Honda Spree and Elite 50 Forums

lilredspree wrote:Baka, if I dont use pump gas and go buy some racing fuel, what should I run?

then you can run the gaskets that comes with the kit

I'll check psi on my bore tomorrow to see where its at.

lilredspree wrote:I'll check psi on my bore tomorrow to see where its at.

compression psi and compression ratio is 2 different things so keep that in mind.

ya. just wanting to make sure my psi is in the right ball park. do you know about what the CR of this kit is or should i try to calculate it? would it be alright to just cut my own out of gasket paper if i want to run pump gas?

lilredspree wrote:ya. just wanting to make sure my psi is in the right ball park. do you know about what the CR of this kit is or should i try to calculate it? would it be alright to just cut my own out of gasket paper if i want to run pump gas?

dont add base gaskets.you will put the port timing to high. add head gaskets to lower the compression ratio down if your planing on running pump gas.

Baka, what compression ratio should I shoot for. I think I'm only at like 8:1 right now (thats with about a 12 cc combustion chamber. need to take my time filling it with water and try to be more accurate, unless you have suggestions for a better way to do this)

Also, when at BDC the piston is riding about a mm above the intake ports. Is this normal or should I actually add some base gasket to bring the piston flush with the intake ports at BDC?

lilredspree wrote:Baka, what compression ratio should I shoot for. I think I'm only at like 8:1 right now (thats with about a 12 cc combustion chamber. need to take my time filling it with water and try to be more accurate, unless you have suggestions for a better way to do this)

Also, when at BDC the piston is riding about a mm above the intake ports. Is this normal or should I actually add some base gasket to bring the piston flush with the intake ports at BDC?

the 50mm kit is rated at 12.5to1 8to1 is almost what the stock cylinder setup is.most aftermarket kits are 12to1 or higher. adding the 1 or 2 extra head gaskets should bring the ratio down. dont go by where the piston sits compared to the port. that is the common mistake alot of guys do. if you want to be sure, use a degree wheel and see where the exhaust port duration and intake durations are.thats the only way to know where it should be. where did you get that kit from?

Ended up capping the head with a piece of plexiglass with a hole in the middle. The head is less than my quick measurement of 12cc which actually makes my compression ratio right about 11:1 with a single head gasket. If I ran 2 head gaskets it'd be about 9.9:1, 3 head gaskets will put it about 9:1. Got the kit off tazland on ebay I believe.

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http://www.jiangwayne.com/scooter/p_i.php?i=61

Thats the pipe I actually ended up with. Jiangwayne sent me the wrong one and it was too much to try to send it back for a return so they sent me a discount back.

yeah same durations for that pipe too.

Exhaust duration:170
Intake duration: 118

try and put another base gasket and measure again and see what you get.

If only I had more base and head gaskets. Where could I go about finding them for the 50mm bore?

go to oriellys and buy a gasket paper sheet and cut your own. get the tan thin one. the gray ones are way to thick. get the thinnest sheet. those usually measure around .4mm thick. use the gasket you have now as a template to make your others.