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85 R80 Mono Engine Probs

Posted: Wed Jul 27, 2011 12:03 am
by Bob Bennett
I think I've found the main problem, and a couple of others.
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Re: 85 R80 Mono Engine Probs

Posted: Wed Jul 27, 2011 1:41 am
by Major Softie
That certainly rates as a genuine one. What are all the others?

Re: 85 R80 Mono Engine Probs

Posted: Wed Jul 27, 2011 2:43 am
by Ross
Bores ok??? :?

Re: 85 R80 Mono Engine Probs

Posted: Wed Jul 27, 2011 3:40 am
by ME 109
Hmmm, not much engine left in the frame Bob. :(

Re: 85 R80 Mono Engine Probs

Posted: Wed Jul 27, 2011 6:19 am
by Bob Bennett
Yeah MS, it's a big one, the rest are all rattles mate, more than a millionairs baby, could
move the exhaust valves about 1.5 mm sideways when full open, piston slap, etc, new valves
and guides will be going in.

Ross, I can't see any major scores in the bore, they are fairly used though but, it doesn't matter as Bins had kits on
special last month, 295 quid for barrels, pistons, rings, gudgeons, gaskets, etc, so all to be replaced.

Thats right Jeff, not a lot left in the frame, and I found that bolt to use in the rotor for when the RMS gets here,
thanks for that tip , I'm a bit slack though, as I've only taken the front grill of the fairing off.

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Re: 85 R80 Mono Engine Probs

Posted: Wed Jul 27, 2011 6:22 am
by Ross
From when I had to do an engine swap..

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Re: 85 R80 Mono Engine Probs

Posted: Wed Jul 27, 2011 6:38 am
by Bob Bennett
That was quick Ross, you at work are you?
Yeah mate I haven't had to take the whole engine out of this one, touch wood.

Re: 85 R80 Mono Engine Probs

Posted: Wed Jul 27, 2011 7:22 am
by Ross
Bob Bennett wrote:That was quick Ross, you at work are you?
Yeah mate I haven't had to take the whole engine out of this one, touch wood.
At home mate. On early shift for some of this week so finish at 2pm.

I learnt so much about BMW Airheads by pulling mine down. Really don't want to do it again but at least I now know how.

Re: 85 R80 Mono Engine Probs

Posted: Thu Jul 28, 2011 2:25 am
by Major Softie
1.5mm sideways valve movement, broken rings, piston slap, worn bores...

How many miles were on this motor anyway???

Re: 85 R80 Mono Engine Probs

Posted: Fri Jul 29, 2011 7:46 pm
by Bob Bennett
Major Softie wrote:1.5mm sideways valve movement, broken rings, piston slap, worn bores...

How many miles were on this motor anyway???

It's a lot Major, With whats on the odometer and the general state of things it's either 300,000 Km
or 400,000 Km. my guess is the latter!!