I just wanted to keep it simple because I'm not a mechanic lol.

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    Just add a second lever and run the clutch cable to that, I moved the brake to the throttle side an put the clutch on the left.

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    Do you plan on using the stock thumb throttle?

    tmas
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    Quote Originally Posted by tmas View Post
    Do you plan on using the stock thumb throttle?

    tmas
    Yes

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    Quote Originally Posted by tblumer View Post
    Just add a second lever and run the clutch cable to that, I moved the brake to the throttle side an put the clutch on the left.
    Ok thanks. I'm probably gonna order the engine off ebay. But the thing about it is that there's nothing wrong with the stock engine. I feel like it will cost alot of money trying to make the Honda engine perform like a 125cc Lifan.

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    You should order the engine from a forum sponsor like Wholesale Cycle.....that way you will have someone to talk to if you get in a jam

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    Seems an electric start would make things tonnes easier. I've seen both over and under mount starters on the 125 engines; however over mount requires rev'd intake mount a la KLX110. Don't think there's room under the tank for that; actually if I recall real estate under the tank is REALLY hard to come by on ATC70.
    I ride.

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    Yes, very true, I had to dent the underside to fit a vm24

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    Quote Originally Posted by doopsx3 View Post
    You should order the engine from a forum sponsor like Wholesale Cycle.....that way you will have someone to talk to if you get in a jam
    ok I will give them a call.

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    Quote Originally Posted by Andrae View Post
    I don't know I might have to cut the fenders. I heard you can shorten the kick starter.


    I used a shortened stock Z50 kicker on my 125 ATC70 when I had it. tmas is right- a small foot helps... I have a size 10.5 shoe and if the plastics were trimmed correctly you can do it.



    Also, I had a manual clutch and it was WAAAAY more fun for snow, dirt and mud. It was easy to dump and break the rear end out. Typing this makes me miss that little guy...



    -HFM

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