Engine failure, oil mix ratio and other data

velardejose

New Member
Sep 9, 2008
120
0
0
Lima, Peru
Hi
I am reading posts about engine failure, and I think it would be useful for the forum to know more details like the oil mix ratio, intake air leaks or other data
I seized my engine and autopsy revealed a broken ring
I had an intake air leak for some days and oil mix ratio was 40:1, use was daily commuter use, flat streets at almost wot
Jose
 

jasonh

New Member
Jun 23, 2008
1,590
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37
Longmont, CO
The air leak + little oil + high rpms will surely lead to motor damage.

I use 32:1 and if the bike has an air leak, it gets fixed before riding.
 

velardejose

New Member
Sep 9, 2008
120
0
0
Lima, Peru
Sorry
There was a confusion
My engine has the piston and rings ok
Seems that the failure is in the bottom end
My local representant offered to give me a new engine
I miss my mb
 

Biker Mike

New Member
Mar 21, 2008
143
0
0
Cropwell Alabama
WoW!!! What a warranty. Mine was 30 days. I hope I do not have a seizure. rotfl I don't think I would be as lucky as you to get a complete replacement. You should except his offer and really advertise his generosity to others. We need more people to back their products like this. Have fun. (^)
 

Bikeguy Joe

Godfather of Motorized Bicycles
Jan 8, 2008
11,843
237
63
up north now
I had an intake air leak for some days and oil mix ratio was 40:1, use was daily commuter use, flat streets at almost wot
Jose

You are VERY LUCKY if the seller will replace the engine under warranty after that kind of total abuse.

Keep us posted as to how you make out.
 

velardejose

New Member
Sep 9, 2008
120
0
0
Lima, Peru
Hi
I saw the disassembled engine yesterday
A ball bearing failed, causing it to seize now and then
Other than that the engine is ok
Both china bearings will be replaced with japan Koyo units (seller pays)
I told the seller that I want to keep this particular engine, because it is already broken in and will have japan ball bearings
Oil mix ratio and break in procedure was by seller suggestion
I asked the mechanic, and judging by the sparkplug and combustion chamber he suggested to use more oil
So
I hope to have my bike ready for today (or tomorrow)
And will use 30:1 oil mix
Peace
 

bumleg

New Member
Nov 8, 2008
41
0
0
nova scotia
i dont understand whe we are suppose to use 30:1 ratio when the oil nowadays is good for 50:1
is it not the lubricating factor of the oil that determines ratio?

for example i had an old cat snow mo back in the day
factory called for 20:1
but i used 50:1 (cat dealer suggestion) because the oil now is that much better.
 

Bikeguy Joe

Godfather of Motorized Bicycles
Jan 8, 2008
11,843
237
63
up north now
You can use any ratio you want...it's a matter of personal preference and like having a (mental) safety net under your tightrope.