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Discussion Starter · #1 ·
Hey guys, im trying to make a drag minibike. I am wanting to use a chainsaw clutch to put power to the axle. can someone tell me if it can be done and maybe get me going in the right direction? if anybody thinks i can do it ill post some pics of the couple of clutches i have and maybe they can tell me which would be best to do it with..

thanks guys hope someone has some experience with these
 

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Discussion Starter · #4 ·
N G H..........Not gonna happen.........Youre gonna need a Hartman oil clutch......Theres no way around it...Chainsaw clutches are weighted and engage earlier than the powerband ever kicks in..............

http://rearenginekarts.com/clutches.htm


awe dang cam, not what i was wanting to hear. im working on trying to get one, funds dried up so i was exploring alternatives. I traded that ah58 i had and got some nice intake manifold and a mcculloch flatback carb. I think the guy was good to me. i could be wrong but seemed like a good guy.

I am hoping to attempt to put all the needle bearings back in tomorrow, i ported the crap out of the motor so i hope that goes well. I wish there was a youtube video that shows how to put a mc49 back together. i got the diagrams and the disk im just super nervous and dont wanna blow the motor up. i got a lot of time invested in it.
 

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awe dang cam, not what i was wanting to hear. im working on trying to get one, funds dried up so i was exploring alternatives. I traded that ah58 i had and got some nice intake manifold and a mcculloch flatback carb. I think the guy was good to me. i could be wrong but seemed like a good guy.

I am hoping to attempt to put all the needle bearings back in tomorrow, i ported the crap out of the motor so i hope that goes well. I wish there was a youtube video that shows how to put a mc49 back together. i got the diagrams and the disk im just super nervous and dont wanna blow the motor up. i got a lot of time invested in it.
Needle bearings are easy to put back in..I do it everytime I rebuild an outboard boat engine..The trick is to use a molybedenum or even lithuim based grease to keep the needle bearings in place.....

There are u-tube vids that show steps...put vintage race kart engine building..

Mc49

http://www.youtube.com/watch?v=SGdSYIOgeSg

This MC5 is the closest engine to the MC49...It even uses the MC49 piston..........

http://www.youtube.com/watch?v=R2ZGg0LYSRI

http://www.youtube.com/watch?feature=endscreen&v=ksfh5vfUpz4&NR=1
 

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Put the whole chainsaw motor on the bike and then post vids lol

Cam does it hurt if my carbs on backwards? haha.. i just realized it is a few days ago and the now-front side is tapered wide and the back side w speedbump is grinded almost straight edge to go against gasket and manafold. It turns out its decently sealed to the carb and barley any acculates on carb surface for how wide the carb opening is compared to the gasket hole lol. I wonder if I matched the manifold and rubber gasket hole to the carb the way it is if it would be ok and with that rubber strip on that side of the carb. By the way the bikes rips and runs great even with many gallons run through over summer with the same 1 plug

both sides of the carb seem to be the same thing besides the inlet and outlet which I've changed. The throttle cable does a u turn coming out of the carb this way but seems to function fine as well lol
 

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Put the whole chainsaw motor on the bike and then post vids lol

Cam does it hurt if my carbs on backwards? haha.. i just realized it is a few days ago and the now-front side is tapered wide and the back side w speedbump is grinded almost straight edge to go against gasket and manafold. It turns out its decently sealed to the carb and barley any acculates on carb surface for how wide the carb opening is compared to the gasket hole lol. I wonder if I matched the manifold and rubber gasket hole to the carb the way it is if it would be ok and with that rubber strip on that side of the carb. By the way the bikes rips and runs great even with many gallons run through over summer with the same 1 plug

both sides of the carb seem to be the same thing besides the inlet and outlet which I've changed. The throttle cable does a u turn coming out of the carb this way but seems to function fine as well lol
Im curious about what youre saying and gotta see this.......Take pics of the carb and the way its mounted then post it. Pumper carbs are made to mount and work only 1 way....The purgeport holes must all line up with the carb or the internal pump wont pump the fuel
 

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Discussion Starter · #12 ·
All this mechanic talk has me itching to fix my old weed eater lol ...

:p breaking my weedeater and fixing it is how i got into karts and bikes, I started buying them from the scrapyards for $5 each and 9/10 of them only needed a new fuel line and primer bulb. so $6 would usually fix them and then i would post them on CL and try use them for trades or just sell for $30-$50 . now i got a mini junk yard going. :( i did part with two karts last night. thats like picking a fresh scab, it hurts a bit so you gotta do it quick.

once buy them as junk and get them all fixered up for some reason i dont want nothing to do with them anymore. I sold my baja manco i got for $35, i cut the guy a deal since it was for his daughter, and she really enjoyed the test ride. for this area the $300 i sold it for is a good price they usually sell between $400-$550. wasnt trying to get rich but the wife wants that starbucks coffee machine for xmas and i was running out of time.

The other kart i traded for a mcculloch 250 chainsaw so i can convert the motor. THIS ONE RUNS!!! and that makes my day. that kart had a total of $50 invested with everything but clutch.


so now I am trying to convert 2 mcculloch saws to kart motors.
 

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Discussion Starter · #13 ·
finally the pics i sent myself arrived.


here is the new mac 250 block (new to me)

this block came like this, the carb is a different series but same model #, a couple of the parts are a slight bit different , mainly the difference is the parts on this saw block are a bit thicker, heavier. So i am guessing its an earler model 250 saw. But honestly i have no idea thats a total guess since parts are thicker i figure the later models were thinner for reduced production costs.
 

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Discussion Starter · #14 ·
here is the first 250 saw intake side of the block, the two bars that go from the intake ports to the bottom of the window were not removed yet in this pic, i have since done it. but when i was surprised to open the 250 i got yesterday and see it was already done up like that from the factory.

thats kinda weird that they would change it up like that, do they change it based on performance or why? if anybody knows anything please educate me. :D

thanks guys have a great day
 

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I download my 12meg photos to Windows 7 Home Premium, Pictures, then drag them from there to the Paint window, click the image box, resize button, click Pixels button and type in 1350 pixels in the top box and click Ok or Save. That will get you in the 400Kb to 512Kb, somethime you can post here. Yout Avatar photo is 87Kb. not to big, your can get by with 105Kb photo.
 

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Discussion Starter · #18 ·
I download my 12meg photos to Windows 7 Home Premium, Pictures, then drag them from there to the Paint window, click the image box, resize button, click Pixels button and type in 1350 pixels in the top box and click Ok or Save. That will get you in the 400Kb to 512Kb, somethime you can post here. Yout Avatar photo is 87Kb. not to big, your can get by with 105Kb photo.
Cool, I'm gonna try to get all my pics in one folder then try to change them all . Thanks for the help
 

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Discussion Starter · #19 ·
Here's one finished cover, for my pops xmas gift, I'm trying to do another Mac for myself

http://i1278.photobucket.com/albums/y518/bootnyleefonsworth/1354936812003.jpg

Just gotta actually put the motor together, gonna blast the block first. Then I'll have no excuses but to put the block back together

And need to find him a vintage Kart, I don't wanna give up my Margay

I'm hoping to use mine in a mini drag bike project I just started.
 
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