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Old 01-25-2009, 07:20 PM   #1
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Default Roto start conversion

Hey guys. Is there anything special that I have to do when pulling out the pull start on a hyper 7 and recplacing it with a rotor start back plate. Is it pretty straight forward.
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Old 01-25-2009, 07:40 PM   #2
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do the sun gears inside the roto back plate have to oiled or greased. If so can I just use diff silicone oil or wd 40
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Old 01-25-2009, 08:17 PM   #3
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Quote:
Originally Posted by dishsoap View Post
do the sun gears inside the roto back plate have to oiled or greased. If so can I just use diff silicone oil or wd 40
Also the glow plug came with two copper shims. Do i use both of them. This hyper 7 has alot of diffrences than my L 8.
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Old 01-25-2009, 09:22 PM   #4
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anyone??? I am trying to get everything set up tonight so my son can run it tomorrow. Thanks in avanced.
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Old 01-25-2009, 10:08 PM   #5
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use 1 shim, use the pullstart until your engine is broken in, or you will ruin your bearing, and your start shaft....$40 to replace them..., dont put anything on the gears in the roto-start...dont use diff oil on anything but inside your diffs...WD-40 makes plastic shine..dont use it for anything else, get Mobile synthetic grease for your pinion gears..its a red paste comes in a tub..$9 lasts the rest of your life. maintain your car and your bearings, or things start to fail...i'm tryin here bud
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Old 01-25-2009, 10:14 PM   #6
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Ok thanks Jaz. You have been very helpful. I put the roto back plate on already. I will just take if off and put the pull start back on for break in.
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Old 01-26-2009, 07:25 AM   #7
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Let me explain why:

The engine you are putting the roto-start on is not made for a roto start.

The one-way bearing, and the shaft that turns it is made for the slow pulling on the rope, not the immense speed and torque that the roto-start is going to create.

What happens is the roto-start is actually too strong and especially when the engine is new and tight. The roto-start wears away at the shaft, and the one-way bearing because it spins it so hard it actually strips the metal.

You can use it immediately if you want, but you will be replacing those 2 pieces after about 1/2 gallon of fuel.

You will still need to replace those pieces regularly, you will know when they need it, as the starter will spin, but your flywheel will not. I would advise you have at least one shaft, and 1 bearing with you for when they fail. you dont want failure in the middle of the desert.
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