90 PSI compression on a Robin 244cc 2 stroke, good or bad

sbklf · 08-19-2013, 02:14 PM

After running it for 5 or so minutes I had 90 psi compression and it seems I read it should be like 120. Any chance I can just run it like this? If I do what can I expect?

1fast67 · 08-19-2013, 04:33 PM

90psi is minimal. A top end kit is in your near future. Anything bekow that you probably won't have much power and speed.

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dan161 · 08-20-2013, 03:02 PM

I agree with 1fast67, but if it seems to be running good then I'd go with it now. As far as I know there really isn't much damage your gonna cause by running it with low compression. But your right you should be up in the 115-120 range ideally.

sbklf · 08-21-2013, 06:26 AM

Thanks, sounds like the risk is loss of power, I will run it like it is.

redcloud · 08-21-2013, 08:52 PM

Try tightening the head bolts a bit. Poss to have a bit of loosness there that could cause a bit of loss or bad gasket. I would just take it off and look inside the cylinder for scoreing and poss head gasket failure. Just a thought and not allot of work to try. Gasket around $12 or so.

sbklf · 08-23-2013, 03:40 PM

Thanks, I will try to tighten the bolts

08-19-2013, 02:14 PM	#1
sbklf Getting Wild Join Date: Aug 2013 Location: Houston, TX Posts: 81	90 PSI compression on a Robin 244cc 2 stroke, good or bad After running it for 5 or so minutes I had 90 psi compression and it seems I read it should be like 120. Any chance I can just run it like this? If I do what can I expect?

08-20-2013, 03:02 PM	#3
dan161 Getting Wild Join Date: Apr 2013 Posts: 106	Re: 90 PSI compression on a Robin 244cc 2 stroke, good or bad I agree with 1fast67, but if it seems to be running good then I'd go with it now. As far as I know there really isn't much damage your gonna cause by running it with low compression. But your right you should be up in the 115-120 range ideally.
dan161 Getting Wild Join Date: Apr 2013 Posts: 106

08-21-2013, 06:26 AM	#4
sbklf Getting Wild Join Date: Aug 2013 Location: Houston, TX Posts: 81	Re: 90 PSI compression on a Robin 244cc 2 stroke, good or bad Thanks, sounds like the risk is loss of power, I will run it like it is.

08-21-2013, 08:52 PM	#5
redcloud Gone Wild Join Date: May 2013 Posts: 320	Re: 90 PSI compression on a Robin 244cc 2 stroke, good or bad Try tightening the head bolts a bit. Poss to have a bit of loosness there that could cause a bit of loss or bad gasket. I would just take it off and look inside the cylinder for scoreing and poss head gasket failure. Just a thought and not allot of work to try. Gasket around $12 or so.
redcloud Gone Wild Join Date: May 2013 Posts: 320

08-23-2013, 03:40 PM	#6
sbklf Getting Wild Join Date: Aug 2013 Location: Houston, TX Posts: 81	Re: 90 PSI compression on a Robin 244cc 2 stroke, good or bad Thanks, I will try to tighten the bolts

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08-19-2013, 04:33 PM	#2
1fast67 Gone Wild Join Date: Mar 2012 Location: spokane,wa Posts: 974	90psi is minimal. A top end kit is in your near future. Anything bekow that you probably won't have much power and speed. Sent from my SGH-T999 using Tapatalk 2

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