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post #31 of 35 Old 08-05-2013, 5:16 AM
 
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Re: Help please 1984 XR 100

Inside a gas engine there is a spark plug. A gas engine that is fed the following three things in the right amounts will always start provided the timing is correct and the following ingredients are mixed in the proper ratio. Air to oxidize the fuel, fuel atomized and mixed with the air to a stoichiometric ratio, and spark correctly timed to ignite the mixture. When you pour starting fluid into a gas engine it can do a few bad things. It can cause pre-detonation since the compression inside the engine may heat the air enough to cause pre ignition of the ether. Ether also burns faster then gasoline creating higher pressures inside the engine. It is completely possible to crack a piston, blow out head gaskets, or bend rods if enough is used. It can cause ring or cylinder damage by washing the cylinder dry or wearing down the top ring with repeated heavy use. Gas engines are not designed to withstand the forces that may develop from using ether inside them.

Also can create excess combustion pressure and make exhaust valves hard to open causeing bent valves (rare but not unheard of). And or it equipt with push rods not to uncommon to bend connecting rods.

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Last edited by 900rrHonda; 08-05-2013 at 5:29 AM.
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post #32 of 35 Old 08-05-2013, 6:06 AM
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Re: Help please 1984 XR 100

Quote:
Originally Posted by 900rrHonda View Post
Inside a gas engine there is a spark plug. A gas engine that is fed the following three things in the right amounts will always start provided the timing is correct and the following ingredients are mixed in the proper ratio. Air to oxidize the fuel, fuel atomized and mixed with the air to a stoichiometric ratio, and spark correctly timed to ignite the mixture. When you pour starting fluid into a gas engine it can do a few bad things. It can cause pre-detonation since the compression inside the engine may heat the air enough to cause pre ignition of the ether. Ether also burns faster then gasoline creating higher pressures inside the engine. It is completely possible to crack a piston, blow out head gaskets, or bend rods if enough is used. It can cause ring or cylinder damage by washing the cylinder dry or wearing down the top ring with repeated heavy use. Gas engines are not designed to withstand the forces that may develop from using ether inside them.

Also can create excess combustion pressure and make exhaust valves hard to open causeing bent valves (rare but not unheard of). And or it equipt with push rods not to uncommon to bend connecting rods.

Except that nobody is talking about "pouring starting fluid into an engine". The act of spraying it in pre-atomises it so it is much more volatile. The act of turning the engine over sucks that atomised fuel in with a lungful of air, and then pumps it out the exhaust port if the engine fails to ignite it for some reason. You would be more likely to cause damage spraying fuel in as it is more likely to remain in liquid form.
Why would you be spraying starter fluid into a hot engine?
You appear to be describing using ether as a fuel rather than for diagnostic or starting purposes, in that case I would agree with you for the most part, but it has nothing at all to do with what we've been discussing.

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Last edited by bladeracer; 08-05-2013 at 6:20 AM.
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post #33 of 35 Old 08-05-2013, 1:58 PM Thread Starter
 
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Re: Help please 1984 XR 100

well back on topic lol. I did clean the entire carb 2 days ago. nothing is blocked that I can tell. the bike fires up on the first kick with the choke on full. once its idiling if i put the choke on middle position seems to run with proper revs. if i turn choke all the way off it revs very high. No missing on the motor seems timing is ok. I am at a loss as to how to remedy this
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post #34 of 35 Old 08-05-2013, 9:18 PM
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Re: Help please 1984 XR 100

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Originally Posted by sammar View Post
well back on topic lol. I did clean the entire carb 2 days ago. nothing is blocked that I can tell. the bike fires up on the first kick with the choke on full. once its idiling if i put the choke on middle position seems to run with proper revs. if i turn choke all the way off it revs very high. No missing on the motor seems timing is ok. I am at a loss as to how to remedy this

Okay then :-)
The choke circuit appears to be fine.
When you turn the choke off it sounds like the engine is going very lean though.
How many turns are on the mixture screw?

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post #35 of 35 Old 08-06-2013, 10:18 AM Thread Starter
 
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Re: Help please 1984 XR 100

i tried at almost all settings turning screw 1/2 a turn every time. I originally had it at 2 1/2 turns out
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