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General Category => General Discussion => Topic started by: dgurovich on November 27, 2017, 03:40:55 PM

Title: New-to-me 850T -- anything else I should do?
Post by: dgurovich on November 27, 2017, 03:40:55 PM
I was able to score a 17,000 mile 850T recently.   It has the "upgraded" brake master cylinder in the front when I got it.  I have a new starter and solid state relay, LED marker lights installed, and I just put in a set of brand-new Gilardonis.  See pix.

Two questions -- is there anything else I should watch out for that might be a known issue?

The old cylinders and pistons are in good shape, no flakes or marks on the bores.  Are they worth anything?  Fleabay them?

(http://chasingmotorcycles.com/wp-content/uploads/2017/11/850-13.jpg)
(http://chasingmotorcycles.com/wp-content/uploads/2017/11/850-12.jpg)
(http://chasingmotorcycles.com/wp-content/uploads/2017/11/850-11.jpg)
(http://chasingmotorcycles.com/wp-content/uploads/2017/11/850-10.jpg)
(http://chasingmotorcycles.com/wp-content/uploads/2017/11/850-9.jpg)
(http://chasingmotorcycles.com/wp-content/uploads/2017/11/850-8.jpg)
(http://chasingmotorcycles.com/wp-content/uploads/2017/11/850-7.jpg)
(http://chasingmotorcycles.com/wp-content/uploads/2017/11/850-6.jpg)
(http://chasingmotorcycles.com/wp-content/uploads/2017/11/850-5.jpg)
(http://chasingmotorcycles.com/wp-content/uploads/2017/11/850-4.jpg)
(http://chasingmotorcycles.com/wp-content/uploads/2017/11/850-3.jpg)
(http://chasingmotorcycles.com/wp-content/uploads/2017/11/850-2.jpg)
(http://chasingmotorcycles.com/wp-content/uploads/2017/11/850-1.jpg)
Title: Re: New-to-me 850T -- anything else I should do?
Post by: rodekyll on November 27, 2017, 03:50:40 PM
I'm assuming it had chrome bores and you replaced them -- good idea!

Did you check for sludge and chunks in the crank sump?  Drain and clean the fuel tank?

I'd check the lube on all the greasable bits and change all the fluids.  If you're anal, pull the wire connectors and petro-jelly the terminals.  Otherwise the miles seem to be the most neglected thing about it.   :thumb:
Title: Re: New-to-me 850T -- anything else I should do?
Post by: Testarossa on November 27, 2017, 04:00:56 PM
The other issue with these bikes is the rubber block that passed for a chain tensioner. It gradually erodes and should be replaced with a slipper-type tensioner. Meanwhile the very fine rubber particles circulate with the oil. The stuff is soft enough that it doesn't damage bearings, and I've never heard of it blocking oil passages, but it does accumulate in the sludge trap. Change the oil frequently, and plan to clean out the sludge trap when you get to around 50,000 miles. You'll want to change to the new-type tensioner by then anyway.
Title: Re: New-to-me 850T -- anything else I should do?
Post by: fotoguzzi on November 27, 2017, 04:57:52 PM
did you get one with oil filter? early T's didn't have that feature.
Title: Re: New-to-me 850T -- anything else I should do?
Post by: dgurovich on November 27, 2017, 05:00:53 PM
This represents as a pretty early T.  I did change the oil and it was spotless.  The bike looks to have been maintained quite well.  The P.O. obviously loved this bike. 
Title: Re: New-to-me 850T -- anything else I should do?
Post by: Guzzistajohn on November 27, 2017, 07:17:14 PM
I wouldn’t get far from home w/o a spare throttle and clutch cable.
Title: Re: New-to-me 850T -- anything else I should do?
Post by: dl.allen on November 27, 2017, 07:20:26 PM
Make sure the head gasket has the oval holes where the push rods go through. They will rub on round ones and eat through the gasket.
Listen and feel for u joint going out.  They will give lots of warning.
Rear hub cush rubbers are easy to change.
Can chain tensioner as mentioned.
These are issues mine had when I got it.  Unknown mileage
Title: Re: New-to-me 850T -- anything else I should do?
Post by: LeRoy on November 27, 2017, 08:54:14 PM
Looks like a very nice example of the breed.

