Bombus Speedshop

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

Monday, February 24, 2014

The dogcage

A dogcage?
Yes, life ain´t just motorcycles.
Finally the scratchbuilt cage was done. The frame I made of 20mm square tubing.
I even made the grid out of welding rods and jointed it with silicon bronze.
The little rascal in his new carhome.

Monday, January 13, 2014

Beltdrive issues + dogcage...

The beltdrive circus took of just as the parts landed here in Sweden.
But when I first mounted the new goodies distaster occured.
The belt was to short, or at least that was the outcome.
After talking to my friends who have been wrenchin Harleys since the seventies the common answer was that aftermarket parts are only so you don't had to develop the whole thing but the last bit is all up to you.
Hmmm, was it really this bad? Of Course it was. But thats half the fun.
As the quote goes "If It Was Easy Everyone Would Do It".
*Hehe*
Meassurement begun big style.
The 130 belt was waaaay to short and almost snapped the axels when I mounted it.
Next step in belts was 132 and with this it was waaaay to long.
So after some mails to BDL the nice people sent me a new motor pulley that is .020 undersize.
The project now is to reassemble it all with the new pulley and hope for the best.

But something that halted this project was arriving of a small puppy in our family.
The new little dog had to ride the car with style so the mammoth job of making a dog cage begun.
Have been working with this cage now on and of for two months and now finally I see the end of it.
So soon the belt/pulley problem solving would start again.

Thursday, November 7, 2013

Beltdrive/clutch & charging system

Finally I decided for real that the old primary assembly had to go.
This is something I have wanted since day one but now it happend.
The FLT trans had the "clever" lubrication system that should just drip at the chain or whatever the reason was.
Probably this was replaced with the trusty "oil-in-trans" system by the first service interval.
But the FLT trans wasn't made to hold oil in so leaking begun and have continued since then.

A complete BDL kit was ordered and the old stuff was removed and a cleanup begun.
Not only the primary parts was to be replaced but also the charging system.
When I sent for the belt kit I also went for a complete Accel 32A charging system.
It wasn't really something wrong with any of the old chain/clutch/charging but after 33 years it was time for a upgrade.

The tear down begun with full determination so the primary should be empty and ready for the new novelty parts.

The last chain pic

Clean primary waiting for a belt kit

And the novelty parts arrived

The belt kit looked magnificent in it's box

Down to the mancave with all the shiny parts and than the problem started.

To be continued....

The seventh winter (13/14)

This winter there will be both mechanical and cosmetic work done.
# Beltdrive/clutch & charging system
# Ignition
# Seat
# Some paint

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