inlet valve deposits - MVAgusta.net
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post #1 of 61 (permalink) Old 02-09-2016, 11:51 PM Thread Starter
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inlet valve deposits

Sstripped my 1078 for its 60,000km service and I have some carbon deposits on the backs of a couple of the inlet valves whilst the others are quite clean. I am probably worrying about nothing and am not going to strip the motor on account of it but wondering if there is any additive or different fuel ( in Australia) that might help. It was much the same at 48.000ks . Any theories on why this would be ?
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post #2 of 61 (permalink) Old 02-09-2016, 11:59 PM
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In our case this is mostly caused by oil coming past a valve stem seal, or sometimes a rich running engine, but others might be able to give you more info on this Cus.
I've seen people use SeaFoam to clean the system - http://seafoamsales.com/sea-foam-motor-treatment/ but I imagine there's a lot of option out there these days.

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post #3 of 61 (permalink) Old 02-10-2016, 12:06 AM Thread Starter
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I could get in there with something to loosen the worst of it but wouldn't want any of it lodging on the valve seat and holding a valve open.
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post #4 of 61 (permalink) Old 02-10-2016, 12:10 AM Thread Starter
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Checked out the sea foam site, looks like it`s worth a try, I will see if it is available here. Yanks get all the good stuff.
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post #5 of 61 (permalink) Old 02-10-2016, 12:14 AM
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Wink ?

intake valve seals......

and believe it or not the cheapest place to buy them....... the dealer

I kid you NOT


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post #6 of 61 (permalink) Old 02-10-2016, 02:16 AM Thread Starter
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Quite some time ago after a service it became obvious the air filter had been massively over oiled as in running down the frame and making a hell of a mess when the bike was warm. I just twigged the two valves with deposits are on the low side of their respective throttle bodies when the bike is on the side stand. What`s the chances the excess filter oil created the deposits ?
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post #7 of 61 (permalink) Old 02-10-2016, 03:04 AM
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Wink ?

cheapest fix ......Marvel Mystery Oil, been around forever, add the recommended

amount to your tank......

I use it in all my air tools too



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post #8 of 61 (permalink) Old 02-10-2016, 03:10 AM
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Cus,there is a product on the market to clean intake track and remove carbon deposits.I highly recommend it,I use it on cars I service and it is brilliant.Any Repco store sells it.Threebond Engine Conditioner,try it.

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post #9 of 61 (permalink) Old 02-10-2016, 04:16 AM Thread Starter
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Cheers Mitch, that should be easy to find I`ll give it a crack
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post #10 of 61 (permalink) Old 02-10-2016, 04:44 AM
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