Piston and Cyl pics...
- maddog1927
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Piston and Cyl pics...
helping a friend with his 500. Top end has about 2 hrs on it. Reason for tear down is a shifting issue, but noted some marks on the piston and cylinder. Ring end gap is .016".
Any ideas on what caused this and how to correct. Some of the scratches in the piston are .005" or so. with eyes closed marks in cyl cannot be felt.
Any ideas on what caused this and how to correct. Some of the scratches in the piston are .005" or so. with eyes closed marks in cyl cannot be felt.
- maddog1927
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- britincali
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no point in making a 10min deal a 7hr head scratcher. alot of bullshit to figure it on paper. im not even sure how to do it. wouldnt you still have to pour something in the dome then subtract the amount the piston protrudes into it then figure was volume in in the headgasket bore and blah blah blah. ill stick with oil in the plug hole
[youtube]http://www.youtube.com/watch?v=Pj3SIXtL ... e=youtu.be[/youtube]100hp honda wrote:....but thanks for your concearn on my math skills
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I told you to buy the bore gauge.... so you have that right?
So measure the bore.
With that measurement, the distance from the roof of the exhaust port to the deck, the head gasket thickness, and the head volume you can compute the true compression ratio.
THEN, if you change ( or just want to run the numbers) on a new setup like a different head or exhaust port timing... you just punch the numbers into your calculations...
Its 2011 Clyde.
So measure the bore.
With that measurement, the distance from the roof of the exhaust port to the deck, the head gasket thickness, and the head volume you can compute the true compression ratio.
THEN, if you change ( or just want to run the numbers) on a new setup like a different head or exhaust port timing... you just punch the numbers into your calculations...
Its 2011 Clyde.
The REAL FUCKING compression ratio starts when the exhaust port closes ..... grasshopper.100hp honda wrote:watch and learn grasshopper
500cc of displacement, crammed into a 50cc chamber ISNT a 10:1 motor.
Ahhhhhhhhh.................. no.
If you think that, it explains ALLOT as to why your shit doesnt run...
- 2strokeforever
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and the dome shape on the top of the piston dosent matter?With that measurement, the distance from the roof of the exhaust port to the deck, the head gasket thickness, and the head volume you can compute the true compression ratio.
that could depend on the pipe and rpm if you want to get technical, to figure out what exactly is going on in there is gonna be tough500cc of displacement, crammed into a 50cc chamber ISNT a 10:1 motor.
the 450 will have less power and will be harder to start, and will be heavier, but to make up for it it will require more maintenance.
4stroke=dead fish
4stroke=dead fish
- 2strokeforever
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good point, i never even thought about that
maybe he assembled it dry, without oil and the first time it ran it scored a little?
maybe crooked bore and/or tight piston
if it was put together and it didnt shift i would wonder if whoever put it together knew what they were doingReason for tear down is a shifting issue
maybe he assembled it dry, without oil and the first time it ran it scored a little?
maybe crooked bore and/or tight piston
Last edited by 2strokeforever on November 13th, 2011, 10:31 pm, edited 2 times in total.
the 450 will have less power and will be harder to start, and will be heavier, but to make up for it it will require more maintenance.
4stroke=dead fish
4stroke=dead fish
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Can you even read?100hp honda wrote: at this point your kinda looking really dumb
I'm starting to think Gsslen IS your Dad... Why dont you go on Springer, and have a "Baby-Daddy" test done?AlisoBob wrote:...With that measurement, the distance from the roof of the exhaust port to the deck, the head gasket thickness, and the head volume you can compute the true compression ratio.