If you'd be interested, send me a PM with your mailing details and I'll drop a CD in the mail with PDF copies of all the 850-T factory manuals, helpful hints, copies of period ads and articles and a range of other Guzzi information. Shipped anywhere, no charge. Other WildGuzzi members are welcome to the same. I also have CDs for most '70s and '80s Tonti models as well as a few others. Just send me PM and let me know what you'd like.
Title: Re: New-to-me 850T -- anything else I should do?
Post by: Moto on November 28, 2017, 08:14:48 AM
Looks very good!

Take care of the seat. They don't make them like that anymore, and the ones they do sell are the Convert/G5 design that will make your sweet T look like a barge.
Title: Re: New-to-me 850T -- anything else I should do?
Post by: Perazzimx14 on November 28, 2017, 09:39:13 AM
I have a brand new Valtec bow style timing chain tensioner I'll sell for $25 shipped in the lower 48.
Title: Re: New-to-me 850T -- anything else I should do?
Post by: Moto on November 28, 2017, 12:38:54 PM
I have a brand new Valtec bow style timing chain tensioner I'll sell for $25 shipped in the lower 48.

PM sent.
Title: Re: New-to-me 850T -- anything else I should do?
Post by: Perazzimx14 on November 28, 2017, 12:53:57 PM
PM sent.

It's all yours
Title: Re: New-to-me 850T -- anything else I should do?
Post by: canuck750 on November 28, 2017, 04:31:51 PM
My 2 cents;

replace fuel lines

clean and inspect front and rear wheel bearings, replace if in doubt

strip and clean brake caliper, fit a seal rebuild kit and if the pistons are corroded install an anodized aluminum replacement set, replace pads if in doubt, replace the hydraulic brake lines

inspect the rear brake shoes

check steering head bearings, replace with new tapered bearings if showing signs of wear

clean swing arm bearings, re-pack with grease and replace seals

strip and clean carbs, install a rebuild gasket and O ring kit, set float height

inspect / replace all throttle, choke and clutch cables

replace valve guides and springs, grind valves and seats

install electronic ignition





Title: Re: New-to-me 850T -- anything else I should do?
Post by: Chuck in Indiana on November 28, 2017, 04:44:28 PM
Quote
replace fuel lines

Including the crossover that can pull loose at the swaged connections and burn up your motorcycle. Use the dual banjos instead.
Title: Re: New-to-me 850T -- anything else I should do?
Post by: Guzzistajohn on November 28, 2017, 05:13:42 PM
Including the crossover that can pull loose at the swaged connections and burn up your motorcycle. Use the dual banjos instead.


Dualing banjos???????  NO THANKS!!! Squeal like a pig ssssooooooooowwwwwe eeeeeee!
Title: Re: New-to-me 850T -- anything else I should do?
Post by: dgurovich on November 28, 2017, 06:51:39 PM
Valves, guides and springs were cleaned and checked.  Rockers polished.  New fuel lines.  I will be draining and cleaning out the brakes over the winter.  Using the Brisk Spark Plugs, as they are like the old Golden Lodge, which were absolutely awesome and require no indexing.

Got a Stainless Cycle kit for it as well,

and the seat is -- pristine!
Title: Re: New-to-me 850T -- anything else I should do?
Post by: perter on November 29, 2017, 04:32:59 AM
Really nice bike! :thumb:
Perhaps it would be worth checking the internal filters on the peacocks and clean the tank for rust and other debris? At least mine were clogged and gave poor fuel supply when the tank was close to emptly.
Title: Re: New-to-me 850T -- anything else I should do?
Post by: Two Checks on November 29, 2017, 06:59:28 AM
Those tensioner pieces found their way to the rocker arm shafts and found a home ruining the shafts and rocker bushings.
Tappy valves were not happy.
Title: Re: New-to-me 850T -- anything else I should do?
Post by: n3303j on November 29, 2017, 09:20:06 AM
Didn't see it mentioned; Head oil lines should be renewed.

As far as ignition goes I'd be in no rush to exchange the original for an aftermarket electronic. 90,000+ miles on my T3 and replaced the points once (out of guilt, not need). Coil / Breaker systems usually don't experience catastrophic failures. Electronics either work well or leave you stranded without warning.
Title: Re: New-to-me 850T -- anything else I should do?
Post by: Shorty on November 29, 2017, 11:03:11 AM
Find the main ground down under the fuel tank. Clean corrosion and assure solid connections.