New Engine !!!
I just bought a new (old) engine from
Choppers. This is my new Winter Project. I'll try to
keep things updated as I progress.
Planned Engine Projects:
With the new-found test bed engine, I hope to explore some of
the refinements available for the XS650 engine:
- 270 Degree Re-Phase of Crank and Camshaft
- Electronic Ignition
- Permanent Magnet Alternator
- Tapped Ports for Oil Cooler and High-Flow Oil Pump
If anyone has helpful hints that they'd like to share, I
would appreciate any suggestions and comments.
Planned Chassis Projects:
Also on the agenda as time and cash permit:
- Swing Arm Bushings and Tapered Roller Bearings for
- Front Fork Brace and Swing Arm Reinforcement (maybe a
few inches stretch as well).
- Fitting a larger tank from an XS750.
- Check out the Travelcade
Bucket Seat that was added.
XS750 Tank and Motor "In the Raw":
Here is a look at the XS750 Tank ground down to steel, and
the approximate fit-up to the motor. The
Flames / Stripe (click
to see sketch) on the tank is a first thought - the lower
stripe would be clear coated bare metal with a "brushed" finish,
and the flames would be a Translucent Candy Orange showing the
"brushed" grain through - the rest of the tank could be last
year's Midnight Blue Metallic, or I might switch to Triumph
Comments are Welcome.
<-- The "New" XS750 Tank "before"
XS650 Alternator (Left Side Cover):
Here is a look at what's under the Left Side Cover of the
XS650 engine. The XS650 has an excited field alternator,
which means the magnetic field is generated by battery voltage
instead of permanent magnets. If you have a weak battery,
you get a weak field, and weak spark, and hard starting...
There are a few ways to install a Permanent Magnet Alternator on
the XS650, I'll be investigating them and providing results
Note the seeping Clutch Pushrod Seal to the left of the Chain
Pinion (Sprocket). This is the most common oil leak point
on the XS650. This engine has the standard 17-tooth front
sprocket installed. Installing an 18-tooth front sprocket
decreases engine RPM at highway speeds, thus reducing vibration
during highway cruising. You need to remove the Chain
Guide off of the Shifter Shaft (rusty thing sticking out just
below the Chain Sprocket) to clear the 18-tooth pinion.
has replacement Clutch Pushrods, Bushings and Seals, as well as
18-Tooth Sprockets and Chains.
XS650 Clutch (Right Side Cover):
Here is a look inside the Right-Side cover of the XS650
engine. Note the clutch pack in the center (or centre,
depending on where you're reading this...). The smallest
gear ahead of the clutch (to the right in the photo) drives the
oil pump and tachometer. You can see the gear selector
mechanism behind the clutch pack - this is driven by a rod that
travels through the engine from the left side (where the shifter
pedal is attached near the chain sprocket). In the overall
photo you can barely see the gear (to the rear, or left of the
photo) that is driven by the kick start mechanism.
Below is a different view of the shifter mechanism, and also
the inside of the Right Side Cover with the Oil Pump and
Tachometer drive installed. (Click Photos to enlarge them
in a new window.)
MORE SOON !!