Water Cooled XS
Racers tried all sorts
of modifications to gain a winning edge.
Twin Engined XS Dragster
Bill Wallis sent these
pics to me of this twin engined dragster
but that's all I know about it at the
Wayne Kennedy found
this little gem somewhere in Gippsland.
Supercharged and fuel injected XS650. It
has a Kawasaki KLX250 swing arm that he
said fitted straight in with no mods at
all and is currently running about 4Lb
I really love reading about your
Club Racer. Y'all have put a lot of
great work into it.
I'm really interested in the head
porting that your doing. I hope you
publish the details when its all done.
I did a slight port and polish to my
Bobber, I did open up the intake bore to
1.5" to match the intake and carb I
It was fun re-engeneering the top end to
run the head backwards, with the crank
pin I got from Ivan I did a rephase and
the 750 kit and hot cam from Mikes, Bob
really runs well and is so much fun to
ride through the hills and twistees.
Is there anything that I can do to help
support the Club Racer? Let me
Thanks to you and all your club members
for the great 650 spirit y'all
Id love to come over and visit
Before and after shots
of Andy's unusual reversed head bobber
How To Flip Your
Head ( without a pain
in the neck )
basically two ways to be able to run
your intake in the front and exhaust in
One way is to have a custom ground cam
with four new lobes that open and close
the opposite valves at the right time.
If I had a cam grinding machine I might
experiment with that a bit, but I don’t.
The other way is to flip the rocker arms
to the opposite cam lobes.
To do this I built me a fixturing jig to
hold the rockers, cut them and weld them
in the new location.
I then needed to install oil delivery
tubes to the rockers to oil the cam
The next thing you need to do is modify
the head at the head gasket sealing
I welded a ¼” thick aluminium plate
to the front and back of the head to
fill in for the gasket, had the head
machined flat and drilled a bolt hole.
Install the head backwards with a new
head gasket, cam goes in the normal way
with the threaded end to the right.
Install rocker arms in top cover the
same way as normal.
Put the top cover on and torque the
I needed to drill and tap two mounting
holes to mount my ignition plate on the
I took an 1/8” plate to cover the
breather opening to have clearance for
the main oil tube.
A little grinding on the front of the
head where the rear bolt use to go
through will give you enough clearance
for the tube.
I took the rocker inspection cover
with the four bolts, drilled a 3/8”
hole near the top and bolted in a hose
barb for my crankcase vent.
There’s lots of options for intake and
exhaust . I had to use a jack to give me
a little more room through my front
That’s how I did it,
I'm Renaat Souvagie, 17YO, and I live in
I might have something for you to put in
This is my homemade kart, with an XS 400
engine. I've bought this engine for 150€...
I worked about 7 months on this kart,
and still, it is not ready yet. I have
to paint it, and do some electronics for
the lights, horn,...
But it does ride, about 130km/h, which
is very cool when there is only 4cm
between the road and your bottom :)
If you're interested, let me know, and
I'll send you some more specs and
A Real Chopper
Listed on ebay in
the USA this XS650 powered helicopter.
single seat helicopter. Powered by an Yamaha 650CC
Parallel twin motor that runs very well. Comes
with a complete set of original plans, and
original receipts. Main rotor blades and tail
rotor blades are in good shape. Cosmetically, the
paint is in good shape and there are only minor
blemishes. The aircraft is complete and only needs
to be gone over and fine tuned to include main
rotor tracking and adjusting the tail rotor pitch.
The helicopter has been ground run, but not flown
by the current owner. NOTE: This is a real
helicopter! If you are not trained, DO NOT try and
fly this thing because you have the potential to
kill yourself or others. If you go to vortech.com
you will see that the basic kit for this
helicopter is over $23,000. Call Mike @ (406)
Just saw this on the web and had
to have it! A trike for a leprechaun!
Our own Colin Carey's mower, the
grass don't stand a chance!
What about a XS650 Tractor, I
found this pic on Bob Bertaut's website.
Turbo charged XS650 engined sand rail.
Worlds ugliest XS650 Rat Bike
This Go Cart might be a bit too quick for the kids
and a bit too loud for the neighbours!
How about the worlds fastest XS650
Here's an unusual use for our beloved XS650
engine, looks like it belongs in Robot Wars,
should call it Buzz saw!
Bob Bertaut never quits, here's
his latest project the XSR1. To keep an eye on his
progress check out http://www.650motorcycles.com/XSR1.html
have any oddball pics of XS650's, send 'em in and
I'll stick 'em in here for everyone to see.
03 November, 2014