Bombus Speedshop

Bombus Speedshop
Wrenchin' without supervision since the seventies...

Wednesday, October 30, 2013

Dellorto dynorun

Now I was ready for some serious tuning.
After a while with lots and lots of short test runs I had a Dellorto set-up that looked amazing and with reasonable driveability. The next step was to do the final tuning on the dyno.
The third time around on the dyno for this bike. First: S&S, second: CV and third: Dellorto

On the dyno with the Dellorto, at last

But it took untill autum 2013 before I got to do some dynoruns with the Dellorto.
Because I had to do a cover for the "wire wheel" and solve a problem with a sloppy return spring first and of course solve the dreadful problems that turned out to be the loose valve seat.
So I had to go back to the trusty old CV for a season (2012) to pass technical inspection and to get a proper dynorun on that carb also.
But now the problems are solved and the mighty Dellorto crowns the Shovel again.

But the best news was that the cool Dellorto was even better than the boring, mainstream CV !!


Turquoise -> CV vs Red -> Dellorto

Valve seat

Suddenly the bike was running good just on the front cylinder but poor on the rear when I felt strong enough to try a ride after my stroke.
Step 1A was initiated. Plugs, oil, fuel and pushrod adjustment but it ran still poor on rear cylinder.
Next step was compression test. Not so awesome result, but not bad either.
The action after that was a leakdown test. This time it sounded like it leaked out in the carb.
Aha, something with the intake valve. Rear head went off and so was the intake valve assembly.
Nothing strange here except a small mark in the rocker cover. Could it be the valve spring collar that hooked up against the rocker cover when running and not closing properly? Some light grinding in the rocker cover to get some clearance there followed by thorough cleaning.
Together with the head and new gaskets on to the bike. Time to push the button and darkness spread in my life. Same thing again. So new leakdown, this time it leaked into the exhaust.
Ok, just to start the disassembly again. This time we saw a fraction of a mark in the exhaust side of the rocker cover also.
Grinding a little for better clearance on that side also and thorough cleaning again. But than when we took apart the exhaust valve assembly it all got clear.
When the exhaust valve slided out the valve seat came with it.
A valve seat should NOT come out by itself. Period ! But this did.

The valve seat when me and Mr Potato disassembled the exhaust valve assembly


No time to waste so back to work again.
A new seat was purchased and milled to size and a appropriate hole for it was made with the Mira valve seat cutter in the head by Potato speedshop.
Me and Mr Potato walked the extra mile one night and soon I had a healthy rear head in my possession to mount on the mighty Shovelhead again back in the mancave.
Rest of the job was kind of routine by now so putting it all together was easy, but timeconsuming.
This time when I pushed the button it sounded like a mighty Shovelhead should.
And so my season could begin in september, but still....
Autum in Sweden 2013 was supernice and I got a little over a month of riding before the rain came for real.
This thing to get some rides was not just a nice thing generally it really boosted my moral and recovery from my stroke and made me a happier man.

And finally the mean bagger got it's health back and could roar for a while even 2013

The sixth winter (12/13)

The sixt winter ended a little different.
March 14 2013 I got a stroke that didn't affected the winter so much as me and my familys life.
Happy to say is that I got some riding done in the autum.
A stroke is often the end of riding for good. Even if my stroke started out pretty bad with no speak and almost paralyzed left side including my left eye I recovered quick after my brain surgery where they removed three clots.
But It ended well (so far) and I'm recovering strong and hopefully I will be back at work in beginning of 2014.

This winter became not so active as I planned. My time in the mancave was mostly filled with coffe and laughter. Not a bad complement to wrenching but the Shovel bagger got a little neglected for sure.
Main jobs was to remount the Dellorto carb again and finally get it running properly. The autum before it ran like a dream with the CV but when I felt stable enough for a bagger ride the mighty Shovelhead sounded a little sick. First I thougt it was the Dellorto causing the problem but I realized soon it was much worse problems involved.

# Valve seat
# Dellorto dynorun

Tuesday, October 29, 2013

Sidebag hinges


Another thing that have been bugging me since day one was the poor way to mount the lids on the sidebags.

In the beginning the lid came off when unlocked, in the front it was just a tab that went in to a hole
and this was a bad idea from the beginning so after 30yrs of rattle it had become even worse.
So I saved the hinges from the Tourpack before I threw it in the bin.
With some tweaks the hinges was mounted and I had a fairly solid solution with a hinge in the front of the bag.
Next step is some of solution for it to stay open when unlocked, but more about that later.

  The Tourpack residues got new life

CV carb again

I had to do a cover for the "wire wheel" and solve a problem with a sloppy return spring on the mighty Dellorto carb so I had to go back to the trusty old CV for a season to pass technical inspection. (every other year here in Sweden)
This was a straight forward job. The CV had been working perfect before so it was just to remount it with all the old hardware, cables and airbox.

Seatpans


Two seatpans was made of fibreglass and epoxy.
This time I made them with the bike as a mould to get low profile and perfect fit.
I made two of them, one for a big comfortable dual seat and one to the sleek but still comfortable “Badland” style seat.
But the final job making seats of them was put to halt and will be done a later year.


I made two of those

The fifth winter (11/12)


This really became a middle year in the life of Swebagger but still some stuff was made...
And even this year the first spring run was made in the middle of the summer.

# Seatpans (again)
# CV carb again (a quick swap back to the CV)
# Sidebag hinges (Tourpack residues)