My shop is in an over-sized two-car garage attached to my home. My work is a calling, in the theological sense of the word. Ethical and moral questions arise every day – they are hard, sharp, unambiguous and unavoidable.

An engine’s tale

Posted: May 8th, 2012 | Author: Administrator | Filed under: Engine, Motorcycle Repair | Tags: | No Comments »

J & N,

If resurrecting moribund old Honda engines is holy, then I’m on my way to sainthood. Did you know this one was seized? Not badly, as it turned out, and only on one side.

The attached pix will show you what I found as I went along.

See that one spark plug hole has been stripped, drilled out for an insert, and that has been buggered so that no plug was in the hole – for quite a while judging by what I found inside.

The heads of the screws holding the alternator cover in place were long gone. At the point of the picture, I had cut a slot in the heads of two with a small cold chisel sized to fit the blade of one of my impact driver bits. That moved them. If it hadn’t, there was one more possible move before drilling them out.

Now, with a 14mm socket on the end of the crank, I am sure that the engine is stuck.

The head came off relatively easily as I have been anointing all the fasteners with PB Blaster for the past few days.

I cleaned the debris out of the stuck cyl/piston and covered it in a pool of PBB to soak overnight. This afternoon I placed a 1″ hardwood dowel atop the piston and gave it a short stroke with 2lb. brass hammer. Tapping alternately the top of one piston and then the other eventually began to move the piston and soon I had it free enough to pull the cyls. up off the pistons.

This was likely a newly-built engine on its first overbore – the bores are roughly 64.25 mm. and have no taper or ovaling. The pistons are straight and square too. But the machinist who did the boring did not leave sufficient piston/cyl. clearance – the pistons are larger than nominal spec – and the engine had a light seizure – or two. The next thing that happened was that whoever responded to the seizure got that plug cross-threaded and stripped – or perhaps the heat of seizure stuck the steel plug hard in the alloy head.

The man with the wrench is already pissed off. His brand-new engine has just puked and now he’s gone and made things even worse. Out comes the hand-held power drill and a heli-coil insert. And you can guess the rest. The poor beaten bastard just dropped his tools and walked away leaving that cyl. open to the atmosphere.

Every engine – every machine – tells me stories about it’s history. My work is kind of archaeology – digging into the past, interpreting the traces/evidence of those who have gone there before.

I’ve 3.5 hrs. in so far inc. researching best available prices for pistons/rings/pins, tensioner, cam chain, etc. The only set of NOS Honda pistons I could find in the US was fouth-over (last overbore) and with rings sourced from elsewhere would have been more $ than the set I have ordered from the place in the Netherlands I have used before with satisfaction. They also had the best combo price for the tensioner body/small roller and the big roller. But their cam chain was twice what I can get a good one for here. The parts were 219 Euros which is around $290. With shipping it’s about $320.

Cheers,
Chris

Existential Motorcycles TEL: 828-6839289 Web: http://www.existentialmotorcycles.com
Alexander, NC 28701


Good sources for vintage Honda parts

Posted: July 28th, 2010 | Author: Administrator | Filed under: Engine, Forks & Steering, Frame & Body, Fuel & Air, Ignition, Timing, & Electrical, Motorcycle Repair, Wheels, Tires, & Brakes | Tags: | No Comments »

Here are links to a few sites that I have found have a good inventory of new vintage Honda parts:

http://www.cmsnl.com/

This one is in the Netherlands but I’ve gotten parts from them in a week or so – and they have stuff that no one else has.

http://www.babbittsonline.com/pages/parts/viewbybrand/default.aspx

Babbitts is good too – and they have on-line parts diagrams for just about every vintage Japanese bike.

http://www.ohiocycle.com/

http://www.classicjapanesemotorcycles.com/

http://www.westernhillshondayamaha.com/aboutus.asp

http://www.vintageconnections.com/

a source for OEM type electrical connectors, etc.

http://www.davidsilverspares.co.uk/

Excellent inventory and prices are o.k. now that the British Pound has tanked against the dollar.

http://www.hondarestoration.com/


“Eets the leetle sheets will get you.” Ricardo C. Passalaqua

Posted: July 19th, 2010 | Author: Administrator | Filed under: Fuel & Air, Motorcycle Repair | Tags: , | No Comments »

To: “Chris Finlayson” <acf2×2000@yahoo.com>
Date: Monday, March 8, 2010, 2:15 PM

Chris,

Had the 360 running nice, was actually out a couple of days when there
was a break and it was 50. Now she no  wanna start. new battery,
connections good plenty of juice, electric start sounds like it is not
up to it, kick start, nothing rolling down hill it goes, but does not
catch.
air filters clean, intake boots connected

spark yes

gas is fresh

I suspect the kill switch. I am not sure why. Maybe it is the way he
looks at me as I walk by? I have noticed that the starter makes the
exact same sound of not starting in all three positions of the switch.
Could there be some corrosion in that puppy? Is this something that
happens?

Other than that. How you doin? Survive the winter okay?

Bill

_______________________________________________

Bill,

If you’ve got good spark, the leering kill switch is not the culprit.

First thing I would check is that the fuel is flowing freely from the tank to the carbs.  Do you have filters in the lines?   The slow starter motor could be separate problem.

Make sure the vent in the gas cap is working.  If not, you can have perfectly functioning/flowing everything else – and the initial flow of fuel when you turn the tap on will draw a vacuum in the tank sufficient to slow flow to a trickle and then stop.  Opening the cap will make a small whoosh and the fuel will flow.
At the moment I am late to look at/buy and XS650 so this is brief.

Cheers,
Chris
Existential Motorcycles
Alexander, NC

___________________________________________________

Chris,

Okay. The switch says you are a freaking genius. Opened the gas cap, started just fine.

Bill