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Post by dto79px on Jul 30, 2006 21:02:14 GMT
Hi , i have a 79 p125x it's standard apart from engine rebuild with DR 180 piston, barrel and head kit and have up-jetted standard carb to suit , it pulls better up hill but the top speed is still about 50 mph is this normal ?
also should a kitted scoot run on more oil ? im running 50-1 as in haynes manuel ?
i have read that its not good to run in a new engine with synthetic oil im using putalin mx5 is this oil ok or should i use a normal semi-synthetic oil till fully run in ?
hope someone can answer some of these questions
darrin...
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Post by dto79px on Aug 6, 2006 19:16:26 GMT
NO ANSWERS THEN??
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Post by Spence on Aug 7, 2006 11:18:24 GMT
I was also under the impression that fully-synth isn't good for running in.
When it comes to tuned scoots, I'm afraid I can't help you, I like to keep it simple.
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ben
2nd Class Ticket
Posts: 13
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Post by ben on Aug 7, 2006 11:57:29 GMT
Hi,
I can't help with the top speed I'm afraid.
Re the running in. Yes running in an engine should really be done using a mineral oil which helps to seal any possible areas of leakage with the mineral deposits left behind.
However if you're using a synthetic oil, you shouldn't downgrade. A good rule of thumb is always go up the scale not down. Your engine, especially one that is running in will develop tolerances based on the oil used so going down to semi synth or mineral could do more harm than good.
If you're experiencing no leaks from the engine using synth oil then it should be ok.
Cheers.
Ben.
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Post by dto79px on Aug 7, 2006 13:39:37 GMT
thanks for the help, the oil i am using is putaline mx5 premix it just says synthetic on bottle and not fully-synthetic as on the oil i use in my typhoon 125 , all modern twist and go 2 stroke scooters run on fully-synthetic from new so it can't be harmful to engine run in ?
thanks darrin.
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ben
2nd Class Ticket
Posts: 13
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Post by ben on Aug 7, 2006 14:32:59 GMT
Hi Darrin,
That's right - it won't harm your engine. I'm no mechanic, but from what I know/have been told by people that do know. Older engines weren't quite as accurately built as with todays modern engines using better technology. So they'd sometimes have gaps around the pistons/bore. A mineral oil will find these gaps & leave deposits which will seal them.
But as you say most modern engines are filled from the dealer using fully synthetic oils which is a better quality oil anyway.
Cheers.
Ben.
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