Author Topic: 1 oily plug  (Read 690 times)

ybk

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Re: 1 oily plug
« Reply #15 on: April 28, 2018, 10:24:04 PM »
There is a rough oil pump on ebay at the moment if you want spares..
All my bikes have always smoked unequal amounts, usually the lower cyclinder just due to gravity I reckon not necessarily a bad oil pump. When it's warmed up and still unequal then maybe yeah

bulldogboy

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Re: 1 oily plug
« Reply #16 on: May 12, 2018, 08:36:27 PM »
Just to update this thread.. i today removed the plug from the bottom cylinder which i put in a while back. The old plugs i removed were quite oily, see first pic in thread. The new plugs have prob done about 50/60 miles, couldnt get to other side of bike to look at top cylider plug, but the new one on bottom cylinder was surprisingly clean, look at the pic, i expected it to be bit oily?it has a slightly red tinge to it? How could it go from oily to clean? Nothing changed on set up, am i right in thinking if it was too lean it would be whitish?

yanw

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Re: 1 oily plug
« Reply #17 on: May 15, 2018, 11:02:08 AM »
I suspect that the old plugs had been in there a long time and got fouled up. Once they started breaking down they probably fouled up even more.

To be sure about the "leaness" you need to do a "plug chop" on an gently incline or on a dyno (or check the A/F mix on a dyno).

bulldogboy

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Re: 1 oily plug
« Reply #18 on: May 15, 2018, 01:17:55 PM »
Thanks Yan,  the bike was mellorps r.s, he knows what hes doing, he serviced the carbs before he gave me the bike, but last time out it felt a bit rough, and was going flat when it hit top gear, does that sound like carbs?was wondering if i should get it dynod Theres a place near me called performance fabrications. Run by mark dent, theyre 2 stroke specialists, bloke does mega pipe welding fabrications,and they have a dyno.

yanw

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Re: 1 oily plug
« Reply #19 on: May 15, 2018, 03:05:41 PM »
If you want to be sure then dyno it but if it's Phil's old bike I'd be confident he had set it up correctly.

bulldogboy

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Re: 1 oily plug
« Reply #20 on: May 15, 2018, 03:46:16 PM »
Yes i went to phils, hes certainly an enthusiast! Not suggesting for a minuite he hadnt  set it up fine it just freaked me out a bit when the plugs were oily as one minuite, and clean as the next, albeit after  only 50/ 60 miles.Basically, im pretty clueless, and it can make you paranoid reading the threads on how easy it is to seize an engine if things are lean .What do you reckon on the colour of the plug in the last pic? Going to ride it again this eve, see how it is, just seemed lumpy low down and ,a bit flat in top gear.

bulldogboy

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Re: 1 oily plug
« Reply #21 on: May 15, 2018, 10:40:32 PM »
update... rode it this evening down to the local bike meet, and it was going real well, i gave it the berries through every gear, seemed fine  think i need to stop worrying and just ride it 8)