08-26-2018, 08:38 AM
(08-26-2018, 06:05 AM)Flynrider_imp Wrote: I'm inclined to agree that some form of contamination led to the excessive carbon build up on top of the pistons. Who knows when it happened. For all you know, this could be something that started with the previous owner.
The only time I've seen anything like this was an old Kaw 750 twin engine I tore down for a friend. He'd had it stored in the garage for years and would start it up occasionally to "keep the top end oiled". This is generally not a good practice, but to make matters worse, the gasoline in the tank was well over 2 years old and had degraded to the point where it smelled like turpentine. On pulling the head, I found a thick layer of carbon deposits on all of the piston tops and scored cylinder walls.
Yeah I have no clue. The first owner put 7k miles on it over the first 4 or so years of the bikes life. I put 4K miles on it in 4 months, so I’ve never had the same gas sitting in it for long aside from winter with stabil in it.
It’s just something I have to deal with, financially haha. Oy vey
(08-26-2018, 08:10 AM)beardyweirdy@me.com_imp Wrote: Hey QUINTtastic, That's a bummer! I unfortunately have a set of pics just like those, not from my CB tho. I had a bike that had it's petrol tank sealed by a previous owner. The newer fuel, with high ethanol and the like, had broken down the sealant and washed it into the engine. Is there any chancy someone could have sealed the tank previously? They are all long shots but could be....
Oh no this bike was too new and too babied to have that happen. Crazy how so many different scenarios have done this to peoples bikes. Sad sad times. I can’t wait to crawl up in fetal position after I hand the dealer my credit card