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Old 05-07-07, 10:51 PM   #1
wethepeople
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Starting a big bike.

My friend just picked up a 1981 Husqvarna 430cc race bike. Kick start only, we know for sure it runs but neither of us can kick start it, we just don't have the weight. Now he's only 100lbs, he doesn't have a chance in hell, I'm 170lbs and I can still stand on the kickstart without it turning over, and it takes a lot out of me to get it to even turn over once. We tried to tow start it but the wheel just locked up. Like I said, we know it runs because the person who had it before drove it to my buddies house but he was 350lbs.

Any hints on starting it up without a decompression valve?
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Old 05-07-07, 11:04 PM   #2
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Find a big hill. Put the bike in first gear. Start rolling. SLOWLY engage the clutch.

Option 2: Get stronger.
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Old 05-07-07, 11:18 PM   #3
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Towing it behind a truck didn't start it, a hill won't either.
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Old 05-07-07, 11:23 PM   #4
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Are you sure the motor isn't seized? I have started a 'Busa by rolling down a hill.
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Old 05-07-07, 11:25 PM   #5
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Positive.

The rear wheel just locks, which I imagine is because #1 it's a dirt tire and has little traction on concrete and #2 it's dry and old, whereas with a 'busa you have a large contact patch.
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Old 05-07-07, 11:29 PM   #6
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Could you rig up a starter with a large roller and a large DC motor to spin the rear tire? Something similar to what they use to start race bikes.
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Old 05-07-07, 11:34 PM   #7
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I could probably rig it up on some kind of roller with another bike powering it, but I think a decompression valve would be easier.
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Old 05-08-07, 03:43 AM   #8
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Quote:
Originally Posted by wethepeople
Positive.

The rear wheel just locks, which I imagine is because #1 it's a dirt tire and has little traction on concrete and #2 it's dry and old, whereas with a 'busa you have a large contact patch.
Have you removed the spark plug to verify?

Try a second gear bumpstart.
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Old 05-08-07, 03:57 AM   #9
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Spark plug is new, we replaced it and the fuel lines, cleaned the carb out and did some other small things just for maintenance.

we've also tried to bump it in every gear but it just locked every time. We're going to try tomorrow, it's supposed to be warmer out and we might heatgun the tire or something to get it a bit tackier.
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Old 05-08-07, 03:59 AM   #10
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Have you tried to turn it over with the spark plug out?
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Old 05-08-07, 06:01 AM   #11
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put alittle gas directly into the carb and tow it with a truck in a dirt parkinglot, put all your weight over the rear wheel , once you get it started then if you dont let it sit too long it should start easier after that.
sounds to me like the innerworkings havent been lubed in awhile....when bikes sit everything dries up then the friction makes it hard to start.
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Old 05-08-07, 06:53 AM   #12
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Quote:
Originally Posted by Stacey
Have you tried to turn it over with the spark plug out?
Its not seized. He saw it running. Its the fact they are so small and thats a pretty big bike.

My best advice is to go find a hill. Bring it to the top. Roll down with the clutch in in 1st gear. Wait till you pick up some speed and dump the clutch. Once it starts up pull the clutch lever back in and rev it up to keep it running.

It will start. The tire is going to have limited traction on pavement thats why its locking up.

With practice you will get it but maybe have a bigger person do it the first couple of times.
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Old 05-08-07, 06:59 PM   #13
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haha, *****
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Old 05-08-07, 07:24 PM   #14
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Try these first:



If they do not work, order this:



and do this with it:

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Old 05-08-07, 07:45 PM   #15
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modify that hotdog cooker you made into an electric ignition
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Old 05-08-07, 07:46 PM   #16
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Heh. That's what I need.
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