Showing posts with label Mikuni carburetor. Show all posts
Showing posts with label Mikuni carburetor. Show all posts

Sunday 8 November 2015

Sense of Satisfaction!

After all the Maker talk this week at a conference I attended, I was keen to spend some quality time in the garage working on the 35 year old XS1100 basket case.  It's easier to walk the walk than talk the talk when it comes to Making.  Unlike the education approach infused with collaboration for your own good, I did it the way I always do: alone in a garage.  It's wonderfully cathartic to get something broken working again, and meditative when I don't have to explain everything I'm doing.

How do you get a 35 year old motorcycle left outside for several years unattended working again?  Very carefully!

The front brakes were seized, the throttle body was seized, the rear brake is still seized, as are other things I haven't found yet.  Motorcycles aren't like cars, when they're left in the world they don't have a shell protecting the mechanicals from the weather.  Restoring a car tends to be more mechanically salvageable as a result.



I ended up having to take the end carburetor off the rack of four Mikunis that line the back of the Yamaha engine.  It was the most carboned up and filthy one, and the grit had seized the throttle body rod.  A complete dismantle, cleaning and reinstall has the carb working again (before this you couldn't move the throttle body without great effort and a nasty creaking sound...



It took a couple of hours to break it down, find the problem and rebuild it.


It was pretty before, but the Mikunis are even prettier now that they work!

Sunday 25 October 2015

Rainy Day Carburators

A cold, rainy Saturday had me break down the carburetor on the Yamaha XS1100.  A Triumph Spitfire and Mercury LN7 owned as a teen made me pretty handy with carburetors.  In addition to multiple rebuilds I also got handy at jury rigging manual chokes thanks to the utterly crap Ford Escort carb set up.

The beautiful Mikuni unit on the Yamaha looks like a piece of industrial art in comparison to the pedestrian Triumph and Ford carbs, unfortunately it's seized.  After breaking down the top end I soaked it and freed up the seized throttle body.

The next to-do with the Yamaha is to clean up the gas tank and then reassemble the fuel system.  The engine isn't seized and spins easily, so I think I'll have an easy time firing it up for the first time in years (knock on wood).

Here are some pics of Mikuni's Yamaha masterpiece:




The throttle cable wasn't playing nice even after taking apart the handle bar - so into the carb I go...

The Yamaha XS1100 engine block with the carbs off - it got the Warhol treatment....


Like everything else so far, the internals look to be in good shape on the old (35 year old!) Yamaha

Cleaning up the fasteners using the caps from each carb to keep things organized.


XS1100 is in for surgery

Not many riding days left as the weather turns up here in Canada